PSS369-7G [BEL]
DC-DC Regulated Power Supply Module,;
| 型号： | PSS369-7G |
| 厂家： | 
BEL FUSE INC. |
| 描述： | DC-DC Regulated Power Supply Module, |
| 文件： | 总22页 (文件大小：4637K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PSK / PSS Series
Positive Switching Regulators
The PSK/PSS Series of positive switching regulators is de-
signed as power supplies for electronic systems, where no
input-to-output isolation is required. Their major advantages in-
clude a high level of efficiency, high reliability, low output ripple,
and excellent dynamic response. Models with input voltages
up to 144V are specially designed for secondary switched and
battery-driven mobile applications. The converters are suitable
for railway applications according to EN 50155 and EN 50121.
Two types of housing are available allowing operation up to
71 °C. They are designed for insertion into a 19" DIN-rack or
for chassis mounting. Replacing the heat sink by an optional
cooling plate, allows chassis or wall mounting on top of a metal
surface, acting as heat sink.
Various options are available to adapt the converter to differ-
ent applications. Connector type: H15 or H15S4, depending on
output current.
111
4.4ꢀ
3 U
Features
80
3.2ꢀ
16 TE
168
6.6ꢀ
• RoHS lead-free-solder and lead-solder-exempted
products are available
• 5 year warranty for RoHS compliant products with an
extended temperature range
• Input voltage up to 144 VDC
• Single output of 5.1 to 48 VDC
• No input-to-output isolation
• High efficiency up to 97%
• Extremely wide input voltage range
• Low input-to-output differential voltage
• Very good dynamic properties
• Input undervoltage lockout
111
4.4ꢀ
3 U
• Active current sharing for parallel operation
• Output voltage adjustment, inhibit, and sense lines
• Continuously no-load and short-circuit proof
• All boards are coated with a protective lacquer
60
2.4ꢀ
12 TE
168
6.6ꢀ
Safety-approved to the latest edition of IEC/EN 60950-1
and UL/CSA 60950-1
Table of Contents
Electromagnetic Compatibility (EMC).................................14
Mechanical Data.................................................................15
Immunity to Environmental Conditions...............................16
Safety and Installation Instructions.....................................19
Description of Options........................................................20
Accessories........................................................................21
Description............................................................................1
Model Selection....................................................................2
Functional Description..........................................................3
Electrical Input Data .............................................................4
Electrical Output Data...........................................................6
Auxiliary Functions .............................................................12
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PSK / PSS Series
Positive Switching Regulators
Model Selection
Table 1: Model Selection
Output
voltage
Output
current
Operating input
voltage range
Nom. input
voltage
Efficiency2
Type
Connector Options
designation 4
type
Vo nom [V]
Io nom [A]
Vi [V]
Vo nom [V]
ηmin [%] ηmax [%]
5.1
20
8 - 80
40
78
79
PSK5A20-9ECKG
H15
B, B1
12
12
12
12
12
9
18 - 1441
15 - 80
60
40
60
40
40
90
90
90
89
89
91
91
91
90
90
PSS129-9G
PSS1212-9G
PSK1212-9G
PSK1216-9G
PSK1220-9G
H15
H15
H15
H15
H15S4
-7, E, B, B1
B, B1
-7, E, C, B, B1
-7, E, C, B, B1
12
12
16
20
18 - 1441
15 - 80
15 - 80
-7, E, C, K, B, B1
153
153
153
153
153
9
22 - 1441
19 - 80
60
40
60
40
40
90
90
90
89
89
92
92
92
90
90
PSS129-9G
PSS1212-9G
PSK1212-9G
PSK1216-9G
PSK1220-9G
H15
H15
H15
H15
H15S4
E, B, B1
-7, E, B, B1
-7, E, C, B, B1
-7, E, C, B, B1
-7, E, C, K, B, B1
12
12
16
20
22 - 1441
19 - 80
19 - 80
24
24
24
24
24
24
9
31 - 1441
29 - 80
60
50
60
40
50
50
93
94
94
94
PSS249-9G
PSS2412-9G
PSK2412-9G
PSS2414-2G
PSK2416-9G
PSK2420-9G
H15
H15
H15
H15
H15
-7, E, C, B, B1
-7, E, B, B1
-7, E, C, B, B1
B, B1
-7, E, C, B, B1
-7, E, C, K, B, B1
12
12
14
16
20
93.5
93.5
94.5
93.5
93.5
31 - 1441
29 - 60
29 - 80
29 - 80
94
95
H15S4
36
36
36
36
36
9
44 - 1441
42 - 80
80
60
80
60
60
95
95
95
94.5
94.5
96
94
96
95
95
PSS369-9G
PSS3612-9G
PSK3612-9G
PSK3616-9G
PSK3620-9G
H15
H15
H15
H15
H15S4
-7, E, B, B1
B, B1
-7, E, C, B, B1
-7, E, C, B, B1
-7, E, C, K, B, B1
12
12
16
20
44 - 1441
42 - 80
42 - 80
48
12
58 - 1441
80
96
97
PSK4812-9G
H15
-7, E, C, B, B1
1
Surges up to 156 V for 2 s; see Electrical Input Data
Efficiency at Vi nom and Io nom. Models with opt. K (standard H15 connector) exhibit approx. 1 to 2% lower efficiency.
Output voltage Vo set to 15 V by R input.
2
3
4
Part numbers without suffix ‘G’ use the leaded solder exemption.
Note: Non-standard input/output configurations or special custom adaptations are available on request.
NFND: Not for new designs.
Preferred for new designs.
Part Number Description
PSK 12 12 -9 E C B G
Positive switching regulator in case S01, K01 ........PSS, PSK
Nominal output voltage in Volt.................................... 5.1 – 48
Nominal output current in Ampere................................. 9 – 25
Operational ambient temperature range TA
– 10 to 50 °C ......................................................-2
–25 to 71 °C ......................................................-7
–40 to 71 °C (optional) ......................................-9
Options: Inrush current limitation.......................................E
Thyristor crowbar................................................ C
Standard H15 connector .....................................K
Cooling plate large/small.............................. B, B1
RoHS-compliant for all 6 substances ............... G2
1
Option P excludes R-features and vice versa.
G is always placed at the end of the part number.
2
Example: PSS129-9ECB = Positive switching regulator with output 12 V, 9 A, ambient temperature range of –25 to 71 °C, inrush
current limitation, crowbar, and large cooling plate option B.
Note: The sequence of options must follow the order above.
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PSK / PSS Series
Positive Switching Regulators
Product Marking
Typedesignation, applicableapprovalsmarks, warnings, pinallocation, identificationofLED, testsockets, andoptionalpotentiometer.
Label with input voltage range, output voltage and current, protection degree, batch and serial no., and data code including production
site, version, and date of production.
Functional Description
The switching regulators are using the buck topology. The input is not electrically isolated from the output. During the on period of
the switching FET, current is transferred to the output, and energy is stored in the output choke. During the off period, this energy
forces the current to continue flowing through the output choke and the freewheeling diode to the load. Regulation is accomplished
by varying on/off duty cycle. Switching frequency is approx. 100 kHz. The converters exhibit an undervoltage monitor to prevent
high currents at low input voltage, but no overvoltage monitor.
These regulators are ideal for applications, where an input to output isolation is not necessary or where it is already provided by an
external front end, e.g. a transformer with rectifier. To optimize customers’ needs, various options and accessories are available.
03024a
Io
4
Fuse
Vo+
I i
6
30
32
+
Vi+
Co
S+
T
20
22
14
16
18
Ci
Control
circuit
Vi
Vo
i
Option C
R
S–
26
28
ꢀi–
8
ꢀo–
10
24
Option P
+
–
Fig. 1
Block diagram
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PSK / PSS Series
Positive Switching Regulators
Electrical Input Data
Table 2a: Input data. General Conditions: TA = 25 °C, unless TC is specified
PSS1212
PSK1216
PSK1220
Unit
Model
PSS2414
PSK5A20
Characteristics
Conditions
min
typ
max
min
typ
max
min
typ
max
Vi
Operating input voltage
29
60
5
8
80
15
80
3
Io = 0 – Io nom
,
∆Vio min Min. diff. voltage Vi – Vo
2.9
VDC
TC min – TC max
Vi o
Ii 0
Undervoltage lockout
No-load input current
Inrush peak current
Input capacitance
12
6.5
7.3
Io = 0, Vi min – Vi max
Vi nom, with option E
50
40
50
40
50
40
mA
A
Iinr p
Ci
1600
1600
1600
µF
Table 2b: Input data. General Conditions: TA = 25 °C, unless TC is specified
PSS12121
PSS2412
PSK2416
PSK2420
PSS3612
PSK3616
PSK3620
Unit
Model
PSK12161
PSK12201
Characteristics
Conditions
min
typ
max
min
typ
max
min
typ
max
Vi
∆Vio min Min. diff. voltage Vi – Vo
Operating input voltage1
19
80
4
29
80
5
42
80
6
Io = 0 – Io nom
,
VDC
TC min – TC max
Vi o
Ii 0
Iinr p
Ci
Undervoltage lockout
No-load input current
Inrush peak current
Input capacitance
7.3
12
19
Io = 0, Vi min – Vi max
Vi nom, with option E
50
40
50
50
50
mA
A
90
1600
1600
1600
µF
1
Output set to 15 V with the R-input.
Table 2c: Input data. General Conditions: TA = 25 °C, unless TC is specified
Model
PSS129 / PSK1212
PSS1291 / PSK12121
PSS249 / PSK2412
Unit
Characteristics
Conditions
min
typ
max
min
typ
max
min
typ
max
Vi
∆Vio min Min. diff. voltage Vi – Vo
Operating input voltage1
18
1442
6
22
1442
31
1442
Io = 0 – Io nom
,
7
7
VDC
TC min – TC max
Vi o
Ii 0
Undervoltage lockout
No-load input current
Inrush peak current
Input capacitance
12
12
24
Io = 0, Vi min – Vi max
Vi nom, with option E
50
50
50
mA
A
Iinr p
Ci
4.5
4.5
4.5
620
620
620
µF
1
2
Output set to 15 V with the R-input.
Surges up to 156 V for 2 s are allowed (no shutdown).
Table 2d: Input data. General Conditions: TA = 25 °C, unless TC is specified
Model
PSS369 / PSK3612
PSK4812
Unit
Characteristics
Conditions
min
typ
max
min
typ
max
Vi
∆Vio min Min. diff. voltage Vi – Vo
Operating input voltage1
18
1442
8
22
1442
10
Io = 0 – Io nom
,
VDC
TC min – TC max
Vi o
Ii 0
Iinr p
Ci
Undervoltage lockout
No-load input current
Inrush peak current
Input capacitance
36
48
Io = 0, Vi min – Vi max
Vi nom, with option E
50
6
50
6
mA
A
620
620
µF
1
Surges up to 156 V for 2 s are allowed (no shutdown).
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PSK / PSS Series
Positive Switching Regulators
Input Filter and Fuse
An input filter and a fuse are incorporated in all converters as standard. The filter reduces emitted electrical noise and prevents
oscillations caused by the negative input impedance characteristic of a switched mode regulator. The input fuse protects against
fatal defects; see table 3.
Table 3: Input fuses
Model
Fuse type
Size
Supplier
PSK5A20
PSK1220, PSK2420, PSK3620
F 25 A
PSK1216
PSK2416, PSK2418, PSK3620
F 20 A
F 15 A
F 10 A
PSS1212, PSK1212
PSS2412, PSK2412
PSS3612, PSK3612, PSK3616
PSK4812
6.3 x 32 mm
Littlefuse
PSS129, PSS249, PSS369
The maximum permissible additionally superimposed ripple vi of the input voltage (rectifier mode) at a specified input frequency
fi has the following values:
vi max = 1000 Hz/fi • 1 V (or 10 Vpp at 100 Hz)
Inrush Current
Depending on the input source and the input impedance, the inrush current into the converter may reach a high peak value during
the switch-on. The inrush current peak value can be determined by following calculation; see also fig. 2:
JM001c
Converter
Lext
R ext
Vi+
Vi–
Vo+
Vo–
+
R i
Ci
Fig. 2
Equivalent input circuit
Vi source
_________
Iinr p
=
(Rs ext + Ri )
To limit the inrush current, we recommend the choice of the active inrush current limitation circuit, option E.
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PSK / PSS Series
Positive Switching Regulators
Electrical Output Data
General conditions:
– TA = 25 °C, unless TC is specified
– R-input open (or Vo set to Vo nom with option P)
Table 3a: Output data of PSS models
Output
PSS5A12
PSS1212
PSS12121
Unit
Characteristics
Conditions
min
typ
max
min
typ
max
min
typ
max
Vo
Output voltage
Vi nom, Io nom
Vi min – Vi max
TC min – TC max
Vi nom, Io nom
5.07
0
5.13
12
11.93
0
12.07 14.91
15.09
12
V
A
Io
Output current
12
15
0
IoL
Output current limitation
12
15
12
12
15
Output
voltage
noise
Switching freq.
20
24
40
44
20
45
30
34
50
54
Vo
mVpp
IEC/EN 61204
BW = 20 MHz
Total incl. spikes
29
49
∆Vo V Static line regulation
∆Vo l Static load regulation
Voltage
Vi min – Vi max, Io nom
Vi nom, Io = 0 – Io nom
Vi nom
Io nom ↔ 1/3 Io nom
IEC/EN 61204
Vi min – Vi max
15
10
35
25
40
30
70
50
35
80
55
50
mV
µs
Dynamic
load
Vo d
70
140
60
150
60
deviation
regulation
td
Recovery time
40
±1
±0.02
±3
±4 mV/K
Temperature coefficient
∆Vo/∆TC (TC min to TC max
αVo
)
Io = 0 – Io nom
±0.02
±0.02 %/K
1 Output set to 15 V with R-input.
Table 3b: Output data of PSS models. General conditions as per table 3a
Output
PSS2412
PSS2414
PSS3612
Unit
max
Characteristics
Conditions
min
typ
max
min
typ
max
min
typ
Vo
Output voltage
Vi nom, Io nom
Vi min – Vi max
TC min – TC max
Vi nom, Io nom
23.86
0
24.14
12
23.2
0
24.7
14
35.78
0
36.22
12
V
A
Io
Output current
IoL
Output current limitation
12
15
14
17.5
12
15
Output
voltage
noise
Switching freq.
30
34
40
44
300
310
35
60
64
Vo
mVpp
IEC/EN 61204
BW = 20 MHz
Total incl. spikes
39
∆Vo V Static line regulation
∆Vo l Static load regulation
Voltage
Vi min – Vi max, Io nom
Vi nom, Io = 0 – Io nom
Vi nom
Io nom ↔ 1/3 Io nom
IEC/EN 61204
Vi min – Vi max
80
50
35
25
480
240
120
60
250
200
mV
µs
Dynamic
load
Vo d
180
60
700
200
deviation
regulation
td
Recovery time
60
70
±5
±5
±8 mV/K
Temperature coefficient
∆Vo/∆TC (TC min to TC max
αVo
)
Io = 0 – Io nom
±0.02
±0.02
±0.02 %/K
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PSK / PSS Series
Positive Switching Regulators
Table 3c: Output data of PSS models. General conditions as per table 3a
Output
PSS129
PSS1291
PSS249
Unit
Characteristics
Conditions
min
typ
max
min
typ
max
min
typ
max
Vo
Output voltage
Vi nom, Io nom
Vi min – Vi max
TC min – TC max
Vi nom, Io nom
11.93
12.07 14.91
15.09 23.86
24.14
9
V
A
Io
Output current
0
9
0
9
0
IoL
Output current limitation
9
11.25
19
11.25
9
11.25
Output
voltage
noise
Switching freq.
25
50
54
20
34
45
64
30
50
65
Vo
mVpp
IEC/EN 61204
BW = 20 MHz
Total incl. spikes
29
39
∆Vo V Static line regulation
∆Vo l Static load regulation
Voltage
Vi min – Vi max, Io nom
Vi nom, Io = 0 – Io nom
Vi nom
Io nom ↔ 1/3 Io nom
IEC/EN 61204
Vi min – Vi max
40
30
70
50
40
80
60
80
50
170
50
120
mV
µs
Dynamic
load
Vo d
140
60
140
60
180
60
deviation
regulation
td
Recovery time
±3
±4
±5 mV/K
Temperature coefficient
∆Vo/∆TC (TC min to TC max
αVo
)
Io = 0 – Io nom
±0.02
±0.02
±0.02 %/K
1 Output set to 15 V with R-input.
Table 3d: Output data of PSS models. General conditions as per table 3a
Output
PSS369
PSS489
Unit
Characteristics
Conditions
min
typ
max
min
typ
max
Vo
Output voltage
Vi nom, Io nom
Vi min – Vi max
TC min – TC max
Vi nom, Io nom
35.78
36.22 47.71
48.29
9
V
A
Io
Output current
0
9
0
IoL
Output current limitation
9
11.25
9
11.25
Output
voltage
noise
Switching freq.
35
60
64
35
60
64
Vo
mVpp
IEC/EN 61204
BW = 20 MHz
Total incl. spikes
39
39
∆Vo V Static line regulation
∆Vo l Static load regulation
Voltage
Vi min – Vi max, Io nom
Vi nom, Io = 0 – Io nom
Vi nom
Io nom ↔ 1/3 Io nom
IEC/EN 61204
Vi min – Vi max
120
60
250
120
150
350
150
70
mV
µs
Dynamic
load
Vo d
200
200
deviation
regulation
td
Recovery time
70
70
±5
±0.02
±4 mV/K
Temperature coefficient
∆Vo/∆TC (TC min to TC max
αVo
)
Io = 0 – Io nom
±0.02 %/K
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PSK / PSS Series
Positive Switching Regulators
Table 4a: Output data of PSK models. General conditions as per table 3a
Output
PSK5A16
PSK5A20
PSK5A25
Unit
Characteristics
Conditions
min typ max min typ max min typ max
Vo
Output voltage
Vi nom, Io nom
Vi min – Vi max
TC min – TC max
Vi nom, Io nom
5.07
0
5.13 5.07
5.13 5.07
5.13
25
V
A
Io
Output current
16
20
0
20
25
0
IoL
Output current limitation
16
20
25
31.5
Output
voltage
noise
Switching freq.
20
24
40
44
20
24
40
44
20
24
40
44
Vo
mVpp
IEC/EN 61204
BW = 20 MHz
Total incl. spikes
∆Vo V Static line regulation
∆Vo l Static load regulation
Voltage
V
i min – Vi max, Io nom
15
10
35
25
15
10
35
25
15
10
35
25
Vi nom, Io = 0 – Io nom
mV
µs
Vi nom
Dynamic
load
Vo d
70
70
70
deviation
Io nom ↔ 1/3 Io nom
IEC/EN 61204
Vi min – Vi max
Io = 0 – Io nom
regulation
td
Recovery time
40
40
40
±1
±0.02
±1
±0.02
±1 mV/K
Temperature coefficient
∆Vo/∆TC (TC min to TC max
αVo
)
±0.02 %/K
Table 4b: Output data of PSK models. General conditions as per table 3a
Output
PSK1216
PSK1220
PSK12161
PSK12161
Unit
Characteristics
Conditions
i nom, Io nom
i min – V
min typ max
min typ max min typ max
min typ max
Vo
Output voltage
V
11.93
0
12.07 11.93
12.07 14.91
15.09 14.91
15.09
20
V
A
Io
Output current
V
16
20
0
20
25
0
16
20
0
i max
IoL
Output current limitation
16
20
16
20
25
TC min – TC max
i nom, Io nom
V
Output
voltage
noise
Switching freq.
Total incl. spikes
25
45
25
45
30
34
50
54
30
34
50
54
Vo
mVpp
IEC/EN 61204
BW = 20 MHz
29
49
29
49
∆Vo V Static line regulation
∆Vo l Static load regulation
Voltage
V
i min – Vi max, Io nom
40
30
70
40
30
70
50
35
80
55
50
35
80
55
Vi nom, Io = 0 – Io nom
50
50
mV
µs
V
i nom
Dynamic
load
Vo d
140
60
140
60
150
60
150
60
deviation
Io nom ↔ 1/3 Io nom
regulation
td
Recovery time
IEC/EN 61204
V
i min – V
±3
±0.02
±3
±0.02
±4
±0.02
±4 mV/K
Temperature coefficient
∆Vo/∆TC (TC min to TC max
i max
αVo
)
Io = 0 – Io nom
±0.02 %/K
1 Output set to 15 V with R-input.
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PSK / PSS Series
Positive Switching Regulators
Table 4c: Output data of PSK models. General conditions as per table 3a
Output
PSK2416
typ max
PPSK2420
PSK3616
PSK3620
typ max
Unit
min
min typ max
min
typ
max
min
Characteristics
Conditions
i nom, Io nom
i min – V
23.86
0
24.14 23.86
24.14 35.78
36.22 35.78
36.22
20
Vo
Output voltage
V
V
A
Io
Output current
V
16
20
0
20
25
0
16
20
0
i max
IoL
Output current limitation
16
20
16
20
25
TC min – TC max
i nom, Io nom
V
Output
30
34
60
64
30
34
60
64
35
60
64
35
60
64
Switching freq.
Total incl. spikes
Vo
voltage
noise
mVpp
IEC/EN 61204
BW = 20 MHz
39
39
80
50
170
80
50
170
120
60
250
120
120
60
250
120
∆Vo V Static line regulation
∆Vo l Static load regulation
Voltage
V
i min – Vi max, Io nom
120
120
Vi nom, Io = 0 – Io nom
mV
µs
V
i nom
Dynamic
180
60
500
200
200
Vo d
deviation
load
Io nom ↔ 1/3 Io nom
regulation
2000
70
70
td
Recovery time
IEC/EN 61204
V
i min – V
±5
±0.02
±5
±0.02
±8
±8 mV/K
±0.02
Temperature coefficient
∆Vo/∆TC (TC min to TC max
i max
αVo
)
±0.02
Io = 0 – Io nom
%/K
Table 4d: Output data of PSK models. General conditions as per table 3a
Output
PSK1212
PSK12121
PSK2412
Unit
Characteristics
Conditions
i nom, Io nom
i min – V
min
typ
max
min
typ
max
min
typ
max
Vo
Output voltage
V
11.93
0
12.07 14.91
15.09 23.86
24.14
12
V
A
Io
Output current
V
12
15
0
12
15
0
i max
IoL
Output current limitation
12
12
12
15
TC min – TC max
i nom, Io nom
V
Output
voltage
noise
Switching freq.
Total incl. spikes
25
50
54
30
34
60
64
35
60
65
Vo
mVpp
IEC/EN 61204
BW = 20 MHz
29
39
∆Vo V Static line regulation
∆Vo l Static load regulation
Voltage
V
i min – Vi max, Io nom
40
30
70
50
40
80
60
80
50
170
Vi nom, Io = 0 – Io nom
50
120
mV
µs
V
i nom
Dynamic
load
Vo d
140
60
140
60
180
60
deviation
Io nom ↔ 1/3 Io nom
regulation
td
Recovery time
IEC/EN 61204
V
i min – V
±3
±0.02
±4
±0.02
±5 mV/K
Temperature coefficient
∆Vo/∆TC (TC min to TC max
i max
αVo
)
Io = 0 – Io nom
±0.02 %/K
1 Output set to 15 V with R-input.
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PSK / PSS Series
Positive Switching Regulators
Table 4e: Output data of PSK models. General conditions as per table 3a
Output
PSK3612
PSK4812
Unit
Characteristics
Conditions
i nom, Io nom
i min – V
min
typ
max
min
typ
max
Vo
Output voltage
V
35.78
0
36.22 47.71
48.29
12
V
A
Io
Output current
V
12
15
0
i max
IoL
Output current limitation
12
12
15
TC min – TC max
i nom, Io nom
V
Output
voltage
noise
Switching freq.
Total incl. spikes
35
60
64
35
60
64
Vo
mVpp
IEC/EN 61204
BW = 20 MHz
39
39
∆Vo V Static line regulation
∆Vo l Static load regulation
Voltage
V
i min – Vi max, Io nom
120
60
250
120
150
350
150
Vi nom, Io = 0 – Io nom
70
mV
µs
V
i nom
Dynamic
load
Vo d
200
200
deviation
Io nom ↔ 1/3 Io nom
regulation
td
Recovery time
70
70
IEC/EN 61204
V
i min – V
±5
±0.02
±4 mV/K
Temperature coefficient
∆Vo/∆TC (TC min to TC max
i max
αVo
)
Io = 0 – Io nom
±0.02 %/K
Output Voltage Regulation
The dynamic load regulation is shown in fig. 3:
Vo
Vod
Vo ±1ꢀ
Vo ±1ꢀ
Vod
td
td
t
t
Io/Io nom
1
0.5
≥ 10 µs
≥ 10 µs
0
05102c
Fig. 3
Dynamic load regulation.
Current Limitation
A constant current limitation circuit holds the output current Io almost constant in the area of 100 to 120% of Io nom, when an overload
or a short-circuit is applied to the output. It acts self-protecting and recovers – in contrary to the fold back method – automatically
after removal of the overload or short-circuit condition.
Vo/Vo nom
05038a
1.0
0.8
Io L
0.6
0.4
0.2
0
0.2
0.4
0.6
0.8
1.0
1.2 Io/Io nom
Fig. 4
Overload, short-circuit behavior Vo versus Io.
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PSK / PSS Series
Positive Switching Regulators
Output Protection
A voltage suppressor diode, which in worst case conditions fails into a short-circuit, protects the output against an internally
generated overvoltage. Such an overvoltage could occur due to a failure of either the control circuit or the switching transistor. The
output protection is not designed to withstand externally applied overvoltages.
Parallel and Series Connection
Outputs of equal nominal voltage may be parallel-connected. Interconnect the current sharing pins T (pin 22) for even distribution
of the output current; see Auxiliary Functions.
Outputs can be series-connected with any other regulator, provided that the regulators are powered by electrically isolated source
voltages. In series connection the maximum output current is limited by the lowest current limitation.
Thermal Considerations and Protection
When a switching regulator is located in free, quasi-stationary air (convection cooling) at a temperature TA max and is operated at its
nominal output current Io nom, the case temperature TC can rise over TC max after the warm-up phase. TC is measured at the measuring
point of case temperature; see Mechanical Data.
Under practical operating conditions, the ambient temperature TA may exceed TA max, provided that additional measures (heat sink,
forced cooling, etc.) are taken to ensure that the case temperature TC does not exceed its maximum value.
The regulator is protected by an internal temperature sensor, which inhibits the output above TC max. The output automatically
recovers, when the temperature drops below TC max
.
Io/Io nom
Io/Io nom
05032a
05031a
1.0
1.0
0.ꢁ
0.8
0.ꢀ
0.6
0.5
0.4
0.3
0.2
0.1
0.ꢂ
forced
cooling
forced
cooling
0.8
0.ꢀ
0.6
0.5
0.4
0.3
0.2
0.1
0
convection cooling
convection cooling
TC max
TC max
TA
0
TA
TA min
Fig. 5a
Output current derating versus temperature (models -2)
40
60
ꢀ0
80 ꢁC
TA min
50
60
ꢀ0
80
ꢁ0
ꢂC
50
Fig. 5b
Output current derating versus temp. (models -7 or -9)
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PSK / PSS Series
Positive Switching Regulators
Auxiliary Functions
Inhibit (Remote On / Off)
The inhibit input allows to enable or disable the output with a control signal. In systems with several regulations, this feature can
be used to control the activation sequence of the regulators by a logic signal (TTL, C-MOS, etc.). An output voltage overshoot will
not occur, when switching on or off.
The inhibit signal is referenced to the S– (pin 18). The signal i and the switching times are specified in table 5, fig. 6 to 8.
Note: With open i input, the output is enabled.
Table 5: Inhibit characteristics
0600ꢁa
Vo+
i
Vi+
ꢀi–
Characteristics
Conditions
min typ max Unit
Iinh
Vinh
Vinh Inhibit input Vo = on Vi min – Vi max
- 50
+0.8
+50
V
voltage
Vo = off
+2.4
TC min – TC max
tr
tf
Switch-on time
Switch-off time
Vi = Vi nom
130
25
ꢀo–
ms
RL = Vo nom / Io nom
Ii inh Input current when
Vi = Vi nom
25
Fig. 6
mA
inhibited
Specification of the inhibit signal (typical)
Iinh ꢀmAꢁ
Vo/Vo nom
06034a
06001
5
4
3
1
0.1
0
t
t
tf
tr
2
Output off
Output on
Inhibit
1
1
0
0
Vinh
–20
–40
0
20
40
V
Fig. 7
Fig. 8
Specification of the inhibit signal (typical)
Output response as a function of the inhibit signal
Sense Lines
This feature enables compensation of the voltage drop across the connector contacts and the load lines. If the sense lines are
connected at the load rather than directly at the connector, the user must ensure that Vo max (between Vo+ and Go–) is not exceeded.
Applying generously dimensioned cross-section load leads reduces the voltage drop. To minimize noise pick-up, the sense lines
should be wired in parallel or twisted.
To ensure correct operation, both sense lines must be connected to their respective power output. The voltage difference between
any sense line and its respective power output pin (as measured on the connector) should not exceed the values given in table 6.
Note: Sense lines should always be connected! It is recommended to connect the sense lines directly at the female connector.
Table 6: Allowed voltage compensation using sense lines
06046a
Vi+
i
Nominal output
voltage
Total voltage difference
between both sense lines
and their respective output
Voltage difference
between
Vo+
S+
Go– and S–
Load
R
3.3 V, 5.1 V
12 – 48 V
≤ 0.5 V
≤ 1.0 V
≤ 0.25 V
≤ 0.25 V
S–
T
Go–
Gi–
Fig. 9
Sense lines connection
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PSK / PSS Series
Positive Switching Regulators
Current Sharing
For parallel operation of several regulators, interconnect all T-pins to ensure that the output currents are evenly distributed. This
feature improves transient load performance and increases system reliability. All paralleled regulators should be supplied by equal
input voltage (Vi). The output lines should exhibit equal length and cross section to provide equal voltage drop.
R Control (Output Voltage Adjust)
Note: With open R input, Vo ≈ Vo nom
.
The output voltage Vo can either be adjusted with an external voltage source (Vext) or with an external resistor (Rext1 or Rext2). The
adjustment range is approx. 0 – Vo max. The minimum differential voltage ΔVio min between input and output (see Electrical Input Data)
should be maintained.
a) Vo = 0 – Vo max, using Vext between R and S–:
V
Vext
–––o––
–––––
Vext ≈ 2.5 V •
Vo ≈ Vo nom •
Vo nom
2.5 V
ꢂM154
Vi+
S+
R
Caution: To prevent damage Vext should not exceed 20 V, nor be
negative.
Rext2
4 kΩ
V
ref ꢁ 2.5 V
b) Vo = 0 to Vo nom, using Rext1 between R and S–:
+
+
–
Control
logic
Vext
Rext1
4000 Ω • Vo
–––––––––––
Vo nom – Vo
Vo nom • Rext1
–––––––––––
Vo ≈
Rext1
≈
S–
R1 + 4000 Ω
ꢀi–
ꢀo–
c) Vo = Vo nom to Vo max, using Rext2 between R and S+:
4000 Ω • Vo • (Vo nom – 2.5 V)
Fig. 10
–––––––––––––––––––––––––––––––––
≈
Rext2
Voltage adjustment via R-input
2.5 V • (Vo – Vo nom)
Vo nom • 2.5 V • Rext2
––––––––––––––––––––––––––––––––––––––––
Vo ≈
2.5 V • (R2 + 4000 Ω) –Vo nom • 4000 Ω
Caution: Rext should never be less than 47 kΩ.
Table 7: Maximum adjustable output voltage
Vo nom
Nominal Output
Voltage
Conditions
3.3 V
min typ
5.1 V
min typ
5.5
12/15 V
min typ
16
24 V
min typ
26
36 V
min typ
42.5
48 V
Unit
min
typ
Vo max
Max. adjustable output Vi nom, Io nom
52.8
V
voltage with R-input
Test Sockets
Test sockets (pin ∅ = 2 mm) for measuring the output voltage Vo at the sense lines, are located at the front side of the regulator.
The test sockets are protected by a series resistor.
LED Output Voltage Indicator
A green LED indicator shines when the output voltage is present.
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PSK / PSS Series
Positive Switching Regulators
Electromagnetic Compatibility (EMC)
Electromagnetic Immunity
General condition: Case earthed.
Table 8: Immunity type tests
Phenomenon
Standard
Level Coupling mode
Value
applied
Waveform
Source Test procedure
imped.
In
Perf.
oper. crit.2
Direct transients2
IEC 60571-1
800 Vp
100 µs
50 µs
5 µs
1 positive and
1500 Vp
3000 Vp
4000 Vp
7000 Vp
1 negative surge
per coupling
mode
2
i/c, +i/–i
100 Ω
yes
B
A
1 µs
100 ns
Electrostatic
discharge (to case) 61000-4-2
IEC/EN
contact discharge 6000 Vp
10 pos. & 10 neg.
discharges
4 2
1/50 ns
330 Ω
yes
yes
air discharge
antenna
8000 Vp
Electromagnetic
field
IEC/EN
61000-4-3
3 2
2 3
10 V/m 2
3 V/m 3
AM 80% / 1 kHz
N/A
N/A
80 – 1000 MHz
900 ± 5 MHz
A
A
50% duty cycle,
200 Hz rep. rate
3 2
antenna
10 V/m
2
3 2
2 3
2000 Vp
1000 Vp
Electrical fast
transients / burst
IEC/EN
61000-4-4
burstsof 5/50ns;
5 kHz repet. rate;
transients with 15 ms
burst duration;
60 s positive
60 s negative
transients per
coupling mode
A
3
i/c, +i/–i
50 Ω
yes
2
3
4 2
3 3
4000 Vp
2000 Vp
B 5
300 ms period
2
3
Surges
IEC/EN
61000-4-5
3 2
2 3
2000 Vp
1000 Vp
5 pos. & 5 neg.
surges per
coupling mode
i/c
+i/–i
12 Ω
2 Ω
1.2 / 50 µs
yes
yes
A
A
2
3 2
1 3
1000 Vp
3
500 Vp
Conducted
disturbances
IEC/EN
61000-4-6
3 2
2 3
10 VAC 2
3 VAC 3
i, o, signal wires
AM 80% / 1 kHz
150 Ω 0.15 – 80 MHz
1
i = input, o = output, c = case
Not applicable for -2 models
Valid for -2 models
2
3
4
A = Normal operation, no deviation from specifications, B = Normal operation, temporary loss of function or deviation from specs possible
With option C, manual reset might be necessary.
5
Electromagnetic Emission
Limit: 61204bqp Detector: Peak, conducted Vi+, EMC-Service Divina, 2009-12-09
dBµV
EMC-Service Divina, ESVS 30:R&S, BBA 9106/UHALP 9107:Schwarzb., QP, 2009-12-02
Testdistance 10 m, PSK24Z10A-7EC U =66 V, U =24 V I = 10 A
PSK2412-9, U
= 110 Vdc, U
= 24 V, I
= 10 A
i
o
o
JM153
dBµV/m
50
i
o
o
80
EN 55011 A
EN 55011 Group 1 Class A qp
EN 55011 Group 1 Class A pk
40
60
40
20
0
30
20
10
0
0.2
0.5
1
2
5
10
20 MHz
30
50
100
200
500
1000 MHz
Fig. 11
Fig. 12
Typical conducted disturbance voltage (quasi-peak & average)
according to EN 55011 Group 1, Class A,
measured at Vi nom = 110 V and Io = 10 A (PSK2412-9).
Typ. radiated disturbance voltage (quasi-peak) in 10 m
distance according to EN 55011 Group 1, Class A,
measured at Vi nom = 110 V and Io = 10 A (PSK2412-9).
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PSK / PSS Series
Positive Switching Regulators
Immunity to Environmental Conditions
Table 9: Mechanical and climatic stress
Test method
Standard
Test Conditions
Temperature:
Status
Cab Damp heat
steady state
IEC/EN 60068-2-78
MIL-STD-810D section 507.2
40±2 °C
Regulator not
operating
Relative humidity:
Duration:
93+2/-3
%
56 days
55°C and25°C
2
Db
Damp heat test,
cyclic2
EN 50155:2007, clause 12.2.5
IEC/EN 60068-2-30
Temperature:
Regulator not
operating
Cycles (respiration effect):
Duration:
2x 24 h
35±2 °C
Ka
Ea
Salt mist test
(sodium chloride
NaCl solution)
EN 50155:2007, clause 12.2.10 Temperature:
IEC/EN 60068-2-11, class ST2
Regulator not
operating
Duration:
16 h
Shock
IEC/EN 60068-2-27
MIL-STD-810D section 516.3
Acceleration amplitude:
50 gn = 490 m/s2
11 ms
Regulator
operating
(half-sinusoidal)
Bump duration:
Number of bumps:
Acceleration amplitude:
Bump duration:
18 (3 in each direction)
25 gn = 245 m/s2
11 ms
Eb
Bump
(half-sinusoidal)
IEC/EN 60068-2-29
MIL-STD-810D section 516.3
Regulator
operating
Number of bumps:
6000 (1000 in each direction)
Fda Random vibration
wide band
IEC/EN 60068-2-35
DIN 40046 part 23
Acceleration spectral density: 0.05 gn2/Hz
Frequency band:
20 to 500 Hz
Regulator
operating
Reproducibility high
Acceleration magnitude:
Test duration:
4.9 gn
rms
3 h (1 h in each axis)
5.1 gn
-
-
Shock
EN 50155:2007 clause 12.2.11
EN 61373 sect. 10, class B,
body mounted1
Acceleration amplitude:
Bump duration:
Regulator
operating
30 ms
Number of bumps:
18 (3 in each direction)
Simulated long life
testing at increased
random vibration
levels
EN 50155:2007 clause 12.2.11
EN 61373 sect. and 9,
Acceleration spectral density: 0.02 gn2/Hz
Frequency band:
Acceleration magnitude:
Test duration:
5 to 150 Hz
Regulator
operating
class B, body mounted1
0.8 gn
rms
15 h (5 h in each axis)
1
2
Body mounted = chassis of a railway coach
Models with version V104 or later
Temperatures
Table 10: Temperature specifications, valid for air pressure of 800 to 1200 hPa (800 to 1200 mbar)
Temperature
-2
-7
-9 (Option)
typ
Unit
Characteristics
Conditions
min
- 10
- 10
- 25
typ
max
50
min
- 25
- 25
- 40
typ
max
71
min
- 40
- 40
- 55
max
TA
TC
TS
1
Ambient temperature 1 Regulator operating1
71
Case temperature
85
95
95
° C
Storage temperature1 Not operational
85
85
85
See Thermal Considerations and Overtemperature Protection.
Reliability
Table 11: Typical MTBF and device hours
MTBF
Ground benign
Ground fixed
Ground mobile
TC = 50 °C
Device hours1
Case temperature
MTBF accord. to MIL-HDBK-217F
TC = 40 °C
TC = 40 °C
TC = 70 °C
335 000 h
138 000 h
35 000 h
33 000 h
2 100 000 h
1
Statistical values, based on an average of 4300 working hours per year and in general field use
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PSK / PSS Series
Positive Switching Regulators
Mechanical Data
PSS Models
The regulators are designed to be inserted into a rack according to IEC 60297-3. Dimensions in mm.
European
Projection
ꢀ TE
30.3
5 TE
3.2ꢀ
ꢀ.04
1ꢀ1.0 to 1ꢀ1.ꢁ
10.34
ꢀ6
8
50
0ꢁ028b
4 x M4
LED OK green
Potentiometer
(option P)
+
–
Test sockets
Measuring point of
case temperature TC
152
2ꢀ.38
d
60
Back plate
Front plate
Main face
168.5 ±0.5
Ø 5 x ꢁ0ꢂ
Ø 2.8
Screw holes of the
frontplate
Fig. 13
Case S01 for PSS models; weight 1.3 kg
Aluminum, fully enclosed, black finish EP power-coated, and self cooling.
Notes:
– d ≥15 mm, recommended minimum distance to next part to ensure proper air circulation at full output power.
– Free air locations: the regulator should be mounted with its fins in vertical position to achieve a maximum air flow through heat sink.
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PSK / PSS Series
Positive Switching Regulators
PSK Models
The regulators are designed to be inserted into a DIN-rack according to IEC 60297-3. Dimensions in mm.
European
Projection
ꢁ TE
30.3
ꢀ TE
3.2ꢁ
ꢁ.04
15ꢀ
4.5
10.34
0ꢀ02ꢀb
LED OK green
Potentiometer
(option P)
+
–
Test sockets
Measuring point of
case temperature TC
50
2ꢁ.38
1ꢁ1.0 to 1ꢁ1.ꢀ
80
d
Back plate
Main face
Front plate
168.5
5 x ꢀ0ꢂ
2.8
Screw holes of the
frontplate
Fig. 14
Case K01 for PSK models, weight 1.6 kg
Aluminum, fully enclosed, black finish EP powder-coated, and self cooling.
Notes:
– d ≥15 mm, recommended minimum distance to next part to ensure proper air circulation at full output power.
– Free air locations: the regulator should be mounted with its fins in vertical position to achieve a maximum air flow through heat sink.
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PSK / PSS Series
Positive Switching Regulators
Option B, B1
5
6.5
4ꢀ.2
European
Projection
1102ꢀ
38.5
11.8
1ꢀ.3
133.4 ±0.2
168
30
Fig. 15
Option B, large cooling plate
Weight: 1.3 kg
5
4ꢀ.2
38.5
5
158
11.8
11028
M 4
168 ±0.5
1ꢀ1.ꢁ
Fig. 16
Option B1, small cooling plate
Weight: 1.2 kg
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PSK / PSS Series
Positive Switching Regulators
Safety and Installation Instructions
Connector Pin Allocation
The connector pin allocation table defines the electrical potentials and the physical pin positions on the H15 or H15S4 connector.
Pin 24 (protective earth) is a leading pin, which provides electrical contact first. The regulators should only be wired via the female
connector H15 (according to DIN 41612) to ensure requested safety!
10010a
Table 12: H15 and H15S4 connector pin allocation
Fixtures for connector
Electrical Determination
Type H15
Type H15S4
retention clips V
Pin Ident.
no.
Pin
no.
Ident.
(see Accessories)
Output voltage (positive
Output voltage (positive)
Output voltage (negative)
Output voltage (negative)
4
6
Vo+
Vo+
Go-
Go-
4/6
Vo+
8
32
4
8/10
Go-
10
Type H15
Crowbar trigger input (option C)
Inhibit input
12
14
C
i
12
14
16
18
20
22
C
i
R-input (output voltage programming) 16
R
S-
S+
T
R
S-
S+
T
Fixtures for connector
retention clips V
(see Accessories)
Sense line (negative)
Sense line (positive)
18
20
22
Current sharing control input
Protective ground (leading pin)
Input voltage (negative)
Input voltage (negative)
Input voltage (positive)
Input voltage (positive)
24
26
28
30
32
24
Gi-
Gi-
Vi+
Vi+
Gi-
26/28
30/32
30/32
4/6
Type H15S4
Vi+
Fig. 17
View of H15 and H15S4 male connector
Installation Instruction
Installation of the regulators must strictly follow the national safety regulations in compliance with the enclosure, mounting,
creepage, clearance, casualty, markings, and segregation requirements of the end-use application.
The input and the output circuit are not separated. The negative path is internally interconnected.
The regulators should be connected to a secondary circuit. Make sure that a regulator failure (e.g. by an internal short-circuit)
does not result in a hazardous condition.
Do not open the regulator!
Standards and Approvals
The regulators are safety-approved to UL/CSA60950-1 2nd Ed. and IEC/EN 60950-1 2nd Ed. They correspond to Class I equipment
(with case connected to ground).
The regulators have been evaluated for:
• Building in
• No insulation from input to output.
• The use in a pollution degree 2 environment
• Connecting the input to a secondary circuit, which is subject to a maximum transient rating of 1500 V.
The switching regulators are subject to manufacturing surveillance in accordance with the above mentioned standards and with
ISO 9001:2015.
Cleaning Liquids
In order to avoid possible damage, any penetration of cleaning fluids must be prevented, since the regulators are not hermetically sealed.
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PSK / PSS Series
Positive Switching Regulators
Protection Degree
The protection degree is IP 30. It applies only, if the regulator is plugged-in or the matching female connector is properly attached.
Isolation and Protective Earth
The resistance of the protective earth connection (max. 0.1 Ω) is tested. The electric strength between input interconnected with
output and case is tested with 1500 VDC ≥1 s (all models with version V103 or later). Models with Vi max = 144 V and V104 or later
are tested with 2200 VDC ≥1 s.
These tests are performed in the factory as routine test in accordance with EN 50116 and IEC/EN 60950. The electric strength
test should not be repeated by the customer. BelPS Company does not honor warranty claims resulting from incorrect executed
electric strength tests.
Railway Application
The regulators have been developed observing the railway standards EN 50155 and EN 50121. All boards are coated with a
protective lacquer.
Description of Options
-7 Temperature Range
This option defines a restricted temperature range as specified in table 10 (not for new designs).
E
Inrush Current Limitation
Note: This option requires an increased minimum input voltage Vi max of up to 1 V, dependent upon input range.
In regulators without option E, after application of the input supply the inrush current is limited by parasitic components of the voltage
source and the regulator input only. The regulator input exhibits a very low impedance, and when driven from a low impedance
source, for example a battery, the inrush current can peak at several orders of magnitude above the continuous input current.
Option E dramatically reduces this peak current and is recommended for any application to protect series elements such as fuses,
switches, or circuit breakers. The start-up circuit is bypassed during normal operation.
ꢀ ꢀAꢁ
1102ꢃa
Inrush limit
Soft start
Normal operation
(R bypassed)
s
Vi
(
Ii ꢂ ––––
)
R
s
t
0
40 (typical)
100 (typical)
ms
Fig. 18
Option E: Inrush current versus time. Rs is the startup resistor (Rs = 1 Ω for models with Vi max ≤ 80 V, Rs = 15 Ω for models with Vi max > 80 V)
C
Thyristor Crowbar
Note: The crowbar can be reset by removal of the input voltage only. The inhibit signal cannot deactivate the thyristor.
Option C protects the load against power supply malfunction. It is not designed to sink external currents.
As a central overvoltage protection device, the crowbar is usually connected to the external load via distributed inductance of the
lines. For this reason, the overvoltage at the load can temporarily exceed the trigger voltage Vo c. Depending on the application,
further decentralized overvoltage protection elements may have to be used additionally.
A fixed-value monitoring circuit checks the output voltage Vo, and when the trigger voltage Vo c is reached, the thyristor crowbar
triggers and disables the output.
An external connection C (crowbar trigger control) is provided. When crowbar option is used with two or more power supplies
in parallel connection, all crowbar trigger terminals (C) should be interconnected. This ensures all crowbar circuits triggering
simultaneously, in order to disable all outputs at once. The crowbar trigger voltage is maintained between Vo+ and Go–. To prevent
false triggering, the user should ensure that Vo (between Vo+ and Go–) does not exceed Vo c.
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PSK / PSS Series
Positive Switching Regulators
Table 13: Crowbar trigger levels
Characteristics
Conditions PSK5A20-9ECKG
PSK1212
PSK1216
PSK1220
PSS249
PSK2412
PSK2416
PSK2420
PSK3612
PSK3616
PSK3620
PSK4812
Unit
min typ max min typ max min typ max min typ max min typ max
Vo c Trigger voltage TC min – TC max
Vi min – Vi max
6.3
1.5
6.7
17.8 18.9
28.9 30.6
47
50
63
67
V
tS
Delay time
1.5
1.5
1.5
1.5
µs
Io = 0 – Io nom
B, B1 Cooling Plate
Where a cooling surface is available, a cooling plate (option B or option B1) can be fitted instead of the standard heatsink. The
mounting system must ensure sufficient cooling capacity to guarantee that the maximum case temperature TC max is not exceeded.
The required cooling capacity can be calculated by the following formula:
100% – η
_________
PLoss
=
• (Vo • Io)
η
G
RoHS Compliance
Models with G are RoHS-compliant for all six substances.
Accessories
A variety of electrical and mechanical accessories are available including:
• Various front panels for 19" DIN-racks with 3U height, 12 or 16 TE, Schroff or Intermas
• DIN-rail mounting assembly HZZ0615-G; see fig. 20
• Various mating connectors H15 and H15S4 including fast-on, screw, solder, or press-fit terminals, code key system and
coding wedges HZZ00202-G
• Pair of connector retention clips HZZ01209-G; see fig. 22
• Connector retention brackets HZZ01216-G; see fig. 23
• Different cable connector housings (cable hoods), including a metallic version for fire protection
• Cage clamp adapter HZZ00144-G; see fig. 24
• Wall-mounting plate K02 HZZ01213, only for models with option B1
• Brackets for DIN-rail and wall mounting HZZ00610
• Battery sensors S-KSMH... for using the converter as battery charger. Different cell characteristics can be selected; see
Battery Charging/Temperature Sensor.
Fig. 19
Fig. 20
Different front panels
DIN-rail mounting assembly HZZ00615-G
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Page 21 of 22
PSK / PSS Series
Positive Switching Regulators
Fig. 21
Fig.22
H15 female connector with code key system
Connector retention clips HZZ01209-G
20 to 30 Ncm
Fig. 23
Fig. 24
Connector retention brackets HZZ01216-G
Cage clamp adapter HZZ00144-G
For additional accessory product information, see the accessory data sheets listed with each product series at our web site.
NUCLEAR AND MEDICAL APPLICATIONS - These products are not designed or intended for use as critical components in life support systems,
equipment used in hazardous environments, or nuclear control systems.
TECHNICAL REVISIONS - The appearance of products, including safety agency certifications pictured on labels, may change depending on the
date manufactured. Specifications are subject to change without notice.
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Page 22 of 22
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