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232266193175 [VISHAY]

PTC Thermistors, Overload Protection For Telecommunication; PTC热敏电阻，过载保护电信
232266193175
型号： 232266193175
厂家： VISHAY    VISHAY
描述：

PTC Thermistors, Overload Protection For Telecommunication
PTC热敏电阻，过载保护电信

电信 过载保护
文件： 总4页 (文件大小：69K)
中文：  中文翻译
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2322 66. 9....  
Vishay BCcomponents  
PTC Thermistors, Overload Protection  
For Telecommunication  
FEATURES  
PRIMARY  
PROTECTION  
(OPTIONAL)  
SECONDARY  
PROTECTION  
• Wide resistance range in telecom area 4... to 70 Ω  
• Fast protection against power contact faults  
• Withstand high overload currents of up to 10 A  
+θ  
+θ  
• High voltage withstanding capabilities for the larger sized  
thermistors  
PTC  
PTC  
SUBSCRIBER  
LOOP  
INTERFACE  
CIRCUIT  
(SLIC)  
OR  
TRANSFORMER  
subscriber  
lines  
voltage  
clamp  
• Good tracking over a wide temperature range for all  
matched or binned types  
+θ  
+θ  
• UL1434 approved types available (XGPU2)  
• Excellent stability over extended time  
PTC  
MDF  
• All telecom PTCs are coated with a high temperature  
silicon lacquer (UL94V0) to protect them from any harsh  
environments and to improve their lifetime.  
Typical telephone line showing where PTC thermistors  
can be used for overcurrent protection.  
APPLICATIONS  
• Main Distribution Frame (MDF)  
• Central Office Switching (C.O.)  
• Subscriber Terminal Equipment (T.E.)  
• Set-top box (S.B.).  
DESCRIPTION  
Advanced developments in telephony equipment in recent  
years have radically altered the protection requirements for  
both exchange and subscriber equipment. The Vishay  
BCcomponents range of Positive Temperature Coefficient  
(PTC) thermistors includes devices specially designed to  
provide overcurrent protection.  
MARKING  
Clear marking on a grey coated body.  
BC and R25 value.  
ELECTRICAL DATA AND ORDERING INFORMATION  
MAX.  
TRIP TIME  
NON-TRIP  
CURRENT  
TRIP  
CURRENT  
RESISTANCE  
V
MAX.  
(V)  
CATALOG  
NUMBER  
2322 ... .....  
MATCHED  
PAIRS  
APPLICATION  
AREA(1)  
°
at 25 C  
COMPATIBILITY  
Int  
at T  
R25  
TOL  
(%)  
It  
at T  
(mA) ( C)  
tt  
(s)  
at It  
(mA)  
°
Ω
°
(mA) ( C)  
( )  
220  
230  
245  
245  
245  
245  
245  
245  
250  
250  
250  
285  
300  
350  
350  
600  
600  
600  
600  
600  
600  
70  
100  
60  
75  
70  
70  
70  
70  
70  
70  
85  
55  
55  
40  
70  
70  
95  
70  
70  
70  
70  
70  
70  
70  
25  
25  
25  
10  
±20  
±20  
1 Ω  
1 Ω  
no  
±5%  
no  
2%  
no  
no  
1 Ω  
1 Ω  
no  
0.5 Ω  
no  
200  
250  
180  
150  
200  
200  
270  
270  
220  
175  
450  
400  
250  
270  
270  
140  
600  
170  
170  
400  
400  
25  
25  
25  
10  
25  
25  
25  
25  
25  
25  
0
25  
25  
25  
25  
25  
0
2.5  
3
1000  
1000  
220  
1000  
400  
C.O.  
MDF; ISDN  
C.O.  
K20/21  
K20/21  
661 93048  
661 93147  
661 93025  
661 93037  
661 93175  
661 93142  
662 93081  
662 93074  
661 93118  
661 93148  
663 93025  
661 93078  
661 93121  
661 93124  
661 93146  
661 93135  
661 93056  
661 93139  
662 93129  
662 93114(2)  
662 93131(2)  
70 +10/−15  
60  
1.2  
20  
3.40  
8
8
1
1.3  
−
−
33  
25  
25  
16  
10  
±20  
±15  
±20  
±20  
±20  
C.O.  
C.O.  
C.O.  
T.E.  
T.E.  
MDF  
K20/21; FTCSE I31-24  
K20/21  
K20/21; FTCSE I31-21  
K20/21; FTCSE I31-21  
−
65  
650  
140  
140  
100  
70  
100  
135  
100  
100  
100  
50  
70  
70  
70  
175  
175  
1000  
1000  
1000  
1000  
20 +10/−20  
25  
10  
8
±20  
±20  
±25  
±25  
±20  
±20  
±20  
±20  
±20  
±20  
±20  
±20  
MDF; C.O.  
T.E.  
MDF; ISDN  
MDF; T.E.  
T.E.; S.B.  
C.O.  
C.O.  
C.O.  
C.O.  
C.O.  
C.O.  
T.E.; S.B.  
K20/21  
K20/21  
K20/21  
K20/21  
K20/21  
K20/21  
K20/21  
K20/21  
0.30 8000  
6
2.0  
4.0  
4.0  
1
3
4
8
7
1000  
1000  
1000  
1000  
1000  
1000  
700  
700  
1000  
1000  
16  
10  
10  
50  
35  
25  
25  
10  
10  
no  
1 Ω  
1 Ω  
3 Ω  
2%  
2%  
0.5 Ω  
no  
25  
25  
25  
25  
K20/21  
K20/21  
UL1459/GR1089  
UL1459/GR1089  
7
Notes  
1. MDF: Main Distribution Frame; C.O.: Central Office Switching; T.E.: Subscriber Terminal Equipment; S.B.: Set-top Box.  
2. UL 1434 approved types.  
Document Number: 29070  
Revision: 10-Oct-03  
For technical questions contact: nlr.europe@vishay.com  
www.vishay.com  
163  
2322 66. 9....  
PTC Thermistors, Overload Protection  
For Telecommunication  
Vishay BCcomponents  
inrush power at normal mains voltage. Under such  
conditions, overload currents of up to 10 A on a 230 V mains  
could occur for up to several hours. To handle this power, the  
resistance/temperature characteristic of the thermistor must  
have a very steep slope and the ceramic must be extremely  
homogeneous.  
OVERCURRENT PROTECTION OF  
TELECOMMUNICATION LINES  
The PTC thermistor must protect the telephone line circuit  
against overcurrent which may be caused by the following  
examples:  
• Surges due to lightning strikes on or near to the line plant.  
In case of overcurrent due to short-term induction of  
alternating voltages, currents of several AMPs with voltages  
as high as 650 VRMS can be present for several seconds  
• Short-term induction of alternating voltages from adjacent  
power lines or railway systems, usually caused when these  
lines or systems develop faults.  
For standard high voltage applications, resistance values  
from 25 to 50 Ω are available. However, ISDN networks  
which carry high-frequency sound and vision, need lower line  
impedance.  
• Direct contact between telephone lines and power lines.  
To provide good protection under such conditions a PTC  
thermistor is connected in series with each line, usually as  
secondary protection; see Typical Telephone Line drawing  
on page 1. However, even with primary line protection  
(usually a gas discharge tube), the PTC thermistor must fulfil  
severe requirements.  
Telecommunication designers are therefore demanding high  
voltage thermistors with much lower R25 values, which  
places even greater demands on the manufacture of PTC  
thermistors. For these applications PTC thermistors which  
Surge pulses of up to 2 kV can occur and in order to  
withstand short-term power induction the PTC thermistor  
must withstand high voltages. If the line has primary  
protection a 220 V to 300 V PTC thermistor is adequate.  
Without primary protection, however, a 600 V PTC device is  
necessary. Vishay BCcomponents manufacturers a range of  
PTC thermistors (see Electrical Data and Ordering  
Information Table ) covering both requirements.  
have  
a
R25 value of 10 Ω with voltages in the  
300 to 600 VRMS range are available.  
In a typical telephone line application, two PTC thermistors  
are used, one each for the tip and ring (or A and B) wire  
together with their series resistors. For good line balance it is  
important that the thermistor and resistor pairs are matched.  
On request, Vishay BCcomponents can supply matched or  
binned PTC thermistors with R25 values matched to as close  
as 0.5 Ω.  
In the case of direct contact between the telephone line and  
a power line, the PTC thermistor must withstand very high  
DIMENSIONS in millimeters  
T
T
D
D
COMPONENT OUTLINE  
H
3
H
L
2
For dimensions see Specific Physical  
Dimentions and Packaging table.  
F
1
Lead pitch F = 5 mm +0.6/-0.1.  
d
Lead thickness d = 0.6 mm 10%.  
SPECIFIC PHYSICAL DIMENSIONS AND PACKAGING in millimeters  
CATALOG  
NUMBER  
2322 ... .....  
D
MAX.  
T
H3  
MAX.  
PACKAGING(1)(2)  
H2  
L1  
MAX.  
7.0  
8.5  
7.0  
6.7  
7.0  
8.3  
6.8  
11  
4.0  
5.0  
4.0  
4.0  
5.0  
4.0  
4.3  
4.5  
4.5  
1.8  
4.0  
6.0  
5.0  
3.5 ±0.5  
1.5 to 3.0  
2.0 ±0.5  
1.5 to 3.0  
1.5 to 3  
1.5 to 3.0  
1.5 to 3.0  
4.0 ±1.0  
4.0 ±1.0  
−
−
−
−
−
−
−
−
−
11.0  
11.5  
9.8  
10.0  
10.0  
11.0  
10.1  
15.5  
15.5  
−
taped H0 = 16 mm  
taped H0 = 16 mm  
taped H0 = 18 mm  
taped H0 = 18 mm  
taped H0 = 16 mm  
taped H0 = 18 mm  
taped H0 = 16 mm  
taped H0 = 16 mm  
taped H0 = 16 mm  
disc on tray  
661 91066  
661 93048  
661 93147  
661 93025  
661 93037  
661 93175(3)  
661 93142  
662 93081  
662 93074(3)  
661 93118  
661 93148  
663 93025(3)  
661 93078  
11  
−
−
−
6.7  
7.0  
13.6  
8.3  
2.0 ±0.5  
4.0 ±1.0  
1.5 ±0.5  
9.8  
18.6  
10.3  
taped H0 = 18 mm  
bulk  
20 ±4.0  
20 ±3.0  
bulk  
www.vishay.com  
164  
For technical questions contact: nlr.europe@vishay.com  
Document Number: 29070  
Revision: 10-Oct-03  
2322 66. 9....  
Vishay BCcomponents  
PTC Thermistors, Overload Protection  
For Telecommunication  
CATALOG  
NUMBER  
2322 ... .....  
D
MAX.  
T
H3  
MAX.  
PACKAGING(1)(2)  
H2  
L1  
MAX.  
7.0  
8.5  
8.5  
8.5  
8.0  
8.5  
10.5  
13  
4.0  
4.0  
4.0  
4.0  
5.0  
4.0  
5.0  
5.5  
5.5  
2.5 ±0.5  
2.5 ±0.5  
2.5 ±0.5  
2.5 ±0.5  
2.5 ±0.5  
2.0 ±0.5  
2.0 ±0.5  
4.0 ±1.0  
4.0 ±1.0  
−
10.0  
11.5  
11.5  
11.5  
11.0  
11.0  
12.6  
18.0  
18.0  
taped H0 = 16 mm  
bulk  
taped H0 = 16 mm  
bulk  
taped H0 = 16 mm  
taped H0 = 16 mm  
taped H0 = 16 mm  
bulk  
661 93121  
661 93124  
661 93146  
661 93135  
661 93056  
661 93139  
662 93129  
662 93114  
662 93131  
4.1 ±0.5  
−
4.1 ±0.5  
−
−
−
20 min.  
20 min.  
13  
bulk  
Notes  
1. Taped in accordance with “IEC 60286-2”; standard packaging: 1500 units/reel.  
2. Naked disc ceramic for substrate mounting, available on request.  
3. Insulated version is also available.  
PACKAGING  
All tape and reel specifications are in accordance with “IEC 60286-3”. Basic dimensions are given in the drawing below, the  
Dimensions of the Reel drawing, and tape and other Devices and Reel Dimensions tables.  
TAPE SPECIFICATIONS  
Thermistors with ∅D ≤ 12 mm on tape for 2322 66. 9....  
P
T
∆p  
∆p  
∆h  
∆h  
D
For dimensions, see Tape  
and other Devices table.  
H
3
0
0.2  
H
2
o
o
H
15  
5
1
d
H
W
W
0
2
L
W
1
W
0
D
0
P
P
1
F
0
t
T
TAPE AND OTHER DEVICE DIMENSIONS in millimeters  
SYMBOL  
PARAMETER  
DIMENSIONS  
TOLERANCE  
REMARKS  
see Specific Physical  
Dimensions table  
D
body diameter  
±0.5  
T
d
total maximum thickness  
lead diameter  
see Specific Physical Dimensions table  
0.6  
±10%  
P
pitch between thermistors:  
∅ < 12 mm  
12.7  
25.4  
12.7  
3.81  
0
±1  
±2  
±0.3  
±0.7  
±1.3  
∅ ≥ 12 mm  
feed hole pitch  
feed hole centre to lead centre  
component alignment  
P0  
P1  
∆h  
cumulative pitch error ±1 mm/20 pitches  
guaranteed between component and tape  
Document Number: 29070  
Revision: 10-Oct-03  
For technical questions contact: nlr.europe@vishay.com  
www.vishay.com  
165  
2322 66. 9....  
PTC Thermistors, Overload Protection  
For Telecommunication  
Vishay BCcomponents  
SYMBOL  
PARAMETER  
DIMENSIONS  
TOLERANCE  
REMARKS  
F
∆h  
W
lead to lead distance  
component alignment  
tape width  
5
0
18  
+0.6 to −0.1  
guaranteed between component and tape  
±2  
+1 to −0.5  
W0  
W1  
W2  
H1  
H2  
H3  
H0  
D0  
t
hold down tape width  
hole position  
hold down tape position  
component height  
≥12.3  
9
≤3.0  
−
±0.5  
−
see Specific Physical Dimensions table  
±1  
see Specific Physical Dimensions table  
component body to seating plane  
component top to seating plane  
lead-wire clinch height  
feed hole diameter  
4
16  
4
≤0.9  
≤11  
±0.5  
±0.2  
−
total tape thickness  
length of snipped lead  
with cardboard tape 0.5 ±0.1 mm  
L
−
CHARACTERISTICS CONCERNING TAPED THERMISTORS  
PARAMETER  
VALUE  
Minimum pull out force of the component  
Minimum pull off force of adhesive tape  
Minimum tearing force tape  
Maximum pull off force tape-reel  
Storage conditions  
5 N  
6 N  
15 N  
5 N  
Storage temperature range  
−25 to +40 °C  
Maximum relative humidity  
80%  
REEL SPECIFICATIONS in millimeters  
Dimensions of the reel for 2322 66. 6...1/2/3  
For W1 and W2, see Reel Dimensions table  
3
18  
356  
max.  
+1  
−0  
30  
77  
85.6 92  
22.5  
W
W
1
2
REEL DIMENSIONS in millimeters  
W2  
MAX.  
56  
∅
DIAMETER  
W1  
<12  
12  
42 ±1  
46 ±1  
60  
www.vishay.com  
166  
For technical questions contact: nlr.europe@vishay.com  
Document Number: 29070  
Revision: 10-Oct-03  

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