AWL1602-10RJI 概述
Tubular Vitreous Enamelled Wirewound Resistors 管状釉瓷线绕电阻器
AWL1602-10RJI 数据手册
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PDF下载Tubular Vitreous Enamelled
Wirewound Resistors
Welwyn Components
1600/1900 Series
•
Impervious lead free vitreous enamel coating
• Can be supplied with fixed, adjustable,
tapped or low inductance winding
• Seven termination styles with choice of
mounting arrangements
• Manufactured RoHS compliant
Pb-free terminations*
* Check status of stock when ordering
General Information
Vitreous enamelled wirewound resistors are capable of
withstanding a higher dissipation size for size, than any other
protected type; this is attributable to the higher operating
temperature which the wire and enamel can withstand.
Vitreous enamel provides exceptionally good protection to the
wire element and is essentially impervious to moisture. The
resistors can safely be used in harsh environmental conditions.
chromium resistance wires and specially formulated enamel to
ensure that the resistors can withstand repeated heat cycling
without damage.
Connections between the resistance element and end
terminations are welded; other connections are brazed.
Mounting devices are available which permit resistors to be
mounted by both ends or by one end. Single ended mounting
is recommended for applications which do not subject the
resistor to shock or vibration.
The Welwyn range is based on thirteen sizes of tube, each of
which has a recommended maximum dissipation which limits
operating surface temperature to a maximum of 375°C.
Ferrules and the F type mounting plug are anchored into the
tubes with high temperature adhesive.
The stability and high reliability of Welwyn tubular vitreous
resistors is a direct result of the best quality materials being
used in their construction.
Special requirements, for types or styles not described
in this brochure, will be considered for economic
quantities.
High purity ceramic tubes have been matched with nickel
Electrical Data
1601
1905
1600
1602
17
1906
1603
1604
Power rating at 70°C
Resistance range
watts
11
16
16.5
22
25
35
ohms
volts
See Table 1
See Table 1
Limiting element voltage
TCR (-55 to +200°C)
Resistance tolerance
Values
ppm/°C
%
Typically: <+75
1, 2, 5, 10
Maximum + 200
See table 1 for value restrictions
E24 preferred
Thermal impedance
Operating temperature range
°C/watt
°C
See fig. 1
-55 to +375
1605
1908
1607
76
1606
1608
1609
Power rating at 70°C
Resistance range
watts
ohms
volts
47
54
91
115
165
See Table 1
See Table 1
Limiting element voltage
TCR (-55 to +200°C)
Resistance tolerance
Values
ppm/°C
%
Typically: <+75
1, 2, 5, 10
Maximum + 150
See table 1 for value restrictions
E24 preferred
See fig. 1
Thermal impedance
Operating temperature range
°C/watt
°C-55 to +375
Note See Figure 1 for curves of temperature rise / watts dissipation.
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability.
A subsidiary of
All information is subject to Welwyn’s own data, relates to current manufacture and is considered accurate at time of going to print.
TT electronics plc
© Welwyn Components Limited · Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
Issue E · 10.05
121
Tubular Vitreous Enamelled
Wirewound Resistors
1600/1900 Series
Welwyn Components
Electrical Data (continued)
Table 1
*Dissipation (watts) to
produce operating
Resistance range (ohms)
Limiting
Low inductance
winding resistance
range (ohms)
element
voltage
hotspot temperature (°C) of:
Ambient = 20°C
Ambient
= 70°C
Minimum
Termination
style
Min. res. at
resistance at
Max. at
any
Max. at
Type
either
200
5
300
10
375
375
11
5%
1
2%
15
15
15
20
20
20
20
30
30
30
30
30
35
1%
25
30
30
25
30
30
60
40
40
50
40
50
50
tolerance
15k
C
All others
150
10%
10
10
10
10
10
10
15
15
10
15
15
20
30
5%
50
50
50
50
50
50
50
50
50
50
50
50
100
tolerance
1601
1905
1600
1602
1906
1603
1604
1605
1908
1607
1606
1608
1609
14
20
250
-
1.3k
3.5k
5.0k
4.0k
5.5k
7.5k
11.5k
14k
7
14.5
15
16
1
30k
450
7.5
8
21
16.5
17
1
56k
-
600
15.5
19
22
1
43k
500
700
850
1300
1100
1200
1300
2100
2100
3000
350
9.5
11
15.5
21
24
34
41
52
74
28
22
1
50k
550
22
32
25
1
83k
750
31
45
35
1
100k
100k
100k
100k
160k
180k
250k
1000
900
41
59
47
1
47
68
54
1
1000
900
16k
66
95
76
1
22k
80
115
145
208
91
1
1900
1800
2500
32k
101
145
115
165
1
38k
1
58k
*The stated dissipation applies to resistors mounted horizontally with unobstructed bore.
Performance Data
Max
Typ
Load : 1000 hours at 70°C
Shelf life : 12 months at room temperature
Climatic
∆R%
∆R%
∆R%
∆R%
∆R%
∆R%
5.0
1.0
0.5
0.2
0.1
zero
3.5
0.1
0.35
0.05
0.02
zero
Long term damp heat
Bump and vibration
Noise (in a decade of frequency)
Pulse Handling Data
Available by request
© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
Issue E · 10.05
122
Tubular Vitreous Enamelled
Wirewound Resistors
1600/1900 Series
Welwyn Components
Physical Data
Table 2 Dimensions in millimetres. See fig 2-8 for styles
A
B
C
D
nom
4.5
4.5
4.5
4.5
4.5
4.5
4.5
5.7
5.7
7.0
5.7
7.0
7.0
E
F
G
nom
15
10
10
15
15
15
15
17
17
22
17
22
22
H
J
K
Type
max
33.0
56.1
61.5
51.0
64.3
74.5
102
89.5
102
102
166
152
216
max
17.5
14.5
14.5
17.5
17.5
17.5
17.5
24.0
24.0
32.0
24.0
32.0
32.0
max
8.2
max
5.0
5.0
5.0
5.0
5.0
5.0
5.0
6.8
6.8
9.8
6.8
9.8
9.8
max
19.5
17.5
17.5
19.5
19.5
19.5
19.5
26.5
26.5
32.0
26.5
32.0
32.0
.25
3.0
3.0
3.0
3.0
3.0
3.0
3.0
4.0
4.0
6.4
4.0
6.4
6.4
max
59
1601
1905
1600
1602
1906
1603
1604
1605
1908
1607
1606
1608
1609
M3
M3
M3
M3
M3
M3
M3
M4
M4
M6
M4
M6
M6
6.55
6.55
8.2
-
-
77
8.2
90
8.2
101
128
122
134
134
198
184
248
8.2
13.2
13.2
19.2
13.2
19.2
19.2
Terminations
Styles B, 4B, AP and AW are available in all 13 tube sizes.
Ferrule, electrically isolated (Figure 6) Connection to
resistor via Pb free solder coated nickle iron lugs. Denoted
by prefix CB, thus: CB1602.
Styles C, CB and CP are available in sizes 1601 to 1609
inclusive, 1906 and 1908
Ferrule, electrically live (Figure 7) Nickel plated brass.
Denoted by prefix C, thus: C1602.
Lugs (Figure 2): Pb free solder coated nickel iron. Denoted
by prefix B to size reference, thus B1602
Ferrule, electrically isolated (Figure 8): Connection to
resistor via pigtails of 14/.193 mm copper, 150mm
minimum length. Denoted by prefix CP thus: CP1602
Pigtails (Figure 3): 14/.193 mm copper, 150 mm minimum
length. Denoted by prefix AP, thus AP1602
Rigid wires (Figure 4): 1.2 mm diameter tinned copper, 32
mm minimum length.
Marking The resistors are legend marked with type
reference, resistance value, tolerance and manufacturing
date code. Value marking conforms to IEC 62.
Denoted by prefix AW, thus: AW1602
Lugs with screws, nuts and washers (Figure 5): Nickel
plated brass screws and nuts. Denoted by prefix 4B,
thus: 4B1602.
Solvent resistance: The vitreous coating and marking are
resistant to all accepted industrial cleaning fluids.
© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
Issue E · 10.05
123
Tubular Vitreous Enamelled
Wirewound Resistors
1600/1900 Series
Welwyn Components
partial open winding necessitates a reduced maximum
resistance, when compared with fixed resistors, and the
resistance range is also defined in Table 4.
Adjustable Resistors (see Figure 9)
Adjustable resistors use the same basic construction as fixed
resistors already described, and have a window in the vitreous
enamel through which contact is made to the resistive
element by a sliding contact band. The band is fitted with a
clamping screw and nut to retain it firmly in position.
More than one adjusting band can be fitted, up to the
maximum number specified in Table 3.
Adjustable resistors are available in termination styles B, 4B,
AP, C, CB and CP, in sizes 1602 to 1609 inclusive and 1906
and 1908 denoted by prefix ‘V’.
The adjustable winding style has a maximum permissible hot
spot temperature of 300°C and the maximum dissipation, for
an ambient temperature of 20°C, is specified in Table 4. The
Table 3
Tube
size
A mm
max.
B mm
max.
Hole C
Max. no of
adjusting
bands
dia. mm
1602
1603
1906
1604
1605
1908
1606
1607
1608
1609
20
27
3.2
1
20
25
25
30
30
30
27
32
32
38
38
38
3.2
3.7
3.7
3.7
3.7
3.7
3
2
4
2
3
5
Table 4
Max. dissipation in
Resistance range (ohms)
20°C ambient (watts)
Type
Min. for
styles VC,
VCP
Min. for
all other
styles
Max. for
all styles
200°C
300°C
hot spot
8
hot spot
15.5
19
1602
1906
1603
1604
1605
1908
1607
1606
1608
1609
4
4
3
3
1.6k
2.5k
9.5
11
22
6
6
3.0k
16
31
8
8
5.3k
21
41
6
6
4.5k
24
47
11
11
14
17
25
10
9
7.5k
34
66
8.1k
41
80
13
16
24
13.2k
15.4k
25.5k
52
101
145
74
Manufactured Values
E24 preferred
Standard Selection Tolerance 10ꢀ
All other details of the electrical and environmental
performance of adjustable resistors are the same as for
fixed resistors.
© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
Issue E · 10.05
124
Tubular Vitreous Enamelled
Wirewound Resistors
1600/1900 Series
Welwyn Components
Tapped Resistors See Figure 10
Ordering Procedure
Enquiries for tapped resistors must state the following details:
Fixed resistors can be supplied with taps to special order.
Because of the reduced winding length, the total resistance of
a tapped resistor will be less than can be offered on a fixed
resistor of the same size. The reduction is proportional to the
number of taps and Table 5 is intended as a guide.
Resistance per section
Maximum dissipation per section
Maximum operating ambient temperature
Maximum permissible dimensions if important
Type of terminations required. (See ‘Terminations’, page 3)
Resistor style or proposed method of mounting.
The minimum resistance per section on all sizes is 1Ω and the
standard selection tolerance for any section is 10%
Table 5
Maximum*
total
dissipation
in 20°C
Maximum*
resistance
with single
tap
Maximum*
number
of taps
ambient
(ohms)
(watts) with
single tap
Type
1905
1600
1602
1906
1603
1604
1605
1908
1607
1606
1608
1609
14.5
15.0
15.5
19.0
22
9k
12k
9k
1
1
1
1
1
2
2
2
2
4
4
4
13k
18k
29k
34k
38k
53k
78k
93k
140k
31
41
47
66
80
*Maximum total dissipation assumes that this will be
evenly spread over the total element length.
101
145
The recommended dissipations for each of the resistor hot
spot temperatures applies to resistors mounted horizontally. If
the bore is completely blocked a 15% derating is
recommended. However, wherever possible, resistors should
be mounted vertically with unobstructed bore.
Low Inductance Resistors
Ayrton-Perry wound elements are supplied for low inductance
applications. This winding style has a maximum permissible
hot spot temperature of 300°C. The maximum dissipation is
defined in Table 1 under the heading Operating hot spot
temperature of 300°C, and resistance ranges are defined in
the three right-hand columns of this table.
This makes best use of the chimney effect of the heated tube
and will encourage a cooling stream of air through the bore.
Allowances must be made, when tubular resistors are mounted
in banks, for the effects produced by radiation between tubes.
Application Notes
Appreciable reduction of hot spot temperature can be
achieved by arranging that resistors are subjected to some
measure of forced draught. In general, it is most efficient to
extract air from the resistor enclosure and arrange that an air
inlet is adjacent to the bottom of the tubes.
When cold, vitreous enamel has excellent insulation resistance.
In common with all insulants the specific resistance of the
enamel decreases with increased temperature; therefore, if
operated at any temperature approaching the maximum, the
resistor cannot be classed as an insulated type and should not
be used in contact with any conducting materials.
If soft soldered connections are used the resistors should be derated
where applicable to limit the hot spot temperature to 300°C.
© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
Issue E · 10.05
123
Tubular Vitreous Enamelled
Wirewound Resistors
1600/1900 Series
Welwyn Components
Table 6 mounting clip dimension (mm) See Fig. 11
Clip Type
A
B
C
D
E
F
G
H
J
K
Auxiliary
ref. type nom. max nom. max max max 0.2 dia dia nom locking
spring ref
1601 52
1602 70
68
86
MD1 1603 90 106 29 19 17.5 14.5 4.8 4.0 3.9 7.2
MD16
MD4 1604 121 137
1605 108 128
1906 83
99
Ordering Procedure
1607 125 146
Mounting clips (and auxiliary locking
springs when required) should be ordered
in units and the type reference specified.
MD3 1608 176 197 49 33 32.0 19.0 6.4 4.0 6.3 9.5
MD6 1609 240 261
MD18
These mounting clips are suitable for termination styles C, CB and CP.
MD4, 5 and 6 have an ear formed in the bottom surface of the bracket to
prevent rotation of the mounting plate. The auxiliary locking springs
ensure positive retention of the tube under severe mechanical shock
conditions. See Figure 11.
Table 7 Mounting brackets dimensions (mm). See Fig. 12.
Bracket
ref.
Type
A
nom
B
nom
C
nom
D
nom
E
nom
MD40
1600
1905
1601
1602
1603
1604
1906
1605
1606
1908
1607
1608
1609
78
73
92
87
10
20
4.2
50
64
68
82
MD41
MD42
91
105
133
95
13
20
4.2
119
81
106
183
119
121
171
235
120
197
133
143
193
257
20
28
25
30
5.2
5.2
Ordering Procedure
Mounting brackets should be ordered in
units and the type reference specified.
MD43
These brackets are suitable for termination styles B, 4B, AP & AW
Table 8 Mounting plug dimensions (mm) See Fig. 13.
Type
A
B
C
Min.
Max.
1601
1602
1603
1604
1906
1605
1606
1908
1607
1608
1609
1.6
3.7
5.3
M4
1.6
3.2
3.7
5.2
5.3
6.8
M5
M6
Ordering Procedure
Mounting plugs are denoted by the prefix
‘F’ added to the size reference;
e.g. BF1602 and APF1602.
F type bushes are suitable for termination styles B, 4B AP and AW
© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
Issue E · 10.05
126
Tubular Vitreous Enamelled
Wirewound Resistors
1600/1900 Series
Welwyn Components
Ordering Procedure
Specify the full type reference, resistance value and tolerance, using IEC 62 code references.
The addition of L to the prefix describing terminal configuration indicates Ayrton-Perry winding.
Example: Electrically live ferrule terminated 1601 size at 10 ohms and 5% -
C
1601
-
10R
J
I
Adjustable Option
Fixed
V
Adjustable
Termination Style
B
AP AW 4B CB
C
CP
See Figures 2 to 8
Winding & Mounting Options
Standard
L
F
Low Inductabce
Mounting plug
Tube Size
Value (USE IEC62 code)
Tolerance (use IEC62 code)
F
G
J
1%
2%
5%
K
10%
Packing
I
Box
Standard
Note - consult data sheet in detail for valid combinations.
Minimium Ordering Quantity: 10
Order Multiple: 1
© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
Issue E · 10.05
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