Resistors
Ceramic Case Resistors –
Wirewound / Metal Oxide
SQP / CAF / CAW Series
2 watts to 25 watts
Resistance 0R1 to 200K
High overload capability
RoHS compliant
Flameproof ceramic case with inorganic potting material
All parts are Pb-free and comply with EU Directive 2011/65/EU amended by (EU) 2015/863 (RoHS3)
Electrical Data
SQP2 / CA-2 SQP3 / CA-3 SQP5 / CA-5 SQP7 / CA-7
Power rating at 70°C
Limiting element voltage
Resistance range – oxide (CAF)
Resistance tolerance
TCR
Isolation voltage
Standard values
Thermal impedance
Ambient temperature range
°C/W
°C
50
45
30
26
Resistance range – wirewound (CAW)
watts
volts dc or ac rms
ohms
%
ppm/°C
volts
2
250
0R1-27R
3
300
0R1-39R
40R-150K
5
350
0R1-47R
48R-150K
7
500
0R1-680R
SQP7S
7
350
1R0-100R
5
<20R: 400
≥20R:
350
1000
E24 preferred
26
-55 to +155
21
16
12
10
SQP10 /
CA-10
10
700
0R1-910R
SQP15 /
CA-15
15
700
1R0-1K0
1K1-200K
SQP20 /
CA-20
20
750
2R0-1K2
1K3-200K
CAW25
25
750
2R0-1K2
-
ohms 28R-120K
681R-200K 101R-150K 911R-200K
Physical Data
Dimensions (mm) and weight (g)
Type
SQP2 / CA-2
SQP3 / CA-3
SQP5 / CA-5
SQP7 / CA-7
SQP7S
SQP10 / CA-10
SQP15 / CA-15
SQP20 / CA-20
CAW25
L max.
19
23
23
36
26
50
50
61
65
W max.
8
9
11
11
10
11
13.5
15.5
15.5
H max.
8
9
10
10
10
10
12.5
14.5
14.5
f min.
23
27
30
30
30
30
30
30
30
d (±0.1)
0.7
0.7
0.75
0.75
0.75
0.75
0.75
0.75
0.75
Wt. nom.
2.2
3.5
5
8.2
6
11
17.4
25
26.7
Alternate body shape
(CAW-A / CAF-A)
General Note
TT Electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
BI Technologies IRC Welwyn
www.ttelectronics.com/resistors
© TT Electronics plc
04.21
Ceramic Case Resistors –
Ceramic Case Resisters
Resistors
Wirewound / Metal Oxide
–
Wirewound /
Series
Oxide
SQP / CAF / CAW
Metal
SQP Series
Construction
A high purity ceramic rod, with force fit end caps onto which is wound a wire element: or a deposited metal oxide film
(depending on value). The element is fitted into a ceramic case with fireproof insulation cement.
Welwyn Components
Termination Details
Material
Solderability
Strength
The tinned copper lead wires are internally welded to the resistance element end caps.
The terminations meet the requirements of IEC 115-1 Clause 4.17.3.2
The terminations meet the requirements of IEC 86.2.21
Performance Data
Maximum
Load at rated power (1000hrs at 70˚C)
Derating from rated power at 70˚ C
Short term overload (6.25xPr for 5s)
Damp heat steady state (56 days, 40˚C,
Temperature rapid change
Resistance to solder heat
Pulse handling
90% RH)
R%
R%
R%
R%
R%
≤100K:
5% +0.05 ,
See Graph
2% +0.05
2% +0.05
2% +0.05
1% +0.05
Data available by request
>100K:
10%
P
100%
Marking
Type reference, resistance value and tolerance are
legend marked onto the upper surface.
Flammability
The resistor will not burn or emit incandescent
particles under any condition of applied temperature
or overload.
Solvent resistance
The body protection and marking are resistant to all
normal industrial solvents suitable for printed circuits.
50%
0%
-30
T˚C
70
155
275
General Note
TT Electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
© 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
BI Technologies IRC Welwyn
www.ttelectronics.com/resistors
Issue C ·
07.08
07.06
© TT Electronics plc
04.21
71
Ceramic Case Resistors –
Wirewound / Metal Oxide
SQP / CAF / CAW Series
Ordering Procedure
This product has two valid part numbers:
European (Welwyn) Part Number: SQP3-1K2JB5
(SQP3, 1.2 kilohms ±5%, Pb-free)
S
Q
P
1
1
Type
2
Value
3
-
1
K
2
2
J
3
3
J = ±5%
B5
B
5
4
4
Pb-free only
SQP2
3600/box
SQP3
3000/box
SQP5
2400/box
SQP7
1800/box
SQP7S
2400/box
SQP10
1500/box
SQP15
840/box
SQP20
720/box
Tolerance Packing & Termination Finish
SQP2, SQP3, E24 = 3/4 characters
R = ohms
SQP5, SQP7
K = kilohms
SQP7S, SQP10,
SQP15, SQP20
B15
B1
USA (IRC) Part Number: CAF31201JLF
(CAF3, 1.2 kilohms ±5%, Pb-free)
C
A
1
1
Type
2
Size
2
3
5
7
10
15
20
25
F
3
2
3
3
Body Shape
1
2
4
0
1
J
5
4
Value
L
6
6
Termination
Tolerance
Finish
J = ±5% LF = Pb-free
5
F
Packing
2
3
5
7
10
15
20
3600/box
3000/box
2400/box
1800/box
1500/box
840/box
720/box
CAF,
CAW
Omit for standard
3 digits + multiplier
R = ohms for values
A= Alternate
(2, 5, 7 & 10W only)
<100 ohms
CAW
General Note
TT Electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
BI Technologies IRC Welwyn
www.ttelectronics.com/resistors
© TT Electronics plc
04.21
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