Ceramic Case Resistors –
Wirewound / Metal Oxide
SQP / CAF / CAW Series
2wasto25was
Resistance0R1to200K
Highoverloadcapability
RoHScompliant
Flameproofceramiccasewithinorganicpongmaterial
Electrical Data
Physical Data
SQP2 / CA-2 SQP3 / CA-3 SQP5 / CA-5 SQP7 / CA-7 SQP7S SQP10 /
CA-10
SQP15 /
CA-15
SQP20 /
CA-20 CAW25
Power rating at 70°C watts 2 3 5 7 7 10 15 20 25
Limiting element voltage volts dc or ac rms 250 300 350 500 350 700 700 750 750
Resistance range – wirewound (CAW) ohms 0R1-27R 0R1-39R 0R1-47R 0R1-680R 1R0-100R 0R1-910R 1R0-1K0 2R0-1K2 2R0-1K2
Resistance range – oxide (CAF) ohms 28R-120K 40R-150K 48R-150K 681R-200K 101R-150K 911R-200K 1K1-200K 1K3-200K -
Resistance tolerance % 5, 10
TCR ppm/°C <20R: 400 ≥20R: 350
Isolation voltage volts 1000
Standard values E24 preferred
Thermal impedance °C/W 50 45 30 26 26 21 16 12 10
Ambient temperature range °C -55 to +155
Dimensions (mm) and weight (g)
Type L max. W max. H max. f min. d (±0.1) Wt. nom.
SQP2 / CA-2 19 8 8 23 0.7 2.2
SQP3 / CA-3 23 9 9 27 0.7 3.5
SQP5 / CA-5 23 11 10 30 0.75 5
SQP7 / CA-7 36 11 10 30 0.75 8.2
SQP7S 26 10 10 30 0.75 6
SQP10 / CA-10 50 11 10 30 0.75 11
SQP15 / CA-15 50 13.5 12.5 30 0.75 17.4
SQP20 / CA-20 61 15.5 14.5 30 0.75 25
CAW25 65 15.5 14.5 30 0.75 26.7
Alternate body shape
(CAW-A / CAF-A)
Resistors
09.18
General Note
TT Electronics reserves the right to make changes in product specication without notice or liability.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
© TT Electronics plc
www.ttelectronics.com/resistors
BI Technologies IRC Welwyn
AllpartsarePb-freeandcomplywithEUDirecve2011/65/EUamendedby(EU)2015/863(RoHS3)AllpartsarePb-freeandcomplywithEUDirecve2011/65/EUamendedby(EU)2015/863(RoHS3)
Ceramic Case Resistors –
Wirewound / Metal Oxide
SQP / CAF / CAW Series
The resistor will not burn or emit incandescent
particles under any condition of applied temperature
or overload.
Ceramic Case Resisters –
Wirewound / Metal Oxide
SQP Series
© 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 C · 07.06
Welwyn Components
Maximum
Load at rated power (1000hrs at 70˚C)
≤100K: 5% +0.05Ω, >100K: 10%
%R
hparG eeSC˚07 ta rewop detar morf gnitareD
Short term overload (6.25xPr for 5s) 50.0+ %2%R
Damp heat steady state (56 days, 40˚C, 90% RH) 50.0+ %2%R
Temperature rapid change 50.0+ %2%R
Resistance to solder heat 50.0+ %1%R
Pulse handling Data available by request
71
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.
Termination Details
Material The tinned copper lead wires are internally welded to the resistance element end caps.
Solderability The terminations meet the requirements of IEC 115-1 Clause 4.17.3.2
Strength The terminations meet the requirements of IEC 86.2.21
Marking
Type reference, resistance value and tolerance are
legend marked onto the upper surface.
Flammability
Solvent resistance
The body protection and marking are resistant to all
normal industrial solvents suitable for printed circuits.
Performance Data
P
100%
50%
0%
-30 70 155 275
T˚C
07.08
Resistors
09.18
General Note
TT Electronics reserves the right to make changes in product specication without notice or liability.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
© TT Electronics plc
www.ttelectronics.com/resistors
BI Technologies IRC Welwyn
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
3
-
1
K
2
J
B
5
1
2
3
4
USA (IRC) Part Number: CAF31201JLF (CAF3, 1.2 kilohms ±5%, Pb-free)
C
A
F
3
1
2
1
J
L
F
1
2
3
4
5
6
1
2
3
4
Type ValueTolerance Packing & Termination Finish
SQP2, SQP3,
SQP5, SQP7
SQP7S, SQP10,
SQP15, SQP20
E24 = 3/4 characters
R = ohms
K = kilohms
J = ±5%
Pb-free only
K = ±10%
B5
SQP2
3600/box
SQP3
3000/box
SQP5
2400/box
B15
SQP7
1800/box
SQP7S
2400/box
SQP10
1500/box
B1
SQP15
840/box
SQP20
720/box
1
2
3
4
5
6
Type Size Body Shape ValueTolerance
Termination
Finish
Packing
CAF,
CAW
2
Omit for standard
3 digits + multiplier
R = ohms for values
<100 ohms
J = ±5%
LF = Pb-free
2
3600/box
3
A= Alternate
(2, 5, 7 & 10W only)
K = ±10%
3
3000/box
5
5
2400/box
7
7
1800/box
10
10
1500/box
15
15
840/box
20
20
720/box
CAW
25
Ceramic Case Resistors –
Wirewound / Metal Oxide
SQP / CAF / CAW Series
09.18
General Note
TT Electronics reserves the right to make changes in product specication without notice or liability.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
© TT Electronics plc
www.ttelectronics.com/resistors
BI Technologies IRC Welwyn