General Note
IRC reserves the right to make changes in product specification without notice or liability.
All information is subject to IRC’s own data and is considered accurate at time of going to print. A subsidiary of
TT electronics plc
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
Wire and Film Technologies Division
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
Commercial Grade Axial Lead
Power Wirewound & Film
Resistor
Electrical Data
CAW/CAF Series
• Power ratings from 2W to 10W
• Non-inductive winding available
• Standard tolerance ±5% and ±10%
• Resistance range from 0.1Ω to 200KΩ
• Flameproof ceramic case with inorganic potting material
IRC Type
Power
Rating at
25°C (W)
Resistance
Range*
(Ohms)
Tolerance
(±%)
Temperature Coefficient of Resistance
(±ppm/°C)
Wirewound Type (CAW)
CAW-2 2 0.1 - 27 5, 10
400 (<20Ω)
350 (≥20Ω)
CAW-3 3 0.1 - 39 5, 10
CAW-5 5 0.1 - 47 5, 10
CAW-7 7 0.1 - 680 5, 10
CAW-10 10 0.1 - 910 5, 10
CAW-15 15 1.0 - 1K 5, 10
CAW-20 20 2.0 - 1.2K 5, 10
CAW-25 25 2.0 - 1.2K 5, 10
CAW-2A 2 0.1 - 27 5, 10
CAW-5A 5 0.1 - 47 5, 10
CAW-7A 7 0.1 - 680 5, 10
CAW-10A 10 0.1 - 910 5, 10
Film Type (CAF)
CAF-2 2 28 - 33K 5, 10
400 (<20Ω)
350 (≥20Ω)
CAF-3 3 40 - 56K 5, 10
CAF-5 5 48 - 100K 5, 10
CAF-7 7 681 - 200K 5, 10
CAF-10 10 911 - 200K 5, 10
CAF-15 15 1.1K - 200K 5, 10
CAF-20 20 1.3K - 200K 5, 10
CAF-2A 2 28 - 33K 5, 10
CAF-5A 5 48 - 100K 5, 10
CAF-7A 7 681 - 200K 5, 10
CAF-10A 10 911 - 200K 5, 10
CAW/CAF Series Issue August 2008 Sheet 1 of 3
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
Wire and Film Technologies Division
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
Environmental Data
Physical Data
Short-time overload ±5% + 0.05Ω; 2.5 x nominal power for 5 seconds
Dielectric withstanding voltage 1000Vac
Resistance to Soldering heat ±5% + 0.05Ω
Operating temperature range -55°C to 275°C
Dimensions (mm)
IRC Type(s)
Wirewound Type Film Type W (±1) D (±1) L (±1) H (±5) d (±0.02)
CAW-2 CAF-2 7.0 7.0 18.0 28.0 0.7
CAW-3 CAF-3 8.0 8.0 22.0 22.0 0.7
CAW-5 CAF-5 10.0 9.0 22.0 22.0 0.8
CAW-7 CAF-7 10.0 9.0 35.0 35.0 0.8
CAW-10 CAF-10 10.0 9.0 49.0 35.0 0.8
CAW-15 CAF-15 12.5 11.5 49.0 35.0 0.8
CAW-20 CAF-20 14.5 13.5 60.0 35.0 0.8
CAW-25 - 14.5 13.5 64.0 35.0 0.8
CAW-2A CAF-2A 7.0 7.0 18.0 28.0 0.7
CAW-5A CAF-5A 10.0 9.0 22.0 35.0 0.8
CAW-7A CAF-7A 10.0 9.0 35.0 35.0 0.8
CAW-10A CAF-10A 10.0 9.0 49.0 35.0 0.8
W
D
L
d
H
CAW-X / CAF-X Type CAW-XA / CAF-XA Type
L
d
HH
Commercial Grade Axial Lead
Power Wirewound & Film
Resistor
CAW/CAF Series Issue August 2008 Sheet 2 of 3
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
Wire and Film Technologies Division
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
Sample Part No.
IRC Type
CAF - Ceramic Axial Film
CAW - Ceramic Axial Wirewound
Power rating
(see specs table)
Resistance Value (EIA 4-digit code)
(≥100Ω - First 3 significant digits plus 4th digit multiplier)
Example: 100Ω = 1000; 1000Ω = 1001
(>100Ω - "R" is used to designate decimal)
Example: 10Ω = 10R0; 0.25Ω = R250
Tolerance (EIA format)
J = ±5%
K = ±10%
RoHS - Compliance
LF = RoHS compliant construction
Packaging
BLK = bulk packaging
Ordering Data
CAF 2 1001 J LF BLK
Specify type, resistance, tolerance, RoHS-Compliance and
packaging. This example is for a Ceramic Axial Film, 2-watt,
1000Ω resistor.
100
80
60
40
20
-55 050 100
Percent rated load (%)
Ambient Temperature (°C)
150 200 250 300
+70°C +155°C +275°C
Power Derating Curve Heat Rise Chart
120
90
30
020 40
Heat rise (C)
Rated load (%)
60 80 100
60
150
10W
7W
5W
Commercial Grade Axial Lead
Power Wirewound & Film
Resistor
CAW/CAF Series Issue August 2008 Sheet 3 of 3
