Commercial Grade Axial Lead
Power Wirewound & Film
Resistor
Power Derating Curve
100
Percent rated load (%)
80
+70°C
+155°C
+275°C
150
Heat Rise Chart
Heat rise (C)
60
40
20
120
90
60
30
10W
7W
5W
-55
0
50
100 150 200 250
300
0
20
40
60
80
100
Ambient Temperature (°C)
Rated load (%)
Ordering Data
Specify type, resistance, tolerance, RoHS-Compliance and
packaging. This example is for a Ceramic Axial Film, 2-watt,
1000Ω resistor.
Sample Part No.
IRC Type
CAF
2
1001
J
LF
BLK
CAF - Ceramic Axial Film
CAW - Ceramic Axial Wirewound
Power rating
(see specs table)
(≥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
Resistance Value (EIA 4-digit code)
Tolerance (EIA format)
J = ±5%
K = ±10%
RoHS - Compliance
Packaging
LF = RoHS compliant construction
BLK = bulk packaging
Wire and Film Technologies Division
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
CAW/CAF Series Issue August 2008 Sheet 3 of 3
IRCTT [ IRC - A TT ELECTRONICS COMPANY. ]
