Beryllia Core, Silicone Coated
Power Resistors MIL-R-26 (RW)
& Commercial Industrial Styles
Power Derating Curve
120
Percent of Power Rating
100
80
Char. V
60
40
Char. U
20
0
25
75
125
175
225
275
350
Ambient Temperature (°C)
Derating
Ambient Temperature:
Operating temperature range of -55°C to +350°C.
Higher temperatures require derating as illustrated.
Stability:
Resistance chance is 1/2 or less than that of conventional power resistors when operated at the
same wattage.
Characteristic U
1. 275°C maximum hotspot temperature.
2. 5% maximum
∆R
for 2000 hour load life.
Characteristic U:
1. 350°C maximum hotspot temperature.
2. 3% maximum
∆R
for 2000 hour load life.
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
B Series Issue September 2008 Sheet 3 of 3
IRCTT [ IRC - A TT ELECTRONICS COMPANY. ]
