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
Issue Preliminary
0106
WIREWOUND AND FILM TECHNOLOGIES DIVISION
736 Greenway Road • Boone, North Carolina 28607-1860 • Tel: 828-264-8861 • Fax: 828-264-8866 • www.irctt.com
IRC Type
PWR-3
PWR-5
PWR-7
PWR-10
PWR SERIES
GENERAL PURPOSE STAND-UP
POWER WIREWOUND RESISTOR
• 3, 5, 7 and 10 watts
• 0.1 ohm to 18K ohm range
• Radial leads for PC mount
• TC's from 300 ppm/°C to +5500 ppm/°C
• Lead Free ROHS Compliant Construction Available
- Power Rating: 3,5,7, and 10 watts
- Resistance Range:
3 watt: 0.1Ω to 7.5K 7 watt 0.1Ω to 18K
5 watt: 0.1Ω to 8.5K 10 watt 0.18Ω to 18K
- Tolerance: ±5% and ±10%
(refer to PWRG for tolerances less than 5% pg. 129)
- Flameproof inorganic construction
- EIA RS-344, insulated fixed wirewound resistors
SPECIFICATIONS:
DIMENSIONS (Inches and (mm)):
A
0.475 ±0.030
(12.0 ±0.8)
0.500 ±0.030
(12.7 ±0.8)
0.500 ±0.030
(12.7 ±0.8)
0.630 ±0.032
(16.0 ±0.81)
B
0.320 ±0.030
(8.1 ±0.8)
0.350 ±0.030
(8.8 ±0.8)
0.350 ±0.030
(8.8 ±0.8)
0.510 ±0.032
(13.2 ±0.81)
C
1.00 ±0.030
(25.4 ±0.8)
1.00 ±0.030
(25.4 ±0.8)
1.50 ±0.032
(38.1 ±0.81)
1.39 ±0.032
(35.3 ±0.81)
D
0.200 ±0.062
(5.08 ±1.6)
0.200 ±0.062
(5.08 ±1.6)
0.200 ±0.062
(5.08 ±1.6)
0.290 ±0.062
(7.4 ±1.6)
E
0.175 ±0.062
(4.44 ±1.6)
0.175 ±0.062
(4.44 ±1.6)
0.175 ±0.062
(4.44 ±1.6)
0.250 ±0.062
(6.4 ±1.6)
LD
0.036 ±0.002
(0.91 ±0.05)
0.036 ±0.002
(0.91 ±0.05)
0.036 ±0.002
(0.91 ±0.05)
0.036 ±0.002
(0.91 ±0.05)
POWER DERATING: HOT SPOT TEMPERATURE
RISE AT 25°C
HOW TO ORDER:
Sample Part No.:
PWR 10 12K 10% LF
Type
Power
Range
Tolerance
Lead Free Construction
% Rated Power
% Rated Load
Hot Spot Temperature (°C)
Ambient Temperature
Fireproof high
temp.
ceramic case with
Inorganic
fireproof
encapsulant
Alloy resistance wire on
fiberglass substrate
