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
© IRC, Inc. Corpus Christi TX 78411 USA
Telephone: 361 992 7900 · Facsimile: 361 992 3377 · Email: afdsales@irctt.com · Website: www.
irctt.com
Corpus Christi TX 78411 USA
Issue Preliminary
0106
SEMI-PRECISION POWER WIREWOUND RESISTOR
FOR PULSE & SURGE APPLICATIONS
• 2 watts to 15 watts
• 0.10 ohms to 5000 ohms
• ±3%, ±2%, or ±1% tolerance
• ±20 ppm/°C TCR
• Lead Free, ROHS Compliant Construction
Allow wirewound
element
All welded
construction
Heat conducting
ceramic substrate
Flameproof
ceramic housing
TEMPERATURE RISE: POWER DERATING:
% Rated Load
Ambient Temperature
Hot Spot Temperature
% Rated Load
Inorganic fireproof
encapsulant
PPW SERIES
Resistive Range
1 to 9.9Ω
10 to 29.9Ω
30 to 99Ω
100 to 1600Ω
Power at
25°C
(watts)
2
3
5
7
10
15
SPECIFICATIONS:
PPW-3
PPW-5
PPW-7
PPW-10
PPW-15
Resistance
Range (ohms)
0.1 to 1600
0.1 to 1600
0.1 to 1600
0.1 to 2500
0.1 to 5000
0.1 to 5000
*10 microseconds - Maximum rise time to peak voltage.
360 or 1000 microseconds - minimum decay time to
one half peak.
10 x 1000*
250V
500V
600V
1000V
10 X 360*
650V
850V
1000V
1500V
DIMENSIONS (Inches and (mm)):
LIGHTING SURGE CAPABILITIES FOR PPW-2:
IRC Type
PPW-2
Please note: When ordering the alternate configuration please add an 'A' after the part number. (i.e., PPW-3A)
HOW TO ORDER:
PPW 10 15Ω 2% LF
Type
Power
10 = 10 watts
Resistance Value
Expressed in ohms
(Std. EIA/MIL Values)
Tolerance
±3%, ±2%, ±1% std.
Lead Free Construction
IRC Type
PPW-2
PPW-3
PPW-5
PPW-7
PPW-10
PPW-15
L ±0.03 (0.8)
0.69 (17.05)
0.88 (22.3)
0.88 (22.3)
1.39 (35.3)
1.88 (47.7)
1.88 (47.7)
W ±0.03 (0.8)
0.275 (6.99)
0.310 (7.87)
0.380 (9.65)
0.380 (9.65)
0.380 (9.65)
0.500 (12.7)
H ±0.03 (0.8)
0.275 (6.99)
0.310 (7.87)
0.350 (8.89)
0.350 (8.89)
0.350 (8.89)
0.500 (12.7)
D Diameter
0.032 (0.8)
0.032 (0.8)
0.032 (0.8)
0.032 (0.8)
0.032 (0.8)
0.032 (0.8)
E ±0.03 (0.8)
0.32 (8.134)
0.38 (9.65)
0.41 (10.4)
0.47 (11.9)
0.47 (11.9)
0.50 (12.7)
Standard Configuration Alternate Configuration
