POWER SOLUTION - NIKKOHM
50W to 500W HIGH POWER WIRE WOUND RESISTORS
FLAT SHAPED ALUMINUM HOUSED
IRN50-IRN150
IRF150-IRF500
Features and Applications
Dimensions (mm)
Type A B C D E F G dia. Weight(g)
IRN 50 70+/-1 60+/-0.3 10 50+/-0.3 50+/-0.3 - 4-5.3 dia. 100
IRN100 120+/-1 60+/-0.3 10 50+/-0.3 100+/-0.3 - 4-5.3 dia. 160
IRN150 170+/-1 60+/-0.3 10 50+/-0.3 150+/-0.3 - 4-5.3 dia. 220
IRF100 90+/-1 80+/-0.3 10 70+/-0.3 70+/-0.3 - 4-5.3 dia. 155
IRF150 120+/-1 80+/-0.3 10 70+/-0.3 100+/-0.3 - 4-5.3 dia. 200
IRF200 150+/-1 80+/-0.3 10 70+/-0.3 130+/-0.3 - 4-5.3 dia. 245
IRF250 180+/-1 80+/-0.3 10 70+/-0.3 160+/-0.3 - 4-5.3 dia. 290
IRF300 210+/-1 80+/-0.3 10 70+/-0.3 190+/-0.3 95 6-5.3 dia. 335
IRF400 270+/-1 80+/-0.3 10 70+/-0.3 250+/-0.3 125 6-5.3 dia. 430
IRF500 330+/-1 80+/-0.3 10 70+/-0.3 310+/-0.3 155 6-5.3 dia. 525
Non-inductive, flat shaped aluminum housed wire wound fixed resistors with 50W to 500W..
Minimum resistance of 1ohm, +/-0.5% tolerance available.
10mm thickness allows excellent heat extrusion from resistor.
Narrower body (IRN) will be suitable for high density installation.
Light weight silicone filled insulation and higher temperature operating cement filled
insulation are prepared.
Strong over load characteristics are fit for applications of industrial power electronics,
switching power supplies, braking resistors for motor control electronics, rush current
protection in automotive electronics, industrial power supplies.
D B
G
300+/-10 F F
E C
A
POWER SOLUTION - NIKKOHM
50W to 500W HIGH POWER WIRE WOUND RESISTORS
FLAT SHAPED ALUMINUM HOUSED. IRN50-IRN150, IRF150-IRF500
Ordering Information
P/N Type Insulating
Material
Resistance Tolerance Additional
IRN100S1R0J 0.75sqmm IRN100 S(Silicone) 1 ohm +/-5%(J) Lead wire
IRN150C1K0F IRN150 C(Cement) 1K ohm +/-1%(F)
IRF200S100RJ IRF200 S(Silicone) 100 ohm +/-0.5%(D)
IRF500C10RJ 2sqmm IRF500 C(Cement) 10 ohm +/-5%(J) Lead wire
Specifications
Lead wire
Type Rating power
with heat sink
Resistance
(ohm)
Tolerance
(%)
Dielectric
strength 2mm2 1.25 mm2
IRN 50 50W 1-420 NA 1-420
IRN100 100W 1-1.1K NA 1-1.1K
IRN150 150W 1-1.75K NA 1-1.75K
IRF100 100W 1-1.1K NA 1-1.1K
IRF150 150W 1-1.75K NA 1-1.75K
IRF200 200W 1-2.2K 1-4 ohm 4.1 -
IRF250 250W 1-2.79K 1-5 ohm 5.1 -
IRF300 300W 1-3.5K 1-6 ohm 6.1 -
IRF400 400W 1-4.45K 1-8 ohm 8.1 -
IRF500 500W 1-5.78K
+/-0.5(D)
+/-1.0(F)
+/-2.0(G)
+/-5.0(J)
+/-10(K)
Standard
AC1000V,
Available AC
1500V
2500V
3000V
4500V
at 2mA current
1-10 ohm 10.1 -
Performance
Term Specifications Conditions
Temperature Coefficient +/-260 ppm/C Maximum
Insulation Resistance 20Megohm min. Dry condition.
Operating Temperature, cement filled -55C - +200C
Operating Temperature, silicone filled -55C - +150C
Short Time Overload +/-(1.0%+0.05ohm) 5 times rating power, 5 seconds.
Moisture Resistance +/-(2.0%+0.05ohm) 40C, 95%RH, DC100V case to leads, 500H
Thermal Shock +/-(1.0%+0.05ohm) Heating with rating power 30 minutes, –25C
15 minutes
Vibration +/-(1.0%+0.05ohm)
10-50-10Hz, 1 minute/cycle, 2 hours, x , y
and z direction.
Humidity +/-(2.0%+0.05ohm)
40C, 95%RH, 0.1 rating power, 90min ON,
30min OFF, 500hours.
Load Life +/-(2.0%+0.05ohm) Rating power, 90min ON, 30min OFF,
500hours.
Note for derating, cement filled type.
(1) Attached on chassis for 150W to 500W and free air
for 50W-100W.
(2) Free air for 150W.
(3) Free air for 200W and 250W.
(4) Free air for 300W to 500W.
Note for lead wire:
0.75 sqmm leads is available.
20030114
Derating
%Rating Watts
100 (1) 25C
80 (2)
60 (3)
40 (4)
280C
20
0
-50 0 50 100 150 200 250 300
Ambient Temperature (C)
