IRHC 40-100W Series Metal Clad Resistors

What are the IRHC 40-100W Series Metal Clad Resistors?

The IRHC is an aluminium-housed, chassis-mounted wire wound metal clad resistor available in 40W, 60W, and 100W ratings. With a resistance range from 10Ω to 1kΩ and tolerances of ±5% and ±10%, it is designed for demanding high-power industrial applications.

Its aluminium body acts as an integrated heat sink — bolting directly to a chassis wall or heatsink plate allows the IRHC to efficiently conduct heat away from the resistive element, maintaining stable performance under sustained load. The wire wound construction delivers robust overload capability and long service life in motor drive, braking, and power conditioning environments.

Common deployments include motor drive braking circuits, industrial power supplies, EV discharge resistors, and control panel current limiting where reliable mid-power dissipation is required.

Model: IRHC
Resistor type: Metal clad resistor
Description: Aluminum housed, chassis mounted
Power Rating: 40W, 60W, 100W
Resistance (Ω): 10~1k
Tolerance (%): ±5, ±10
TCR (ppm/C): 260 Max.

Model: IRBT
Resistor type: Metal clad resistor
Description: Automotive
Power Rating: 60W
Resistance (Ω): 1~1k
Tolerance (%): ±5, ±10
TCR (ppm/C): 260 Max.

Model: IRB
Resistor type: Metal clad resistor
Description: Metal clad economy
Power Rating: 60W~120W
Resistance (Ω): 0.1~1.3k
Tolerance (%): ±2, ±5, ±10
TCR (ppm/C): 260 Max.

Model: SFH/SFV
Resistor type: Metal clad resistor
Description: Industrial
Power Rating: 60W~200W
Resistance (Ω): 0.1~2.2k
Tolerance (%): ±1, ±5, ±10
TCR (ppm/C):

Model: ARH, ARV
Resistor type: Metal clad resistor
Description: Automobile, pre-charge
Power Rating: 60W-500W
Resistance (Ω): 0.2~3k
Tolerance (%): ±0.5, ±1, ±2, ±5, ±10
TCR (ppm/C): 260 Max.