IRN, ULN, IRF, ULF 50-500W Metal Clad Resistors
UL Recognized, flat profile aluminium housing
Chassis-mounted for efficient heat dissipation
100% RoHS compliant
Wide power range: 50W to 500W
What are the IRN, ULN, IRF, ULF 50-500W Metal Clad Resistors?
The IRN, ULN, IRF, and ULF series are high-power, UL-recognized, flat-profile aluminium-housed metal clad resistors designed for chassis mounting. Covering a power range from 50W to 500W with resistance values from 1Ω to 5.78kΩ and tolerances as tight as ±0.5%, these resistors are fully RoHS compliant and rely on the chassis heatsink effect for superior thermal management. They are ideal for industrial motor drives, braking resistors, load banks, and power supply bleeder circuits.
IRN, ULN, IRF, ULF 50-500W Metal Clad Resistor Specifications
A practical overview for engineers and procurement teams evaluating resistive solutions.
Model: IRN, ULN, IRF, ULF
Resistor type: Metal clad resistor
Description: UL, Flat profile,aluminum housed, chassis mounted
Power Rating: 50W-500W
Resistance (Ω): 1~5.78k
Tolerance (%): ±0.5, ±1, ±2, ±5, ±10
TCR (ppm/C): 260 Max.
Applications of the IRN, ULN, IRF, ULF 50-500W Metal Clad Resistors
Where RARA metal clad resistors are deployed in the field.
-Dynamic braking resistors in motor drives
-Load banks for generator testing
-Bleeder resistors in high-power supplies
-Discharge resistors in UPS systems
-Neutral grounding in industrial panels
-Snubber circuits in high-power inverters
-Current limiting in industrial automation
-Dummy loads in RF and power testing
-Voltage dividers in high-voltage circuits
-Feedback networks in industrial DC-DC converters
Related Products of the IRN, ULN, IRF, ULF 50-500W Metal Clad Resistors
Model: RH10C
Resistor type: Metal clad resistor
Description: Metal clad cement encased
Power Rating: 10W
Resistance (Ω): 0.1~6k
Tolerance (%): ±0.5, ±1, ±2, ±5
TCR (ppm/C): 260 Max.
Model: RH, FRH
Resistor type: Metal clad resistor
Description: Aluminum housed, chassis mounted
Power Rating: 15W, 20W, 50W
Resistance (Ω): 0.1~2M
Tolerance (%): ±0.1, ±0.5, ±1, ±5, ±10
TCR (ppm/C): 40, 50, 100, 200
Model: URH
Resistor type: Metal clad resistor
Description: UL Aluminum housed, chassis mounted
Power Rating: 20W-100W
Resistance (Ω): 0.1~50k
Tolerance (%): ±1, ±2, ±5
TCR (ppm/C): 30, 50, 100, 200
Model: IRS
Resistor type: Metal clad resistor
Description: Slim profile, aluminum housed, chassis mounted
Power Rating: 30W, 50W
Resistance (Ω): 1~500
Tolerance (%): ±0.5, ±1, ±2, ±5, ±10
TCR (ppm/C): 260 Max.
Why Choose RARA Metal Clad Resistors
What sets RARA apart for engineers and procurement managers in industrial and automotive markets.
01
Automotive Qualified
AEC-Q200 tested models and IATF 16949 certification for EV and automotive powertrain applications. Trusted by GM Korea, Tesla, and Proterra.
02
STEP Files Included
3D STEP files available for core models, supporting ECAD/MCAD integration and thermal management simulation in your design workflow.
03
Wide Power Range
A single product family spanning 10W to 8.5kW means you can source across a project from one qualified, certified supplier.
04
Global Track Record
Deployed by Siemens, Rockwell, Toshiba, Schneider Electric, LG, and Hanwha — a customer list built on decades of consistent performance.
