RA 80W to 750W Series Metal Clad Resistor Assemblies
Powder-coated steel enclosure
80W–750W free-air power rating
Power inverters, motor drives & braking applications IRH/IRV resistor core with protective steel case Inductive & non-inductive winding options
–55°C to +200°C operating range
100% RoHS compliant
What are the RA 80W to 750W Series Metal Clad Resistor Assemblies?
The RA series is a family of high-power metal clad wire wound resistor assemblies purpose-designed for use in power inverters, motor drives, and other demanding industrial power electronics applications. Unlike a bare chassis-mount resistor, each RA assembly takes a proven IRH or IRV metal clad resistor core and encloses it within a powder-coated, oven-baked steel outer case — creating a self-contained, mechanically protected unit that conforms to international safety specifications and requires no additional guarding or enclosure in most installation environments.
The steel enclosure is robustly constructed and finished for durability, protecting the internal resistor element from mechanical damage, contamination, and accidental contact during installation and service. This makes the RA series particularly well suited to panel-build environments, power inverter cabinets, and industrial drive enclosures where assembly safety and compliance requirements demand that live resistive components are fully shrouded.
The resistance range spans 0.1Ω to 6.8kΩ for inductive models and 0.1Ω to 3kΩ for non-inductive models depending on the base resistor, with tolerance options of ±0.5%, ±1%, ±2%, ±5%, and ±10% available across the full range. The operating temperature range of –55°C to +200°C and a TCR of ±260 ppm/°C maximum ensure stable, predictable resistance across the full spectrum of industrial ambient conditions.
RA 80W to 750W Series Metal Clad Resistor Assemblies Specifications
A practical overview for engineers and procurement teams evaluating resistive solutions.
Model: RA
Resistor type: Metal clad resistor
Description: Assembly
Power Rating: 80W~750W
Resistance (Ω): 0.1~2.2k
Tolerance (%): ±0.5, ±1, ±2, ±5, ±10
TCR (ppm/C): 260 Max.
Applications of the RA 80W to 750W Series Metal Clad Resistor Assemblies
Where RARA metal clad resistors are deployed in the field.
-Power inverters — enclosed resistor assemblies for industrial and renewable energy inverter platforms
-Motor drives — continuous duty braking and load resistors in variable frequency drive (VFD) systems
-Regenerative braking systems — kinetic energy dissipation in high-power motor control applications
-Snubber networks — transient voltage suppression in IGBT and MOSFET switching circuits (non-inductive option)
-DC bus discharge resistors — controlled bleed-down of high-voltage DC link capacitors at system shutdown
-Industrial panel builds — safety-compliant enclosed resistors where bare chassis-mount components are not acceptable
-Soft-start and inrush limiting — current control for large industrial motors and power conversion equipment
-Energy storage system (ESS) discharge control — resistive discharge networks in battery and capacitor banks
-EV and HEV charging infrastructure — high-power load resistors in AC and DC charging station equipment
Related Products of the RA 80W to 750W Series Metal Clad Resistor Assemblies
Model: HRA
Resistor type: Metal clad resistor
Description: Assembly
Power Rating: 520W-2500W
Resistance (Ω): 0.1~1.6k
Tolerance (%): ±0.5, ±1, ±2, ±5, ±10
TCR (ppm/C): 260 Max.
Model: LCA
Resistor type: Metal clad resistor
Description: Assembly
Power Rating: 1kW-4.2kW
Resistance (Ω): 0.6~864
Tolerance (%): ±5, ±10
TCR (ppm/C): 260 Max.
Model: MBH/MBV
Resistor type: Metal clad resistor
Description: Mini Assembly
Power Rating:1.1kW-2.9kW
Resistance (Ω): 0.4~240
Tolerance (%): ±5, ±10
TCR (ppm/C): 260 Max.
Model: BRH/BRV
Resistor type: High Power Braking
Description: Industrial
Power Rating:1.4kW-3.4kW
Resistance (Ω): 0.5~240
Tolerance (%): ±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.
