LFH 300W to 2000W Series Metal Clad Resistors
Aluminium housed, chassis mount 300W–2000W power rating (on heatsink)
Motor drives, braking & snubber applications EV charging & industrial power sources
Tab terminal & wire termination options Inductive & non-inductive winding options 100% RoHS compliant
What are the LFH 300W to 2000W Series Metal Clad Resistors?
The LFH 300~2000 is a heavy-duty horizontal-mount wire wound metal clad resistor series designed for the most demanding high-power industrial applications. Spanning nine models from LFH 300 through to LFH 2000, the series covers heatsink-rated power dissipation from 300W to 2000W — making it the highest continuous power rating available in the RMS metal clad resistor range, and one of the most capable single-body resistor families suited to sustained industrial duty.
Each model is built around a wide-profile extruded aluminium housing that provides rugged mechanical protection and functions as a high-performance heatsink when bolted to a chassis or external heatsink surface. The generous mounting footprint of the LFH series facilitates excellent thermal transfer even at full rated power, enabling the resistor to handle the sustained or repetitive high-energy loading cycles encountered in motor drive braking, load bank, and EV charging applications without thermal runaway or premature degradation.
Two termination options are offered across the range: a standard tab terminal configuration and a wire termination option (suffix W, 300mm standard lead length), giving installers the flexibility to select the connection method best suited to their panel wiring and cable management requirements. Both inductive and non-inductive winding configurations are available, with the non-inductive option essential for snubber and switching applications where residual winding inductance would impair high-frequency transient suppression performance.
The resistance range spans 0.1Ω to 7.0kΩ for inductive models and 0.1Ω to 3.0kΩ for non-inductive models depending on the power rating, with tolerance options of ±1%, ±5%, and ±10% — covering general industrial load control through to defined discharge timing specifications. Dielectric withstand voltage is rated at AC 2500V (1 minute, maximum 5mA leakage current), insulation resistance is 100MΩ at 500Vdc, and heat resistance testing is conducted at 180°C for 2 hours — confirming suitability for high-voltage bus architectures and elevated ambient temperature installations. The TCR of ±260 ppm/°C maximum ensures predictable and stable resistance across the full operating temperature range.
LFH 300W to 2000W Series Metal Clad Resistors Specifications
A practical overview for engineers and procurement teams evaluating resistive solutions.
Model: LFH
Resistor type: Horizontal metal clad
Description: Industrial
Power Rating: 300W-2kW
Resistance (Ω): 0.1~7k
Tolerance (%): ±1, ±5, ±10
TCR (ppm/C):
Applications of the LFH 300W to 2000W Series Metal Clad Resistors
Where RARA metal clad resistors are deployed in the field.
-Motor drives — sustained high-power braking and load resistors in variable frequency drive (VFD) and servo drive systems
-Regenerative braking systems — continuous high-energy dissipation during industrial motor deceleration cycles
-Snubber networks — transient voltage suppression across IGBT and MOSFET switching devices in medium and high-voltage converters (non-inductive option)
-Electric vehicle (EV) charging infrastructure — high-power load and inrush resistors in DC fast charging and ultra-rapid charging stations
-DC bus discharge resistors — controlled high-power bleed-down of large DC link capacitor banks at system shutdown
-Industrial power sources — soft-start and inrush current control for large motors, compressors, and heavy industrial machinery
-Energy storage system (ESS) discharge control — resistive discharge networks in large-format battery, flywheel, and supercapacitor installations
-Load banks and test equipment — high-power resistive dummy loads in drive and converter development, factory acceptance testing, and commissioning
-Wind and solar energy systems — load dump and crowbar resistors in large renewable energy inverters and grid-connection equipment
Related Products of the LFH 300W to 2000W Series Metal Clad Resistors
Model: IRH, IRV, ULH, ULV
Resistor type: Metal clad resistor
Description: UL/CE, aluminum housed, chassis mounted
Power Rating: 60W~500W
Resistance (Ω): 0.1~6.8k
Tolerance (%): ±0.5, ±1, ±2, ±5, ±10
TCR (ppm/C): 260 Max.
Model: IRVA
Resistor type: Metal clad resistor
Description: Chassis mounted assembly
Power Rating: 300W-450W
Resistance (Ω): 30~15k
Tolerance (%): ±1, ±2, ±5, ±10
TCR (ppm/C): 260 Max.
Model: IRV, ULV, IRM, ULM600-1200
Resistor type: Metal clad resistor
Description: UL/CE, aluminum housed, chassis mounted
Power Rating: 600W-1.2kW
Resistance (Ω): 0.1~175
Tolerance (%): ±1, ±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):
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.
