LCA 1000W to 4200W Series High Power Metal Clad Resistor Assemblies
Multi-element low-cost assembly
1kW–4.2kW power rating (free air)
High-power inverter braking applications Motor drives & industrial power sources –55°C to +200°C operating range
LCAH (horizontal) & LCAV (vertical) configurations
100% RoHS compliant
What are the LCA 1000W to 4200W Series High Power Metal Clad Resistor Assemblies?
The LCA series is a family of cost-optimised, high-power metal clad resistor assemblies engineered specifically for high-power inverter braking units and large industrial motor drive systems where maximum wattage in free air is the primary design requirement. Each LCA assembly is comprised of two, three, or four high-power wire wound metal clad resistor elements housed within partial steel end covers — a practical and efficient construction approach that minimises material cost and assembly time without reducing thermal or electrical performance. The steel end covers are powder-coated for durability and corrosion resistance.
Available in two mounting orientations — LCAH (Horizontal) and LCAV (Vertical) — the series spans sixteen models ranging in free-air power rating from 1.0kW to 4.2kW, making the LCA the highest continuous free-air power rating catalogue product in the RMS metal clad resistor range. The horizontal LCAH configurations (LCAH3200 through LCAH11200) cover 1.0kW to 2.3kW in free air, while the vertical LCAV configurations (LCAV9600 through LCAV16800) extend the range from 3.0kW to 4.2kW — with the V-orientation's greater element count enabling the highest power densities. The model number suffix reflects the combined element wattage of the internal resistors.
The resistance range spans 0.6Ω to 864Ω for inductive winding and 0.1Ω to 222Ω for non-inductive winding depending on model, with tolerance options of ±5% and ±10% covering general industrial braking and load control specifications. The operating temperature range of –55°C to +200°C and a TCR of ±260 ppm/°C maximum ensure stable performance across the demanding thermal environments encountered in motor control cabinets and outdoor industrial installations.
Characterisation testing confirms reliable performance across moisture resistance (40°C / 95% RH for 500 hours), thermal shock (65°C for 30 minutes / –90°C for 30 minutes, 25 cycles), vibration (10Hz–55Hz, 2 hours per axis), moisture load life (40°C / 95% RH, 0.1× rated power, 500 hours), and extended full-power load life (1.5 hours on / 30 minutes off for 500 hours) — confirming the electrical stability and mechanical robustness required for continuous industrial braking duty.
LCA 1000W to 4200W Series High Power Metal Clad Resistor Assemblies Specifications
A practical overview for engineers and procurement teams evaluating resistive solutions.
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.
Applications of the LCA 1000W to 4200W Series High Power Metal Clad Resistor Assemblies
Where RARA metal clad resistors are deployed in the field.
-High-power inverter braking units — the primary application; dynamic braking resistor assemblies in large industrial variable frequency drives and servo systems
-Motor drives — sustained multi-kilowatt braking and load resistors where single-body units cannot deliver the required free-air wattage
-Regenerative braking systems — high-energy dissipation during deceleration in large industrial cranes, hoists, lifts, winders, and conveyor drives
-DC bus discharge resistors — fast, controlled multi-kilowatt bleed-down of large DC link capacitor banks at system shutdown
-Energy storage system (ESS) discharge control — high-power resistive discharge networks in large battery, flywheel, and supercapacitor installations
-Wind and solar energy inverters — load dump and crowbar resistors in large renewable energy generation and grid-tie converter platforms
-Industrial load banks — high-power resistive dummy loads for drive and converter factory acceptance testing, site commissioning, and periodic load testing
-Marine and offshore power management — multi-kilowatt load resistors in vessel propulsion, power conditioning, and shore power connection equipment
-Railway and traction power electronics — sustained high-power braking resistors in traction inverter, auxiliary converter, and energy recovery systems
Related Products of the LCA 1000W to 4200W Series High Power Metal Clad Resistor Assemblies
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.
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: MCS
Resistor type: High Power Braking
Description: Industrial
Power Rating:2kW-3.4kW
Resistance (Ω): 0.1~9k
Tolerance (%): ±1, ±5, ±10
TCR (ppm/C):
Model: MBVA
Resistor type: Metal clad resistor
Description: Assembly
Power Rating: 3.3kW-8.5kW
Resistance (Ω): 0.5~100
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.
