Overview
Overview
The high-power resistor series is engineered for high-energy dissipation and precision-control applications, widely used in industrial automation, rail transit, new energy, power electronics and heavy equipment. The portfolio covers everything from individual resistors to system-level resistor cabinets, supporting multiple structures and cooling methods for stable long-term operation under high load, frequent surges and demanding conditions. Through optimized resistance materials and thermal-management design, this series delivers excellent thermal stability, surge tolerance and high reliability — meeting critical requirements for braking, discharge, current limiting and energy absorption. From single components to integrated systems, it combines high pulse capability with long-term stability for new-energy, industrial drive and rail-transit applications.
Key Features
Full Power Coverage
- Covers 50W ~ 100kW+ with modular expansion
- Single-unit through system-level cabinet integration
Outstanding Pulse & Overload Capability
- ≥ 10× rated power short-duration surge (typical 5s)
- Ideal for frequent braking and energy regeneration
Multiple Cooling Solutions
- Natural / forced air / water cooling available
- Optimized thermal design for any installation environment
Reliable Mechanical Design
- Ceramic-wirewound / alloy elements with high-temperature aging resistance
- Vibration- and shock-resistant construction for harsh industrial environments
Smart Protection & System Integration
- Integrated thermostat, PTC / NTC monitoring options
- Full cabinet solutions (enclosure, wiring, control)
Standards & Customization
- Compliant with IEC 60322 and other international standards
- Full customization of resistance, power, structure and interface
Applications
Typical Applications
Rail Traction
Crane Regen Braking
Induction Furnaces
Solar Grid-Tie
Offshore Wind
Energy-Storage PCS
Compare High Power Resistor Models
Side-by-side specs for every model in this family — power range, resistance range, tolerance, operating temperature and key applications.
| Specification | 10-10000W · Custom ResistanceHigh-Power Corrugated Braking Resistor | 50-6000W · Custom ResistanceHigh-Power adjustable Resistor | 10-500W · Custom ResistanceGlass Glaze Resistor |
|---|---|---|---|
| Series Model | RX20 Series | — | — |
| Power Range | 20W ~ 10000W (covers 20W ~ 6kW standard range, supports up to 10kW high-power) | 25W ~ 10kW | 8W ~ 500W |
| Resistance Tolerance | ±5% standard (custom ±1% / ±2%) | — | — |
| Surface Finish | Vertical corrugated winding | — | Eco-friendly lead-free glaze · high-temperature / moisture / corrosion resistant |
| Coating Material | High-temperature flame-retardant coating (anti-oxidation) | — | — |
| Bracket Material | reinforced galvanized stainless-steel bracket | — | — |
| terminal Finish | Two-leg terminal · end-face insulation pad | — | — |
| Thermal design | Vertical corrugated design enhances thermal dissipation and reduces parasitic inductance | — | — |
| Operating Temperature | -55℃ ~ +275℃ | — | — |
| Typical Applications | VFD braking / elevator regenerative braking / crane braking / industrial automation / power-supply testing | — | Electrical Equipment / Electronic Instruments — Used in DC or low-frequency AC circuits for voltage drop, voltage division, current sharing or load purposes |
| Product Type | — | wirewound resistors · High-Power adjustable | — |
| Adjustment | — | Conductive adjustment ring · slides left/right for continuous adjustment | — |
| Adjustment Notes | — | Disconnect power before adjusting manually | — |
| Wirewound | — | Carefully selected high-quality wirewound · tight tolerance | High-quality alloy wire · uniformly flat-wound (reduces parasitic inductance) |
| Operating Characteristics | — | low noise · stable and reliable · low TCR · thermally stable | — |
| Structure | — | ceramic core + galvanized bracket + Two-leg terminal | — |
| Applications | — | Lab testing / Load simulation / Motor control / Power supply adjustment | — |
| Product Series | — | — | RX20 / RXG20 / ZG11 Glazed Enamel Resistor |
| Tube Material | — | — | 75-grade ceramic tube · high strength · good electrical performance |
| terminal post | — | — | Tin-plated copper · low hardness · excellent conductivity · minimizes energy loss |
| Surface Temperature Rise | — | — | ≤ +275°C (derates to 0% at 315°C) |
| Solderability | — | — | ≥ 95% (235±5℃ · 2±0.5s) |
| Available styles | — | — | Glazed / adjustable / With Bracket |
| View details | View details | View details | View details |
Frequently asked questions
What is the difference between continuous and pulse power rating?
Continuous (W) is the steady-state power the resistor can dissipate indefinitely at rated ambient. Pulse rating (peak kW or kJ for a defined ms duration) is much higher — for braking applications, our edge-wound and corrugated tube units handle 10–20× continuous power for 1–10 seconds. Always specify your duty cycle (on time, off time, repetition rate) when sizing.
Can high-power resistors be connected in parallel or series banks?
Yes — both topologies are common to scale resistance and power. For parallel banks, match resistance values within ±2% to avoid current imbalance and use equal-length, low-inductance bus bars. For series strings, voltage rating per element must exceed total bus voltage / number of elements with margin. We design custom assemblies up to 100 kW with internal busing and a single connection interface.
What cooling methods do you support — natural, fan or water?
All three. Natural convection works up to about 5 kW per cabinet. Forced air (built-in axial fans, thermostat-controlled) takes us to 30–50 kW with much smaller footprint. Water-cooled stainless tube units handle 100 kW+ with very low surface temperature, ideal for indoor or marine installations. Tell us your application and we'll recommend the most economical option.
Does mounting orientation affect the rated power of high-power resistors?
Yes. Datasheet ratings assume horizontal mounting with terminals at the side and free convection above. Vertical mounting with terminals up may require 10–20% derating depending on model. Stacking units closer than 50 mm typically requires 15–25% derating or forced air. Always provide your enclosure layout for engineering review on orders >10 kW.
What insulation class do high-power braking resistors use?
Standard product is Class F (155°C) with 2.5 kV AC withstand voltage element-to-case for 60 seconds. Class H (180°C) with 4 kV withstand is offered for traction and EV applications. Cabinet-mount banks add Class B insulation between elements for added safety. Withstand voltage tested 100% on production line.
Sample Request
Sample Request
Standard samples are provided free of charge in reasonable quantities (shipped within 2–3 business days). Custom samples are delivered within 2–4 weeks. Please use the form on the right to tell us:
- Company and contact details
- Target part number or key specs (power / resistance / package)
- Application scenario and estimated annual volume
- Shipping address and expected delivery date
📧 You can also email us directly at info@resistor-factory.cn / 13650089870
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