Power Wirewound Resistor

The Power Wirewound Resistor from RST Electric combines traditional tubular construction with modern materials to create a versatile, high-reliability component for industrial and commercial power systems. At its core, this Tubular Wirewound Resistor features a precision resistance wire wound around a high-purity ceramic tube, selected for its excellent thermal conductivity, mechanical strength, and electrical insulation properties.

The element is protected by a high-temperature silicone coating that provides resistance to moisture, thermal shock, and environmental contaminants while maintaining excellent heat dissipation. This construction results in a Power Wirewound Resistor capable of continuous operation at surface temperatures up to +200°C, with dielectric strength tested to AC 3kV for 5 seconds. The winding pattern is optimized to minimize inductance, making this product suitable for AC and pulse circuits where fast response and low phase shift are required.

With power ratings spanning from 50W to an impressive 10kW per unit, this High Power Wirewound Resistor serves as a cost-effective solution for applications ranging from snubber circuits in power supplies to dynamic braking in motor drives and load banks in test equipment.

As a trusted Power Wirewound Resistor manufacturer in China, RST Electric combines over 10 years of resistor engineering expertise with rigorous quality control to deliver components that meet the demanding requirements of modern power electronics.

Technical Specification

Product Features

1.Precision Wirewound Construction – High-stability resistance wire wound on high-purity ceramic tube ensures accurate resistance values and excellent long-term stability .

2.High-Temperature Silicone Coating – Protective coating withstands continuous operation up to +200°C, providing resistance to moisture, thermal shock, and environmental contaminants .

3.Inherent Non-Inductive Design – Optimized winding patterns minimize inductance, making these resistors suitable for AC and pulse circuits without significant phase shift .

4.Wide Power Range – From 50W to 10kW per unit, covering diverse applications from low-power snubbers to high-power load banks .

5.Excellent Dielectric Strength – Tested to AC 3kV for 5 seconds, ensuring safe operation in high-voltage circuits .

6.Mechanical & Environmental Resilience – Robust construction withstands vibration, thermal cycling, and harsh industrial environments .

7.Flexible Termination Options – Available with various lead styles and mounting brackets for easy integration into existing designs .

8.Low TCR Options – Temperature coefficients as low as ±50 ppm/°C available for precision applications requiring minimal resistance drift .

9.Custom Configurations – Special resistance values, tolerances, and mechanical modifications available to meet OEM requirements .

10.Cost-Effective Power Handling – Provides an economical solution for high-power dissipation without the complexity of liquid cooling or massive heat sinks .

Product Applications

Drawing and dimensions

Package and shipment

FAQ

Question: What are your company's core advantages?

Answer: We are a local and legitimate manufacturer in China. We have been dedicated to the research and manufacturing of Power Wirewound Resistors for over 10 years, specializing in the field of tubular wire-wound components. We are not a trading intermediary. We can fully control the entire process from ceramic core procurement, winding, coating, and testing independently. This not only ensures stable quality but also eliminates the middle环节. We offer transparent factory direct supply prices， allowing customers to balance high quality with low cost.

Question: What guarantees are there for production capabilities and quality inspection?

Answer: We have an ISO 9001-certified factory and specialized equipment for precise winding. Our production process is standardized and strictly controlled. Before each power line winding resistor leaves the factory, 100% electrical testing is completed. Combined with thermal imaging verification, it ensures uniform heat dissipation without hot spots. At the same time, we have a professional engineering team dedicated to the multi-industry applications of high-power resistors, precisely controlling the product's compatibility.

Question: What industries do your company mainly serve?

Answer: We have extensive global supply experience and are trusted suppliers for global power supply, motor drive, and medical equipment enterprises. Our products have been exported to 40 countries including Germany, the United States, Japan, South Korea, and Italy. We have rich experience in power electronics, renewable energy, and industrial automation, and can precisely meet the core needs of different industry customers.

Question: Does your company offer customized services for power wirewound resistors?

Answer: We provide comprehensive customization services to meet the individualized needs of different industries. The specific customizable parameters for Power Wirewound Resistor include: power ranging from 50W to 10kW (can be upgraded as needed), resistance value from 0.1Ω to 10kΩ (supports special resistance values), tolerance, temperature coefficient, coating type, wiring method. Additionally, we can provide a wire-wound design without inductance, suitable for fast-switching scenarios.

Question: What are the product delivery time and after-sales guarantee?

Answer: The delivery time varies depending on the product specifications. The standard model has a delivery period of 10-20 working days, while the customized model takes 20-30 working days. Each batch of products comes with complete technical documents. We offer a 18-month warranty service. During the warranty period, we can provide remote fault diagnosis and spare parts delivery. Our professional team can also provide integration technical support for power supplies, drivers, and other equipment, ensuring full protection for our customers throughout the process.