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Silicone Coated High Power Wire Wound Adjustable Resistors

Name: Silicone Coated High Power Wire Wound Adjustable Resistors
Brand: Guangdong Qingda Electronic Technology Co., Ltd
SKU: grUYTXRKsGhb
Price: 5.00 USD
Availability: InStock

US$5.00-40.00 10 Pieces (MOQ)

Port:

Zhuhai, China

Payment Terms:

L/C, T/T

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Guangdong Qingda Electronic Technology Co., Ltd

Guangdong, China

Last Login Date:

Aug 04, 2025

Main Products:

Resistor, High Voltage Resistor, Resistance Box, RF Resistor, High Precision Resistor, High Power Resistor

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Product Description

Company Info

Basic Info.

Model NO.

20W 100W 150W 300W 1KW 3KW 10KW 20KW

Material

Ceramic and Metal

Trademark

Qingda

Origin

Guangdong

Product Description

I. Core Structure and Technical Features

1. Materials and Manufacturing Processes

Ceramic Core:
High-frequency ceramic tubes as the base framework, withstanding temperatures **>350°C**, improving heat dissipation efficiency by 20% compared to standard ceramics.
Winding Technology:
Helicoil winding technique using high-temperature alloy resistance wire spiraled around the ceramic core, ensuring low thermal expansion and high stability.
Low-Inductance Design:
Non-inductive winding (inductance <0.1μH) minimizes electromagnetic interference, ideal for high-frequency circuits.
Encapsulation and Protection:
Surface coated with nano-silicone resin or glaze coating, offering high-temperature resistance, flame retardancy (certified UL94 V-0), and protection up to IP54 for harsh environments (humidity, dust).
Lifespan:
Tested endurance **>50,000 cycles (per IEC 60115** standard).

2. High-Voltage and High-Power Performance

Voltage Tolerance:
Supports 0.5kV to 20kV operating voltage, with short-term overload capacity of 5-10× rated power (e.g., a 20kW model can withstand a 200kW/5s surge), meeting transient high-energy demands.
Low-Power Models (20W-300W):
Designed for PCB board-level current limiting.
High-Power Models (1kW-20kW):
Optimized for high-energy scenarios like inverter braking and crane emergency stops.

II. Typical Application Scenarios

Power Range	Application Fields	Technical Compatibility
20W-300W	Instrumentation, Medical Electronics	Low inductance, high precision (±1% to ±5% tolerance)
1kW-3kW	Inverter Energy Braking, Photovoltaic Inverters	Withstand voltage: 2.5kV-10kV; Temperature rise: ≤375ºC
10kW-20kW	Rail Transit Traction Systems, Industrial Load Testing	Supports dynamic braking; Lifespan: >100,000 hours

III. Selection and Usage Guidelines

Resistance Matching Formula

R=V2P(V:System Voltage,P:Power to be dissipated)R = \frac{V^2}{P} \quad (V: \text{System Voltage}, \, P: \text{Power to be dissipated})R=PV2(V:System Voltage,P:Power to be dissipated)
Example:
For a braking system with 710V voltage, a 1kW resistor requires a resistance value of ≈0.5Ω (calculated as R=71021000≈0.5ΩR = \frac{710^2}{1000} \approx 0.5ΩR=10007102≈0.5Ω).

Derating Rules

Ambient Temperature	Derating Factor	Cooling Requirements
≤40°C	0.8-1.0	Natural cooling
40°C-70°C	0.4-0.6	Forced air/water cooling

Selling Point

1.Premium Quality Wirewound Resistor: The 10000W Variable Wirewound Power Resistor is a premium category product, featuring a wire-wound resistor type with ceramic composition. It offers exceptional resistance and stability, ideal for demanding applications.

2.High Power Rating: This wirewound resistor is designed with a wide range of power ratings, covering 10W to 5000W, ensuring adaptability to a variety of power requirements.

3.Robust Construction: The resistor is built with wirewind technology, providing excellent heat dissipation and resistance to mechanical stress. It is ideal for high-load applications and withstands various conditions.

4.ISO9001 and TUV Certification: The resistor is compliant with international quality standards and regulations, including ISO9001-2008 and TUV certifications. This ensures the quality and safety of the product for users.

5.RoHS Compliant: The resistor is also compatible with RoHS (Restriction of Hazardous Substances) regulations, making it environmentally friendly and suitable for use in various industries. Its ceramic composition enhances its performance and durability.

Company Introduction

Established in 2011, Guangdong Qingda Electronic Technology Co., Ltd. holds the status of a high-tech enterprise in China, specializing in export-oriented resistor and inductor fabrication. With a 6,000 square meter industrial facility and ISO 9001 and ISO14001 certifications, the company boasts nearly 2 decades of research and development experience, as well as expertise in marketing, sales, and service. Collaborations with various state-owned enterprises have solidified Qingda's reputation.

Present in over 50 countries, their products span industries such as industrial control, new energy vehicles, wind power generation, elevators, and robotics. Their roster of prominent clients and clients numbering around 5,000 affirm their credibility. Qingda's commitment to humanistic values, social responsibility, and craftsmanship has helped build a harmonious collaboration with clients and suppliers, ensuring customer satisfaction across the board.

Despite our long history, Qingda continues to maintain its position as a leading resistor and inductor manufacturer in China. Our devotion to quality, innovation, and customer satisfaction makes us a reliable partner for businesses around the world.

FAQ

1. who are we?
We are based in Guangdong Province, China, start from 2011,sell to Southern Europe(60.00%),Eastern Europe(15.00%),North America(10.00%),Southeast Asia(10.00%),Western Europe(5.00%). There are total about 51-100 people in our office.

2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;

3.what can you buy from us?
Braking Resistors/High Voltage Resistors,Wirewound Resistors/Power Resistors/Water Cooled Resistors,Variable Resistors/Wirewound Rheostat RF resistor,Load Banks/film resistor Inductor Carbon Film Resistence,potentiometer Shunt Resistor Cement Resistor

4. why should you buy from us not from other suppliers?
Qingda,was founded in 2005, it is one of the first-class resistors and Inductor with international competitiveness in China. It is a national high-tech enterprise and .We have 20 years of experience in design and research and development.

5. what services can we provide?
Accepted Delivery Terms: EXW;
Accepted Payment Currency: USD,EUR;
Accepted Payment Type: MoneyGram,Credit Card,Cash;
Language Spoken: English,Chinese

Address: No. 2357 Huxin Road, Zhuhai, Guangdong, China

Business Type: Manufacturer/Factory

Business Range: Consumer Electronics, Electrical & Electronics

Management System Certification: ISO 9001

Main Products: Resistor, High Voltage Resistor, Resistance Box, RF Resistor, High Precision Resistor, High Power Resistor

Company Introduction: Guangdong Qingda Electronic Technology Co., Ltd was founded in 2011, it is one of the first-class resistors and Inductor with international competitiveness in China. It is a national high-tech enterprise and Zhuhai specialized, special & new enterprise. The production plant covers an area of 6000 square meters.

Qingda continues to implement ISO 9001, ISO14001 management system, with nearly 20 years of professional R & D experience as well as marketing, sales and service experience. We have long-term cooperation with many state-owned enterprises and central enterprises, such as ZTE, , CMIE, CRRC, etc. Also we are the supplier for well-known customers, , and have cumulatively served nearly 5, 000 customers.

Products are exported to 50 countries and regions such as Europe, North America, South America, and Asia, etc., covering industrial control, braking and equipment fields such as new energy vehicles, wind power generation, photovoltaic power generation, rail transit, frequency converters, servo, CNC, elevators, robots, power supplies, ships and docks; The applications of military industry, aviation, data center, communication, telecommunications, universities, colleges and research institutes, etc.

After nearly 20 years of struggle, Qingda has integrated with its customers and suppliers with its humanistic feelings, social responsibility, craftsman spirit, and has also achieved customer satisfaction, employee satisfaction and social satisfaction.

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