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Adjustable Rheostat Sliding Wire Wound High Power Potentiometer High Resistivity 10W 25W 50W 100W 150W

Name: Adjustable Rheostat Sliding Wire Wound High Power Potentiometer High Resistivity 10W 25W 50W 100W 150W
Brand: Guangdong Qingda Electronic Technology Co., Ltd
SKU: gprRAKtYjGVU
Price: 1.00 USD
Availability: InStock

US$1.00-30.00 100 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.

10W 25W 50W 100W 150W

Resistance

Variable Resistor

Material

Ceramic and Metal

Trademark

Qingda

Origin

Guangdong

Product Description

I. Core Parameters and Structural Features

1. Basic Performance

Power Range: 5W-3000W (industrial models support short-term overload up to 5000W).
Resistance Range: 0.1Ω-100kΩ (custom non-standard values available).
Adjustment Method: Single-turn/multi-turn rotary type (linearity ±1%).
Temperature Resistance: -55°C to +350°C (high-temperature ceramic disc substrate).

2. Key Design Elements

Winding Process:
- Nichrome or constantan resistance wire in helical winding (excellent oxidation resistance).
- High-temperature glass glaze coating (arc withstand voltage **>3kV**).
Mechanical Structure:
- Ceramic disc diameter range: 25mm (5W) to 200mm (3000W).
- Sliding contact material: Silver-nickel alloy (contact resistance <0.01Ω).

II. Standard Power Model Specifications

1. Low-Power Range (5W-300W)

Ceramic base + stainless steel components; resistance range 1-1000Ω.
Glass-glazed high-temperature surface withstands -55°C to +315°C.
Mechanical rotation lifespan: 3,000 cycles; torque 0.2-0.5 N·m.
Resistance tolerance ±10%; passes AC 1000V withstand voltage test.

2. High-Power Range (500W-3000W)

Ceramic tube winding with corrugated heat dissipation; UL94 V-0 flame-retardant coating; forced-air cooling compatibility; supports 3× short-term overload.
Temperature coefficient of resistance (TCR) ≤500 ppm/°C; operates at DC 1000V/AC 380V.
Corrugated winding reduces inductance, ideal for dynamic braking and motor control in high-frequency inverter applications.

III. Selection Guidelines

1. Power Matching Principles

Continuous loads: Select 1.5× nominal power (e.g., 300W model for 200W actual demand).
Pulse conditions: Calculate transient energy per IEC 60115 (formula: E = 0.5 × C × V²).

2. Environmental Adaptation

High humidity: Prioritize epoxy-encapsulated models (IP67 protection).
High-frequency circuits: Use non-inductive winding (parasitic inductance <10 nH).

3. Failure Prevention

Contact maintenance: Clean oxide layer every 500 hours (use anhydrous ethanol).
Cooling requirements:
- **>500W**: Mandatory forced-air cooling (airflow **≥2 m/s**).

IV. Typical Applications

Industrial Control:
- Motor soft-start resistance adjustment (50W-200W models).
- Welding machine current presetting (200W-1000W tapped models).
New Energy Systems: Photovoltaic array simulation loads (1000W-3000W high-voltage models).
Lab Equipment: Adjustable power supply voltage division circuits (5W-25W precision models).

V. Application Risk Mitigation

1. Thermal Management

**>500W models**: Surface temperature reaches 180°C under full load; use silicone-insulated wires and avoid flammable materials.
**>200W models**: Reserve **≥15 cm³/W** heat dissipation space; pair with aluminum fins.
3000W models: Reserve **≥20 cm³/W** space; use aluminum alloy heat sinks.

2. High-Frequency Interference Suppression

Address inherent inductance of wirewound structures; use non-inductive winding or parallel RC snubber circuits for **>10 kHz** applications.

3. Mechanical Installation Standards

Rotary shafts require anti-torsion pins; add rubber damping pads in high-vibration environments.
3000W models: Secure with M8 stainless steel brackets due to size/weight.

Selling Point

1.High Power Capability: This 1500W variable rheostat is capable of handling a wide range of power loads, ranging from 25W to 3000W. Its robustness and scalability make it suitable for various applications, including load testing and load equipment usage.

2.Precision Adjustment: The rheostat can be easily adjusted via a black knob, allowing users to fine-tune the power output and resistance level to their desired setting.

3.ISO9001:2008 Certified: This product has achieved international quality management system certification, ensuring that it meets rigorous standards in terms of quality, safety, and environmental protection.

4.Reliable Ceramic Composition: The variable resistor is crafted using a ceramic composition technology, providing enhanced thermal stability, low resistivity, and consistent performance over time.

5.Wide Operating Range: This wire-wound resistor can operate in temperature conditions ranging from -80ºC to 150ºC, showcasing its durability and reliability in varying environmental circumstances.

Company Introduction

Established in 2011, Guangdong Qingda Electronic Technology Co., Ltd is a renowned national high-tech enterprise with international competitiveness in resistor and inductor production. ISO 9001 and ISO14001 certified, we have over 20 years of experience in R&D, marketing, sales, and service.

As a specialized, special, and new enterprise in Zhuhai, Qingda collaborates with leading state-owned and central enterprises like ZTE and CMIE. Our esteemed client base includes renowned firms, and we have served nearly 5,000 customers.

Exported to 50 countries and regions worldwide, our products range from industrial control to renewable energy vehicles, and encompass applications in power generation, rail transit, servo, CNC, elevators, robotics, and ship & dock engineering. Our endeavors in the military, aviation, data center, communication, and education sectors have also garnered recognition.

With a commitment to humanistic values, social responsibility, and craftsmanship, Qingda has established harmonious relationships with customers, suppliers, employees, and the wider society. We continuously strive for customer, employee, and social satisfaction.

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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