WH116AK-3R

WH116AK-3R High-Power, High-Current Contact-Type Impedance Adjustment Component

Product Overview

The WH116AK-3R is a contact-type impedance adjustment component specifically designed to handle high-power and high-current loads. It offers two switch configurations—SPDT and SPST—to meet diverse circuit control requirements. Featuring silver contacts, it effectively increases the switch’s current-carrying capacity. By adjusting the effective resistance, it enables current shunting or voltage division in circuits, allowing direct control of high-power circuits without the need for complex semiconductor inverters. With exceptional heat resistance and surge-current protection, it can operate stably under extreme conditions. The product has passed industrial-grade certifications such as VDE, CB, and NEMKO, with electrical performance and safety meeting stringent industry standards. It effectively addresses the failure issues commonly encountered by conventional electronic potentiometers in high-current applications, providing a reliable impedance adjustment solution for high-power circuit systems.

Technical Principle

The WH116AK-3R operates on the principle of contact-type impedance adjustment. Its core utilizes a silver-contact structure; compared to conventional contact materials, silver boasts superior conductivity and wear resistance, significantly enhancing the switch’s current-carrying capacity while reducing energy loss and heat generation caused by contact resistance. By adjusting the effective length of the resistor’s connection, the total resistance in the circuit is modified, enabling precise control over current distribution or voltage division, thus fine-tuning circuit parameters. This purely resistive adjustment method eliminates the need for semiconductor inverters, allowing direct integration into high-power circuits for control, thereby avoiding the reliability shortcomings of semiconductor components under high-power conditions and catering to the rugged control demands of heavy industrial equipment.

Key Performance Parameters

1. Rated Power Range: 1000W to 2500W
2. Rated Current Capacity: 4A to 10A
3. Insulation Resistance: ≥ 100MΩ (DC 500V)
4. Switch Contact Resistance: ≤ 50mΩ
5. Switch Configurations: SPDT and SPST options available
6. High-Temperature Stability: Can operate continuously at full load for ≥ 30,000 cycles in extreme temperatures up to 100°C without electrical breakdown
7. Certifications: VDE, CB, NEMKO industrial-grade certifications

Core Advantages

1. High-Power, High-Current Handling: Supports rated power from 1000W to 2500W and rated current from 4A to 10A, directly compatible with high-load circuits in heavy industrial equipment, eliminating the need for additional power amplification components and simplifying circuit design.
2. Durable Silver-Contact Design: Utilizes silver contacts to reduce switch contact resistance, enhance current-carrying capacity, minimize contact wear and heat generation, and extend component lifespan.
3. Exceptional Heat Resistance and Surge Protection: Boasts outstanding heat resistance, capable of continuous full-load operation for over 30,000 cycles in extreme temperatures up to 100°C without electrical breakdown, and exhibits strong surge-current protection, ensuring excellent stability against sudden circuit surges.
4. No Need for Semiconductor Inverters: With its purely resistive adjustment design, it can directly control high-power circuits without requiring complex semiconductor inverter setups, reducing system costs and maintenance complexity.
5. Authoritative Industrial Certifications: Certified by VDE, CB, NEMKO, and other industrial standards, ensuring compliance with international electrical safety norms and meeting regulatory requirements for overseas markets and high-end industrial applications.
6. Low Maintenance Costs: Compared to conventional electronic potentiometers, this product offers greater stability and lower failure rates, reducing overall maintenance costs by more than 40% and minimizing equipment downtime and repair expenses.

Core Product Value

1. Solves the problem of potentiometer failure in high-current scenarios, preventing issues such as resistor wire burnout, substrate carbonization, and brush welding, thereby enhancing the reliability and stability of circuit systems.
2. Simplifies the design of high-power circuit control, eliminating the need for additional semiconductor inverters and reducing overall system cost and complexity.
3. Ensures long-term stable operation under high-temperature, high-load conditions, decreasing equipment maintenance frequency and costs while boosting production efficiency.
4. Backed by authoritative certifications, it meets compliance requirements for industrial equipment exports and high-end applications, helping companies expand their market reach.

Target Customer Groups

Heavy machinery manufacturers, power equipment producers, traditional old-style welding equipment makers, and developers of laboratory high-voltage power supplies—these enterprises typically deal with high-power, high-current circuit control and have stringent demands for the load-bearing capacity, stability, and reliability of impedance adjustment components. The WH116AK-3R’s performance and design perfectly align with their production and R&D needs.

Typical Application Scenarios

1. Rough Temperature Adjustment for Industrial Electric Furnaces: Industrial electric furnaces feature high heating power and large currents. The WH116AK-3R can adjust impedance to modify heating current, enabling coarse temperature regulation to meet industrial production needs.
2. Speed Regulators for Older DC Motors: Many older DC motor speed control systems rely on impedance adjustment to regulate current. The WH116AK-3R’s high-current capacity and stability make it well-suited to these applications, ensuring smooth motor speed regulation.
3. High-Power Analog Power Supply Load Testing: In laboratories or power supply manufacturers conducting high-power analog load tests, this product can simulate various load impedances, precisely adjusting current and voltage in test circuits, providing a reliable adjustment component for power performance testing.
4. Current Regulation for Welding Machines: Welding machines operate at high currents and power levels. This product effectively regulates welding current, adapting to different material types and thicknesses to ensure stable welding processes.
5. High-Power Dimmer Controls: In industrial lighting, stage lighting, and other high-power dimming applications, this product can control current in lighting circuits through impedance adjustment, regulating light brightness to meet the demands of high-power lighting loads.

Solutions to Industry Pain Points

Conventional electronic potentiometers often encounter issues such as resistor wire burnout, substrate carbonization, or brush welding when applied in high-power, high-current scenarios due to excessive localized Joule heating, leading to circuit failures, equipment downtime, and increased maintenance costs and production losses. The WH116AK-3R addresses these pain points with specialized design, employing a high-power load-bearing structure and silver contact materials to enhance thermal resistance and current-carrying capacity. It can operate continuously at full load for over 30,000 cycles in extreme temperatures up to 100°C without electrical breakdown, completely resolving the failure problems commonly seen in ordinary potentiometers under high-current conditions. Moreover, it eliminates the need for complex semiconductor inverters, reducing system design costs and maintenance difficulty, thus providing a stable and reliable solution for high-power circuit control.

Common Questions FAQ

Q1: What switch configurations does the WH116AK-3R support?

A: The WH116AK-3R offers two switch options—single-pole double-throw (SPDT) and single-pole single-throw (SPST)—to meet the control needs of various high-power circuits.

Q2: What are the power and current ranges of the WH116AK-3R?

A: The rated power range is 1000W to 2500W, and the rated current capacity is 4A to 10A, suitable for all kinds of heavy industrial high-power load applications.

Q3: Does using the WH116AK-3R to control high-power circuits require pairing with a semiconductor inverter?

A: No. The WH116AK-3R employs a purely resistive adjustment structure, enabling direct control of high-power circuits without the need for complex semiconductor inverter components, thereby reducing system costs and maintenance difficulty.

Q4: What certifications does the WH116AK-3R hold?

A: The product holds industrial certifications such as VDE, CB, and NEMKO, with electrical safety performance meeting international standards, satisfying compliance requirements for overseas markets and high-end industrial applications.

Q5: How does the WH116AK-3R solve the issue of ordinary potentiometers easily failing under high-current conditions?

A: The WH116AK-3R adopts a silver-contact structure and a high-power load-bearing design, boasting excellent heat resistance and surge-current protection. It can operate continuously at full load for over 30,000 cycles in extreme temperatures up to 100°C without experiencing electrical breakdown, effectively avoiding failures such as resistor wire burnout, substrate carbonization, or contact welding.