PM Contact Tips

Product Highlights

-Excellent product quality

Stable performance, high breaking strength, excellent resistance to electric arc erosion, and uniform microstructure.

-Customized Products

Diversified materials, complete product specifications and types, custom development of material and shape according to customer requirement, all products can be covered with solder, fully meet welding automation needs of customer.

-Wide Range of Application

Product application covers wide ranges of MCB, MCCB, ACB.

-Solder Coated

All products can be coated with solder, fully meeting the customer's automation welding needs.

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Product Description

Powder metallurgy contact materials (also known as electrical contacts) are key contact materials used in electrical equipment and instruments for currents on and off. By currents' on and off achieving circuit protection and control, and it is widely used in electrical apparatus such as high-voltage switches. This material is made into a two-phase composite material using powder metallurgy technology, with copper or silver as the matrix phase providing electrical and thermal conductivity, and the other phase being a high melting point metal or compound to enhance voltage resistance and arc erosion resistance. The application can be divided into three categories: high-voltage types often use tungsten based materials (such as CuW), low-voltage types mainly use silver based materials (such as AgCdO), and vacuum types use CuW or WCCu made by high vacuum technology. The core manufacturing processes include infiltration, powder mixing and sintering, and hot processing, which balance conductivity, resistance to fusion welding, and wear resistance performance through material combination and process optimization.

The powder metallurgy method has become a critical technology in the manufacturing of electrical contact materials due to its ability to produce components with high precision, excellent wear resistance, and tailored properties. It is especially advantageous for producing contact materials like AgW, CuW, AgNi, and AgC, which require a balance of conductivity and mechanical strength. Powder metallurgy allows for precise control over material composition and microstructure, enhancing the performance and lifespan of contact products in demanding electrical applications, such as circuit breakers and relays.

Main Materials

AgW: High melting point and hardness, excellent resistance to arc erosion, widely used in various low-voltage circuit breakers, heavy-duty switches, etc.

AgWC:High melting point and hardness, stable contact resistance, great resistance to arc erosion and oxidation, high corrosion-resistant. It is mainly used in various low-voltage circuit breakers, especially DC circuit breakers, leakage protection circuit breakers, heavy-duty switches, etc.

AgWCC：Good electrical and thermal conductivity, low hardness and contact resistance, excellent anti fusion welding ability and long electrical lifespan, and is widely used in MCCB and ACB.

AgNiC：Good conductivity and thermal conductivity, low and stable contact resistance, excellent electrical lifespan and resistance to fusion welding, widely used in ACB.

AgC: Extrusion technology can be made in vertical fiber structure and parallel fiber structure. Low resistance, good electrical and thermal conductivity, corrosion resistance, low and stable contact resistance, good resistance to fusion welding and arc erosion, low temperature rise, widely used in various MCB and MCCB.

Switches

Circuit Breakers

Sliding Electric Brushes

AgC

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AgNiC

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AgWC

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AgWCC

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AgZnO

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CuW

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