Tungsten-copper alloy contact refers to an electrical contact component (i.e., contact) made of tungsten-copper alloy material used in high-voltage or high-current switching equipment such as electrical switches, circuit breakers, and relays. It is an important functional component in high-temperature and high-current environments, mainly used for conduction and withstanding the electric arc generated during switching operations.
1.Material Composition of Tungsten-Copper Alloy Contacts
Tungsten (W): High melting point (3422°C), high hardness, mainly providing arc ablation resistance and mechanical strength.
Copper (Cu): Good electrical conductivity, high thermal conductivity, mainly providing excellent electrical conductivity and heat dissipation performance.
Alloy ratio: Typically tungsten content is between 50% and 90%, with copper supplementing electrical and thermal conductivity.
2.Functional Characteristics of Tungsten-Copper Alloy Contacts
High-temperature resistance: Tungsten can withstand instantaneous high temperatures from switching arcs, not easily melting or deforming.
Good electrical conductivity: The copper component ensures the contact's electrical conductivity, reducing resistance.
Fast heat dissipation: Copper's good thermal conductivity helps quickly reduce local temperature at the contact.
Arc ablation resistance: Tungsten-copper alloy can withstand multiple breaking arcs, extending contact lifespan.
High mechanical strength: Tungsten provides hardness and wear resistance, making the contact less prone to wear or cracking during switching operations.
3.Typical Applications of Tungsten-Copper Alloy Contacts
High-voltage circuit breaker contacts
Relay and contactor contacts
Arc furnace and vacuum switch contacts
Various switching equipment requiring resistance to high-temperature arcs and high currents.
