Relay classified according to the use, there are mainly automobile relay, communication relay relay four categories, home appliance relay, machine tool. If according to the contact load classification, mainly has the micro power relay, weak power relays, power relays, power relays in four categories. Relay to the requirement of electrical contact materials for: excellent electrical conductivity, low and stable contact resistance, good electrical wear resistance and excellent resistance to welding. Contact material is the key material in relay, its role in the relay is: when some parameters (current, voltage, temperature, pressure, etc.) to empty the circuit connected or breaking
Silver cadmium oxide is a good anti-adhesion material
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