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Precautions for relay purchase

When buying relays, everyone will be confused. What kind of relays should we choose? First of all, you should consider what kind of relay is the first one. There are many kinds of relays, mainly including electromagnetic relay, solid-state relay, temperature relay, reed relay, time relay and high-frequency relay. Therefore, we need to first determine what kind of relay we want to choose.

On relay contact

Contact is an important part of relay. Their performance is greatly affected by the following factors, such as contact material, applied voltage and current value (especially the voltage and current waveform when the contact is excited and de excited), type of load, working frequency, atmospheric environment, contact configuration and jump. If any of these factors can not meet the predetermined value, problems such as metal deposition between contacts, contact welding, wear, or rapid increase of contact resistance may occur.

Relay and its main function

Relay is an automatic switch element with isolation function, which is widely used in remote control, telemetry, communication, automatic control, electromechanical integration and power electronic equipment, and is one of the important control elements.