What are the classifications of power relays?

1. Classification according to voltage level: Power relays are divided into low-voltage relays and high-voltage relays. Low-voltage relays are suitable for circuits with voltages less than 250V, and high-voltage relays are suitable for circuits with voltages greater than 250V.
2. Classification according to capacity: Power relays are divided into small power relays and high power relays. Low-power relays are suitable for circuits with loads less than 1KW, and high-power relays are suitable for circuits with loads greater than 1KW.
3. Classification according to structure: Power relays are divided into mechanical relays and semiconductor relays. Mechanical relays have a simple structure but a short lifespan. Semiconductor relays have a longer life, but are more expensive.