Sensata / Crydom CKRA4820 Mains 20A rms Solid State Relay Contactor DIN Rail SCR 480V Max.

The input is Mains voltage controlled and will then switch up to 20A and 480VAC.

See here for data sheet: https://www.mouser.co.uk/datasheet/2/657/sensata_ckr48_series_din_rail_mount_relay_datashee-2933800.pdf

Suitable alternative to a traditional electro-mechanical contactor but much more reliable.

Unused old stock. Slight marks from storage etc.