A solid-state relay (SSR) is an electronic switching device that switches on or off when an external voltage (AC or DC) is applied across its control terminals . It serves the same function as an electromechanical relay, but has no moving parts and therefore results in a longer operational lifetime. Specifications: 220V AC Single Phase SSVR 40A Solid State Voltage Regulator Relay Resistance Regulating Module Model: SSVR 40A Current :40A Name : MGR-R40A Load voltage :220VAC Dimension: 57*32*45mm Each bid for 1pcs. Package Includes: 1 x  Solid State Voltage Regulator Relay Facebook Instagram Pinterest