Phase Controlled on solid state relays

Electromechanical Relays
, , , ,
1

"Phase Controlled outputs turn ““On”” immediately when input voltage is applied
rather than wait for the Zero-Cross point. These work well for controlling the phase
of the AC wave for applications such as motor speed control or light dimming. "

See Also: Zero Cross on solid state relays.

2

Also, some manufacturers like Panasonic and Crydom refer to this as a “Random” type.