Solid State Relay Circuit Schematic. Feel free to use them as a reference. Unlike emr the solid state relay ssr has no moving parts.
Because scr s and triac s are thyristors their inherent hysteresis maintains circuit continuity after the led is de energized until the ac current falls below a. Unlike emr the solid state relay ssr has no moving parts. Solid state relay is a type of switch to activate load by using without any mechanical parts.
Triac is used at the place of coil relay to switch on and off.
Circuit design of solid state relay a red led with a current limiting resistor is used as a power on indicator. A push button is connected between supply and pin 1 of moc3021. Triac is used at the place of coil relay to switch on and off. Relays can be of many types like an electromagnetic relay reed relay thermal relay solid state relay etc.
