Latching Ac Solid-State Relay

  
Latching is obtained by storing the gate trigger energy from the preceding half cycle in the capacitors. Powe
Latching Ac Solid-State Relay - schematic

r must be interrupted for more than one full cycle of the line to ensure turn-off. Resistor R and capacitor C are chosen to minimize dissipation, while assuring triggering of the respective SCRs for each cycle. A pulse of current, over 10 ms duration into the H11C4 IRED, ensures triggering the latching relay into conduction.




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