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10-28-2010

Solid State Relay Requires Only 50uA Drive Current

David Johnson

This circuit demands a control current that is 100 times smaller than that needed by a typical optically isolated solid state relays. It is ideal for battery-powered systems. Using a combination of a high current TRIAC and a very sensitive low current SCR, the circuit can control about 600 watts of power to load while providing full isolation and transient protection.

Solid State Relay Requires Only 50uA Drive Current
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