S742-X 1 Form A Solid State Relay DESCRIPTION The S742-X is a bi-directional, single-pole, single-throw, normally open multipurpose relay.
The circuit is composed of one LED on the input side which activates an optically coupled IC on the output - controlling the firing angle of two back-to-back SCRs.
This circuit assures no false triggering under most adverse conditions, and a tight zero-volt window not exceeding 5V.
A 300-ohm input resistor in series with the LED is also provided in this circuit.
FEATURES APPLICATIONS • • • • • • • • • Inverse parallel SCR output High transient immunity 600V blocking voltage 1.
2A maximum continuous current Low input control current...

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