Fairchild H21A1 Optocoupler (MIL) 30V

Fairchild H21A1 Optocoupler (MIL) 30V

5980-01-005-0295

The H21A1 consists of a gallium arsenide infrared emitting diode coupled with a silicon phototransistor in a plastic housing. The packaging system is designed to optimize the mechanical resolution, coupling efficiency, ambient light rejection, cost and reliability. The gap in the housing provides a means of interrupting the signal with an opaque material, switching the output from an “ON” to an “OFF” state.