H21A1 switch equivalent, phototransistor optical interrupter switch.
0.110 (2.8) 0.091 (2.3)
* Opaque housing
* Low cost
* .035” apertures
* High IC(ON) 1. Derate power dissipation linearly 1.33 mW/°C above 25°C. 2. RMA fl.
The H21A1, H21A2 and H21A3 consist 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
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