H21A1 Datasheet - Fairchild Semiconductor

H21A1 PHOTOTRANSISTOR OPTICAL INTERRUPTER SWITCH

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 Ø 0.133 (3.4) Ø 0.126 (3.2) (2X) C L 0.39 (1.00) .

H21A1 Features

* 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 flux is recommended. 3. Methanol or isopropyl alcohols are recommended as cleaning agents. 4. Soldering iron tip 1/1

H21A1_FairchildSemiconductor.pdf