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H21A2 - PHOTOTRANSISTOR OPTICAL INTERRUPTER SWITCH

Description

The H21A1, H21A2 and H21A3 consist of a gallium arsenide infrared emitting diode coupled with a silicon phototransistor in a plastic housing.

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 1/16” (1.6mm) minimum from housing. 2 3 2 1 3 4 PIN 1 ANODE PIN 2.

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Datasheet Details

Part number H21A2
Manufacturer Fairchild Semiconductor
File Size 104.21 KB
Description PHOTOTRANSISTOR OPTICAL INTERRUPTER SWITCH
Datasheet download datasheet H21A2 Datasheet
Additional preview pages of the H21A2 datasheet.

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Full PDF Text Transcription

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H21A1 / H21A2 / H21A3 PHOTOTRANSISTOR OPTICAL INTERRUPTER SWITCH PACKAGE DIMENSIONS 0.972 (24.7) 0.957 (24.3) 0.472 (12.0) 0.457 (11.6) C L 0.249 (6.35) 0.243 (6.15) + E D + DESCRIPTION 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) 0.34 (0.85) 0.755 (19.2) 0.745 (18.9) .073 (1.85) .133 (3.38) 0.129 (3.3) 0.119 (3.0) Optical C L 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. 0.433 (11.0) 0.422 (10.
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