H21A1 Datasheet (PDF) Download
Fairchild Semiconductor
H21A1

Description

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

Key Features

  • 0.110 (2.8) 0.091 (2.3)
  • Opaque housing
  • 035” apertures
  • Derate power dissipation linearly 1.33 mW/°C above 25°C
  • RMA flux is remended
  • Methanol or isopropyl alcohols are remended as cleaning agents
  • Dimensions for all drawings are in inches (mm)
  • Tolerance of ± .010 (.25) on all non-nominal dimensions unless otherwise specified