Opto-Electronic Interrupter Switch with Transistor Sensors


The H21A series of opaque photointerrupters are single channel switches consisting of a Gallium Arsenide infrared emitting diode and a NPN silicon photo transistor mounted in a polycarbonate housing. The package is designed to optimize the mechanical resolution, coupling efficiency, ambient light rejection, cost and reliability. Operating on the principle that objects opaque to infrared will interrupt the transmission of light between an infrared emitting diode and a photo sensor switching the output from an "ON" state to an "OFF" state.

Features:
  • High gain
  • 3mm gap between LED and detector
  • Polycarbonate case protected against ambient light
  • Forward current: 50mA
  • Reverse voltage: 5V
  • Power dissipation: 75mW
  • 4-pin package with tab

    • Product Identification

    Family:H21A1

    Dimensions & Appearance

    Height:11 mm
    Width:6.35 mm
    Length:24.7 mm
    Mounting:Tab/.1"PCB

    Operating conditions

    Maximum Operating Temperature:100°C
    Minimum Operating Temperature:-55°C

    Packaging

    Packaging:Rail

    Input

    Input Voltage:1.2 V

    Output

    Output Device:Phototransistor

    Features

    Gap Width:3 mm
    Maximum Emitter Collector Voltage:5 V
    Pins:4
    Maximum Reverse Voltage:6V
    Maximum Rise Time:8 us
    Maximum Collector Emitter Voltage:30 V
    Maximum Fall Time:50 us
    Maximum Collector Current:20 mA
    Maximum Forward Current:50 mA
    Power Dissipation:150 mW
    Configuration:Photointerupter
    Peak Wavelength:940 nm
    ,