Photointerupter IR 3.3mm Gap 150mW Tab/PC Mount

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$1.49 ea

153 In Stock
More Available – 3 weeks


  • Jameco Part no.: 320901
  • Manufacturer: James Electronics
  • Manufacturer no.: H21A3
  • HTS code: 8541408000
  • Web Exclusive
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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
  • 3.3mm gap between LED and detector
  • Polycarbonate case protected against ambient light
  • Forward current: 50mA
  • Reverse voltage: 6V
  • Power dissipation: 100mW
  • 4-pin package with tab

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  • Specification Value
    ConfigurationPhotointerupter
    Peak Wavelength940 nm
    Gap Width3.3 mm
    Power Dissipation150 mW
    Maximum Collector Emitter Voltage30 V
    Maximum Emitter Collector Voltage4.5 V
    Maximum Collector Current20 mA
    Input Voltage1.7 V
    Maximum Forward Current50 mA
    Maximum Rise Time8 us
    Maximum Fall Time50 us
    MountingTab/.1"PCB
    FamilyH21A3
    Maximum Reverse Voltage6V
    Output DevicePhototransistor
    Minimum Operating Temperature-55°C
    Maximum Operating Temperature100°C
    PackagingRail
    Pins4
    Width6.35 mm
    Height11 mm
    Length24.7 mm


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