H22A1, H22A2, H22A3

Phototransistor Optical Interrupter Switch

Product type IC(ON) (mA) min Test Conditions Output Aperture Width (mm)
H22A1 1.0 If=20mA, VCE = 5V Phototransistor 0.94
H22A2 2.0 If=20mA, VCE = 5V Phototransistor 0.94
H22A3 4.0 If=20mA, VCE = 5V Phototransistor 0.94


  • No Contact Sensing
  • 1mm Aperture
  • High IC(ON)
  • PCB mount
  • Transistor output
  • RoHS compliant


The H22AX products consist of a infrared light emitting diode coupled to an NPN silicon phototransistor packaged in a injection molded housing. The package is designed to optimize the mechanical resolution, coupling efficiency, ambient light rejection, and reliability. Inserting/removing an opaque material into the gap when the LED is operating, switches the transistor on/off.

Download the datasheet

Package Dimensions

H22A1, H22A2, H22A3 package dimensions schematic
  1. Dimensions for all drawings are in millimeters.
  2. Tolerance of +/- 0.25 on all non nominal dimensions unless otherwise specified