H21A1 Slotted Optical Sensor OPTO Interrupter Sensor

Product specifications

  • Product type: H21A1 Optical sensor
  • Colour: Black as shown in image
  • Pin counts: 4
  • Package contains: 1 X H21A1 Optical Sensor – Slotted OPTO Interrupter

55.08 ex. GST

H21A1 is an optical sensor consists of gallium arsenide infrared emitting diode, which is coupled with silicon phototransistor in a plastic housing. the sensor design has features like optimizing the mechanical resolution, coupling efficiency, ambient light rejection, cost, and reliability. The housing has a gap, which provides a means of interrupting signal with an opaque material and switches the output from ON to OFF state.


  • Sensing distance: 3mm
  • Sensing method: transmissive
  • Output configurations: phototransistor
  • Maximum emitter collector breakdown voltage: 30V
  • Maximum DC forward current: 50mA
  • Maximum collector current: 20mA
  • Response time: 8-15µ
  • Mounting type: through hole
  • Package type: slotted
SKU: 1295 Category: Tags: ,

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