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

    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.

Specification:

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: 8-15�

Mounting type: through hole

Package type: slotted