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Quoting product code: JA26D


About this product


  • Photo emitting diode and phototransistor housed in a compact package
  • Used for counting, rotational speed and more
  • One millisecond rise/fall time

Product overview

A photo emitting diode and a phototransistor housed in a compact package that can be used for counting, rotational speed etc. The device has a very fast rise/fall time - just 1ms.


Specification (IF=20mA, ICE=1mA, VCE=5V)
Photocurrent (R<->L=20k): 230µa min.
Saturation (R<->L=20k): 0.4V
Cross talk: 1.0µA
Dark current (I<->F=0mA): 100nA
V<->F: 1.7V
V<->ECO (I<->CE=1mA): -3V
V<->CEO (I<->CE=1mA): 12V
Rise time: 1ms
Fall time: 1ms

At 5v supply, what value of load resistor RL is required? Can I use a 3.3v supply? If so, what value load resistor would be required?

Asked by: Tonygwr
Sorry but we are unable to advise on individual project or circuit designs. The technical characteristics for the device can be found here. Ff building or designing your own project or circuit then this information should enable you to select the correct components and values.
Answered by: Les
Date published: 2017-05-17

What's the maximum distance for a reflective surface to be set at.
Asked by: Keith
Approx 5mm
Answered by: JK
Date published: 2015-07-17

Do you have a shaft encoder (for motor shaft) for these type devices
Asked by: brian
Regretably not
Answered by: PS
Date published: 2015-07-17
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