PC817X Series contains an IRED optically coupled
to a phototransistor.
It is packaged in a 4pin DIP, available in wide-lead
spacing option and SMT gullwing lead-form option.
Input-output isolation voltage(rms) is 5.0kV.
Collector-emitter voltage is 80V(*) and CTR is 50%
to 600% at input current of 5mA.

1. I/O isolation for MCUs (Micro Controller Units)
2. Noise suppression in switching circuits
3. Signal transmission between circuits of different potentials
and impedances.