PC817 Photocopier Opto Isolator is 4 pins general-purpose optocoupler of generally used as an isolator between high voltage to low voltage;

Description Of PC817;

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

Applications.

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