According to PC817 datasheet it 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.
PC817 features
- 4 pin DIP package
- Double transfer mold package (Ideal for Flow Soldering)
- High collector-emitter voltage (VCEO:80V)
- Current transfer ratio (CTR : MIN. 50% at IF=5 mA, VCE=5V)
- Several CTR ranks available
- High isolation voltage between input and output (Viso(rms) : 5.0 kV)
- Lead-free and RoHS directive compliant
PC817 applications
- I/O isolation for MCUs (Micro Controller Units)
- Noise suppression in switching circuits
- Signal transmission between circuits of different potentials and impedances
