PC817C
GOODWORK
Needs validationmedium risk
PC817C is a close PC817B catalog candidate with matching core ratings.
Best Alternatives to PC817B
PC817B is a 4-pin transistor-output optocoupler family. Alternatives must match package variant, pinout, isolation rating and CTR needs.
AI replacement insight
Electrical riskmedium
CTR range may change output margin.
Package riskmedium
Target has multiple package variants.
Firmware risklow
No firmware interface.
Sourcing riskmedium
External Sharp item is not indexed.
Can it be replaced directly?
Direct replacement for PC817B should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
Start with PC817C for same-maker review, then K10101B if CTR range is acceptable.
Main risk
Pinout and CTR bin are not fully verified.
Recommended alternatives
2Alternative comparison matrix
| Feature / factor | PC817B | PC817C | K10101B | BPC-817SB | Compatibility / risk |
|---|---|---|---|---|---|
| Package | DIP4/DIP4-M/SMD4 | DIP-4 | DIP-4 | SMD | DIP-4 / SMD — DIP only; K10101B: DIP only; BPC-817SB: footprint unclear |
| Pinout | 4 pins | 4 pins | 4 pins | 4 pins | 4 pins — functions unverified; K10101B: functions unverified; BPC-817SB: functions unverified |
| Voltage | 5kVrms,80V | 5kVrms,80V | 5kVrms,80V | 5kVrms,80V | 5kVrms,80V — ratings match; K10101B: ratings match; BPC-817SB: ratings match |
| Current | IF/IC 50mA | IF/IC 50mA | 50mA; CTR 130-260% | 50mA; CTR 130-260% | IF/IC 50mA / 50mA; CTR 130-260% — CTR 200-400%; K10101B: narrower CTR; BPC-817SB: narrower CTR |
| Temperature | -55..110C | -55..110C | -55..115C | -30..110C | -55..110C / -55..115C / -30..110C — same range; K10101B: top margin; BPC-817SB: low temp loss |
Application & sourcing insights
Questions & answers
Verified drop-in options for PC817B are limited in the current batch. Review candidates marked Strong match or Datasheet verified, and validate package, pinout, and electrical limits before committing a BOM change.