CYPC817(B-TP2)
OCIC
Needs validationlow risk
A likely pin-compatible alternative from the PC817 family with matching key electricals and a wider temperature range.
Best Alternatives to PC817X4CSP9F
PC817X4CSP9F is a widely used 4-pin phototransistor optocoupler from SHARP, offering 5000Vrms isolation. It is suitable for power supply feedback loops, system control, and signal isolation.
AI replacement insight
Package riskmedium
Target's '4-Pin' package is ambiguous; footprint verification is critical.
Electrical risklow
Key parameters are standard, but CTR binning must be checked for the specific application.
Sourcing risklow
The PC817 family is a multi-source, high-volume commodity part.
Can it be replaced directly?
Direct replacement for PC817X4CSP9F should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
Cross-vendor PC817 family parts like OCIC's CYPC817(B-TP2) offer the highest chance of a drop-in replacement.
Main risk
The primary risk is physical incompatibility, as '4-Pin' can refer to multiple footprints (DIP, SOP). Electrical risks include mismatched CTR bins.
Recommended alternatives
4Alternative comparison matrix
| Feature / factor | PC817X4CSP9F | CYPC817(B-TP2) | TLP385(D4GR-TL,E | TLP383(GR-TPL,E | Compatibility / risk |
|---|---|---|---|---|---|
| Package | 4-Pin | 4-pin | 4-pin SO6L | 4-pin SO6L | 4-pin / 4-pin SO6L — Likely compatible DIP/SOP, but requires footprint verification.; TLP385(D4GR-TL,E: Different package requires board redesign.; TLP383(GR-TPL,E: Different package requires board redesign.; TLP385(GR-TPL,E: Different package requires board redesign. |
| Voltage | 5000 Vrms | 5000 Vrms | 5000 Vrms | 5000 Vrms | 5000 Vrms — Isolation voltage matches.; TLP385(D4GR-TL,E: Isolation voltage matches.; TLP383(GR-TPL,E: Isolation voltage matches.; TLP385(GR-TPL,E: Isolation voltage matches. |
| Temperature | -30°C to +100°C | -55°C to +110°C | -55°C to 110°C | -55°C to 125°C | -55°C to +110°C / -55°C to 110°C / -55°C to 125°C / -55 to 110 °C — Wider operating range.; TLP385(D4GR-TL,E: Wider operating range.; TLP383(GR-TPL,E: Wider operating range.; TLP385(GR-TPL,E: Wider operating range. |
| Ctr | 50% to 600% | 130-260% (Rank B) | 50% to 600% | 100-300% (GB Rank) | 130-260% (Rank B) / 50% to 600% / 100-300% (GB Rank) / 50% min — Tighter CTR bin, falls within target's range.; TLP385(D4GR-TL,E: CTR range matches target.; TLP383(GR-TPL,E: Tighter CTR bin, falls within target's range.; TLP385(GR-TPL,E: Compatible CTR range, though less constrained. |
Application & sourcing insights
Questions & answers
Verified drop-in options for PC817X4CSP9F 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.