ORPC-817SC-TP-C
Orient
Needs validationlow risk
Strong alternative with matching CTR and isolation, plus higher voltage and wider temperature range.
Best Alternatives to PC817C-S
PC817C-S is a popular SOP-4 optocoupler with 5000Vrms isolation. Several alternatives exist, with ORPC-817SC-TP-C from Orient being a strong candidate with matching or improved specifications.
AI replacement insight
Electrical risklow
Low for ORPC-817SC-TP-C; medium for others due to lower isolation voltage.
Package risklow
All reviewed candidates are in the same SOP-4 package.
Sourcing riskmedium
Availability and lead times for alternatives should be verified with distributors.
Can it be replaced directly?
Direct replacement for PC817C-S should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
The most direct path is to use another 817C series optocoupler in an SOP-4 package, like Orient's ORPC-817SC-TP-C, which matches critical parameters.
Main risk
The main risk when substituting is selecting a part with a lower isolation voltage (e.g., 3750Vrms vs 5000Vrms), which can compromise safety standards.
Recommended alternatives
3Alternative comparison matrix
| Feature / factor | PC817C-S | ORPC-817SC-TP-C | OR-357C-S-TP-G | OR-3H7C-TP-G | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOP-4 | SOP-4 | SOP-4 | SOP-4 | SOP-4 — Form factor matches.; OR-357C-S-TP-G: Form factor matches.; OR-3H7C-TP-G: Form factor matches. |
| Isolation Voltage | 5000 Vrms | 5000 Vrms | 3750 Vrms | 3750 Vrms | 5000 Vrms / 3750 Vrms — Safety-critical voltage matches.; OR-357C-S-TP-G: Lower isolation voltage requires review.; OR-3H7C-TP-G: Lower isolation voltage requires review. |
| Collector-Emitter Voltage (Vceo) | 35 V | 80 V | 80 V | 80 V | 80 V — Higher voltage rating provides more margin.; OR-357C-S-TP-G: Higher voltage rating.; OR-3H7C-TP-G: Higher voltage rating. |
| Current Transfer Ratio (Ctr) | 200% - 400% | 200% - 400% | 200-400% | 200-400% | 200% - 400% / 200-400% — CTR grade matches, ensuring similar gain.; OR-357C-S-TP-G: CTR grade matches.; OR-3H7C-TP-G: CTR grade matches. |
| Operating Temperature | -30°C to 100°C | -55°C to +110°C | -55°C to 125°C | - | -55°C to +110°C / -55°C to 125°C — Wider operating range.; OR-357C-S-TP-G: Wider operating range. |
Application & sourcing insights
Questions & answers
Verified drop-in options for PC817C-S 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.