LTV-816S-TA1-C
LITEON
Needs validationlow risk
Strong alternative with matching package, VCEO, and CTR. Offers a wider operating temperature range.
Best Alternatives to PC817X3CSP9F
PC817X3CSP9F is a popular 4-SMD phototransistor optocoupler from SHARP with 5000Vrms isolation. When seeking alternatives, it's crucial to match the package, VCEO of 80V, and the specific 'Rank C' Current Transfer Ratio (CTR).
AI replacement insight
Electrical riskmedium
CTR and VCEO must be carefully matched to avoid performance issues or failure.
Package risklow
Many alternatives exist in the same 4-SMD package, but through-hole (DIP) versions are not compatible.
Sourcing risklow
The PC817/LTV-816 family is widely available from multiple manufacturers.
Can it be replaced directly?
Direct replacement for PC817X3CSP9F should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
The most promising replacement path is LITEON's LTV-816S-TA1-C, which aligns on package, VCEO, and CTR. Other options exist but may require design changes or introduce performance downgrades.
Main risk
The main risk is selecting a substitute with a lower Collector-Emitter Voltage (VCEO) or an incompatible Current Transfer Ratio (CTR) bin, which can lead to component failure or unpredictable circuit behavior.
Recommended alternatives
4Alternative comparison matrix
| Feature / factor | PC817X3CSP9F | LTV-816S-TA1-C | LTV-817S-TA1-C | LTV-817S-TA1-B | Compatibility / risk |
|---|---|---|---|---|---|
| Package | 4-SMD | 4-pin SMD | - | - | 4-SMD, Gull Wing — Package is similar but may have a different footprint. |
| Voltage | 80 V | 80 V | - | - | 80 V — VCEO matches. |
| Ctr | 200-400% (est.) | 200-400% | - | - | 130-260% — Rank B CTR is different from target's Rank C. |
| Temperature | -30°C to +100°C | -50°C to +110°C | - | - | -50°C to +110°C — Wider operating temperature range. |
Application & sourcing insights
Questions & answers
Verified drop-in options for PC817X3CSP9F 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.