LTV-817S-TA1-D
LITEON
Needs validationmedium risk
A variant from the same LTV-817 series with a much higher CTR (Rank D). Package and voltages match.
Best Alternatives to LTV-817S-TA1-B
Find functional alternatives for the LITEON LTV-817S-TA1-B optocoupler. This guide reviews compatible parts, highlighting key differences in Current Transfer Ratio (CTR) and voltage ratings to ensure a successful replacement.
AI replacement insight
Electrical riskmedium
CTR mismatch requires circuit analysis or testing. Some candidates offer higher VCEO, which is a low-risk improvement.
Package risklow
All candidates use a compatible 4-pin SMD package. Pinouts for this type of part are highly standardized.
Sourcing risklow
Multiple vendors produce similar '817' type optocouplers, indicating good supply chain depth for the function.
Can it be replaced directly?
There is no direct, drop-in replacement with the identical CTR Rank B (130-260%) among the candidates. However, several functional alternatives with matching packages and different CTR bins are available.
Best replacement path
The best path is to use another part from the LITEON LTV-817S series, such as LTV-817S-TA1-C, and verify if the different CTR is acceptable for the application.
Main risk
The primary risk is the change in Current Transfer Ratio (CTR), which can alter the gain of the isolated feedback loop or signal path, potentially causing instability or incorrect operation.
Recommended alternatives
4Alternative comparison matrix
| Feature / factor | LTV-817S-TA1-B | LTV-817S-TA1-D | LTV-817S-TA1-C | LTV-816S-TA1-C | Compatibility / risk |
|---|---|---|---|---|---|
| Package | 4-pin SMD | 4-pin SMD | - | - | 4-pin SMD — Package matches. |
| Ctr | 130-260% (Rank B) | 300-600% (Rank D) | - | - | 200-400% (Rank C) — Higher CTR. May affect circuit gain and stability. Requires review. |
| Vceo | 35 V | 35 V | - | - | 80 V — Higher VCEO provides more voltage margin. |
| Isolation Voltage | 5000 Vrms | 5000 Vrms | - | - | 5000 Vrms — Isolation voltage matches. |
| Pin Count | 4 | - | 4 | - | 4 — Pin count matches. |
| Temperature | -30 to +110 °C | - | - | -50°C to +110°C | — |
| If | 50 mA | - | - | - | — |
Application & sourcing insights
Questions & answers
The best alternative is likely another part from the same LITEON LTV-817S series, such as LTV-817S-TA1-C. It shares the same package and voltage ratings, but has a different CTR (200-400%) that must be verified for your circuit.