SS54
MDD
Needs validationlow risk
Potential pin-to-pin match with identical 5A/40V ratings and SMA package. Datasheet review is recommended.
Best Alternatives to SK54A-LTP
SK54A-LTP is a 5A, 40V Schottky rectifier in a common SMA package. Alternatives generally match the current rating and package, with options available at the same or higher voltage ratings.
AI replacement insight
Electrical risklow
Verify forward voltage (Vf) and leakage current (Ir) from datasheets to ensure efficiency and thermal performance are met.
Package risklow
Ensure the replacement uses the same SMA (DO-214AC) package for PCB compatibility.
Sourcing risklow
The SSxx series is widely available from multiple manufacturers, but check current stock and lead times.
Can it be replaced directly?
Direct replacement for SK54A-LTP 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 a part like SS54, which matches the 5A/40V rating. For more design margin, upgrading to a 60V or 80V part like SS56A or SS58 is a common practice.
Main risk
The main risk is ensuring secondary parameters like forward voltage (Vf) and reverse leakage current (Ir) are compatible, as variations can impact circuit efficiency and heat dissipation.
Recommended alternatives
4Alternative comparison matrix
| Feature / factor | SK54A-LTP | SS54 | SS56A | SS58 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SMA (DO-214AC) | SMA (DO-214AC) | SMA (DO-214AC) | SMA (DO-214AC) | SMA (DO-214AC) — Matches target package.; SS56A: Matches target package.; SS58: Matches target package.; SS5200: Matches target package. |
| Voltage | 40.0V | 40.0V | 60.0V | 80.0V | 40.0V / 60.0V / 80.0V / 200.0V — Identical reverse voltage rating.; SS56A: Higher voltage rating provides more design margin.; SS58: Higher voltage rating provides more design margin.; SS5200: Significantly higher voltage rating. |
| Current | 5.0A | 5.0A | 5.0A | 5.0A | 5.0A — Identical forward current rating.; SS56A: Identical forward current rating.; SS58: Identical forward current rating.; SS5200: Identical forward current rating. |
| Forward Voltage | 0.55V | 0.55V @ 5A (from ES) | - | - | 0.55V @ 5A (from ES) / 0.85V (from ES) — Matches target's typical Vf. Verify in datasheet.; SS5200: Higher Vf may reduce efficiency. Critical to verify. |
Application & sourcing insights
Questions & answers
Verified drop-in options for SK54A-LTP 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.