MBR120LSF
SHIKUES
Needs validationmedium risk
MBR120LSF is a close SOD-123 Schottky candidate for B5817W with higher Vf.
Best Alternatives to B5817W
B5817W is a 20 V, 1 A SOD-123 Schottky diode. Alternatives need pinout, Vf, and thermal checks before use.
AI replacement insight
Electrical riskmedium
Vf differs on close candidates.
Package riskmedium
Pin orientation is not checked.
Firmware risklow
No firmware interface.
Sourcing riskmedium
Some records conflict or are obsolete.
Can it be replaced directly?
Direct replacement for B5817W should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
Start with MBR120LSF, then verify pin orientation and higher forward voltage.
Main risk
Higher Vf can increase loss and heat; pinout is not verified.
Recommended alternatives
2Alternative comparison matrix
| Feature / factor | B5817W | MBR120LSF | LMBR140T1G | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOD-123 | SOD-123 | - | SOD-123 — same case | |
| Pinout | 2-pin diode | 2-pin diode | - | 2-pin diode — orientation not checked | |
| Voltage | 20 V | 20 V | - | 40 V — higher Vr | |
| Current | 1 A | 1 A | - | 1 A — same Io | |
| Application | Vf 0.45 V | Vf 0.6 V | - | Vf 0.6 V — more loss | |
| Temperature | -55 to 150 C | - | -40 to 150 C | -40 to 150 C — cold limit |
Application & sourcing insights
Questions & answers
Verified drop-in options for B5817W 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.