Needs validationlow risk
A strong pin-to-pin alternative with identical key electrical ratings and package.
Best Alternatives to 1N5819HW-MS
1N5819HW-MS is a common 1A, 40V Schottky diode in a SOD-123 package. Several pin-compatible alternatives and upgrades with higher voltage or current ratings are available from various manufacturers.
AI replacement insight
Electrical riskmedium
Vf and Ir can vary by manufacturer. Always check the specific datasheet.
Package risklow
Most alternatives are SOD-123, but watch for SOD-123FL variants.
Can it be replaced directly?
Direct replacement for 1N5819HW-MS should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
For a direct match, use K1N5819HW-7-F. For a robust upgrade, consider DSS36 for its higher current and voltage ratings.
Main risk
The primary risk is a mismatch in dynamic characteristics like forward voltage or reverse leakage, which can affect circuit efficiency and thermal performance.
Recommended alternatives
4Alternative comparison matrix
| Feature / factor | 1N5819HW-MS | K1N5819HW-7-F | B5819W-G | RB160M-60 | Compatibility / risk |
|---|---|---|---|---|---|
| Diode Type | Schottky | Schottky | - | - | Schottky — Functionally identical type. |
| Package | SOD-123 | SOD-123 | SOD-123 | SOD-123 | SOD-123 / SOD-123 / SOD-123FL — Same package ensures form and fit.; B5819W-G: Same package ensures form and fit.; RB160M-60: Same package ensures form and fit.; DSS36: Some sources use SOD-123FL, which is form-fit compatible but not identical. |
| Voltage | 40V | 40V | 40V | 60V | 40V / 60V — Reverse voltage rating is identical.; B5819W-G: Reverse voltage rating is identical.; RB160M-60: Higher voltage rating provides more design margin.; DSS36: Higher voltage rating provides more design margin. |
| Current | 1A | 1A | 1A | 1A | 1A / 3A — Average rectified current is identical.; B5819W-G: Average rectified current is identical.; RB160M-60: Average rectified current is identical.; DSS36: Higher current rating provides significant thermal margin. |
| Reverse Leakage | 1mA @ 40V | 1mA @ 40V | Not specified in data | 30µA @ 60V | 1mA @ 40V / Not specified in data / 30µA @ 60V — Reverse leakage current is identical.; B5819W-G: Reverse leakage must be verified from datasheet.; RB160M-60: Significantly lower reverse leakage improves efficiency. |
| Forward Voltage | 0.9V @ 3A | - | 0.9V @ 3A | - | 0.9V @ 3A / 0.7V @ 3A — Forward voltage at 3A matches target's key attribute exactly.; DSS36: Lower forward voltage at 3A indicates better performance. |
| Lifecycle | Active | - | - | NRND (ROHM) / Active (Slkor) | NRND (ROHM) / Active (Slkor) — ROHM version is NRND; prefer the Active Slkor version. |
Application & sourcing insights
Questions & answers
Verified drop-in options for 1N5819HW-MS 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.