B5819WS
GOODWORK
Needs validationlow risk
Functionally identical alternative with matching package, voltage, current, and Vf/Ir specs.
Best Alternatives to K1N5819HWS-7-F
K1N5819HWS-7-F is a 40V, 1A Schottky rectifier in a compact SOD-323 package, commonly used for rectification and reverse polarity protection. Several pin-compatible alternatives and upgrades with improved performance are available from various manufacturers.
AI replacement insight
Electrical risklow
Low risk if using recommended Schottky alternatives. Vf and Ir are often better.
Package risklow
SOD-323 is a standard package with a consistent footprint.
Can it be replaced directly?
Direct replacement for K1N5819HWS-7-F should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
Upgrade to B16WS for higher voltage margin or MS2A40LWS for double the current handling.
Main risk
The primary risk is substituting with a non-Schottky diode, which would increase switching losses. All recommended alternatives are verified Schottky diodes.
Recommended alternatives
5Alternative comparison matrix
| Feature / factor | K1N5819HWS-7-F | B5819WS | B1040WS | B16WS | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOD-323 | SOD-323 | SOD-323 | SOD-323 | SOD-323 — Same package and pin count.; B1040WS: Same package and pin count.; B16WS: Same package and pin count.; MS2A40LWS: Same package and pin count. |
| Voltage | 40V | 40V | 40V | 60V | 40V / 60V — Reverse voltage matches.; B1040WS: Reverse voltage matches.; B16WS: Higher voltage rating provides more margin.; MS2A40LWS: Reverse voltage matches. |
| Current | 1A | 1A | 1A | 1A | 1A / 2A — Average forward current matches.; B1040WS: Average forward current matches.; B16WS: Average forward current matches.; MS2A40LWS: Higher current rating provides more margin. |
| Vf | 0.90 V @ 3 A | 0.9V @ 3A | 0.58V @ 1A | 0.7V @ 1A | 0.9V @ 3A / 0.58V @ 1A / 0.7V @ 1A / 0.42V @ 1A — Forward voltage characteristic is identical.; B1040WS: Lower forward voltage improves efficiency.; B16WS: Comparable forward voltage.; MS2A40LWS: Lower forward voltage improves efficiency. |
| Ir | 1mA @ 40V | 1mA @ 40V | 50µA @ 40V | - | 1mA @ 40V / 50µA @ 40V / 80µA @ 40V — Reverse leakage is identical.; B1040WS: Significantly lower reverse leakage.; MS2A40LWS: Significantly lower reverse leakage. |
Application & sourcing insights
Questions & answers
Verified drop-in options for K1N5819HWS-7-F 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.