RB160M-60
ROHM
Needs validationlow risk
Offers higher voltage (60V) and current (1A) ratings, providing a robust upgrade path.
Best Alternatives to SD103AW S4
Find and compare replacements for the SD103AW S4, a 40V, 350mA Schottky diode in a SOD-123 package. Key considerations for alternatives include voltage/current ratings and forward voltage performance.
AI replacement insight
Electrical riskmedium
Some parts have no voltage margin; others have higher Vf, increasing power loss.
Package risklow
SOD-123 is standard; the SOD-123FL variant is usually footprint-compatible but has a lower profile.
Can it be replaced directly?
Direct replacement for SD103AW S4 should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
Upgrade to a part with higher voltage and current ratings, like RB160M-60, for improved design margin and robustness.
Main risk
The primary risks are insufficient voltage margin with 1:1 replacements and increased power dissipation from higher forward voltage (Vf) in some alternatives.
Recommended alternatives
3Alternative comparison matrix
| Feature / factor | SD103AW S4 | RB160M-60 | K1N5819HW-7-F | MBR0580 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOD-123 | SOD-123 | SOD-123 | SOD-123 | SOD-123 — One data source lists SOD-123FL, a footprint-compatible variant. Verify height clearance.; K1N5819HW-7-F: Package matches target.; MBR0580: Package matches target. |
| Voltage | 40V | 60V | 40V | 80V | 60V / 40V / 80V — Provides increased voltage margin.; K1N5819HW-7-F: Identical rating; no additional safety margin.; MBR0580: Higher voltage rating provides significant margin. |
| Current | 0.35A | 1.0A | 1.0A | 0.5A | 1.0A / 0.5A — Higher current rating offers more robustness.; K1N5819HW-7-F: Higher current rating.; MBR0580: Higher current rating. |
| Vf | 0.6V @ 200mA | 0.58V @ 1A | 0.6V @ 1A | 0.8V @ 500mA | 0.58V @ 1A / 0.6V @ 1A / 0.8V @ 500mA — Vf is specified at a higher current; likely comparable or lower at target's operating current.; K1N5819HW-7-F: Comparable forward voltage characteristic.; MBR0580: Significantly higher forward voltage will increase power dissipation. |
Application & sourcing insights
Questions & answers
Verified drop-in options for SD103AW S4 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.