CUS10S30
Toshiba Semiconductor and Storage
Needs validationlow risk
Pin-compatible upgrade with double the current rating and lower forward voltage for better efficiency.
Best Alternatives to B0530WS
B0530WS is a 30V, 0.5A Schottky diode in a compact SOD-323 package, used for rectification and protection. Alternatives should match the package and meet or exceed these electrical ratings.
AI replacement insight
Electrical riskmedium
Forward voltage (Vf) varies between candidates, impacting efficiency and thermals. Some lack voltage safety margin.
Package risklow
SOD-323 is a standard package with many pin-compatible options available.
Sourcing risklow
This is a common diode type with multiple manufacturers and high availability.
Can it be replaced directly?
Direct replacement for B0530WS should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
CUS10S30 is a strong upgrade path due to higher current and lower forward voltage in the same package.
Main risk
The main risk is increased power loss and heat if a replacement has a higher forward voltage (Vf).
Recommended alternatives
4Alternative comparison matrix
| Feature / factor | B0530WS | CUS10S30 | RB551V-40 | B5819WS | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOD-323 | SOD-323 | SOD-323 | SOD-323 | SOD-323 — Package matches, enabling drop-in.; RB551V-40: Package matches, enabling drop-in.; B5819WS: Package matches, enabling drop-in.; B0540WS: Package matches, enabling drop-in. |
| Voltage | 30V | 30V | 40V | 40V | 30V / 40V — Voltage matches but offers no extra margin.; RB551V-40: Higher voltage rating provides more design margin.; B5819WS: Higher voltage rating provides more design margin.; B0540WS: Higher voltage rating provides more design margin. |
| Current | 0.5A | 1.0A | 0.5A | 1.0A | 1.0A / 0.5A — Higher current rating provides more capability.; RB551V-40: Current rating is identical.; B5819WS: Higher current rating provides more capability.; B0540WS: Current rating is identical. |
| Forward Voltage | 0.43V @ 0.5A | ~0.35V @ 0.5A | 0.47V @ 0.5A | >0.5V @ 0.5A | ~0.35V @ 0.5A / 0.47V @ 0.5A / >0.5V @ 0.5A / 0.55V @ 0.5A — Lower Vf improves efficiency.; RB551V-40: Slightly higher Vf may increase power loss.; B5819WS: Higher Vf will increase power loss.; B0540WS: Significantly higher Vf will increase power loss. |
Application & sourcing insights
Questions & answers
Verified drop-in options for B0530WS 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.