B0530WS SE
Jiangsu Changjing Electronics Technology Co., Ltd.
Needs validationmedium risk
A strong pin-compatible alternative with higher voltage rating and lower forward voltage.
Best Alternatives to LRB551V-30T1G
Finding a replacement for the LRB551V-30T1G, a 20V 0.5A Schottky diode in a SOD-323 package, involves matching key electrical ratings and physical footprint. Several pin-compatible alternatives with upgraded voltage and current ratings are available.
AI replacement insight
Electrical risklow
Most candidates meet or exceed key ratings. Check Vf for efficiency-sensitive applications.
Package risklow
All reviewed candidates use the same SOD-323 package, ensuring physical compatibility.
Can it be replaced directly?
Direct replacement for LRB551V-30T1G should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
B1040WS offers a clear upgrade path with higher voltage (40V) and current (1A) ratings. B0530WS SE is a strong pin-for-pin match with a voltage upgrade and better forward voltage.
Main risk
The primary risk is selecting a part with a higher forward voltage (Vf), which could reduce circuit efficiency and increase heat.
Recommended alternatives
6Alternative comparison matrix
| Feature / factor | LRB551V-30T1G | B0530WS SE | B1040WS | RB550V-30 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOD-323 | SOD-323 | SOD-323 | SOD-323 | SOD-323 — Package matches, ensuring physical compatibility.; B1040WS: Package matches, ensuring physical compatibility.; RB550V-30: Package matches, ensuring physical compatibility.; B5817WS-MS: Package matches, ensuring physical compatibility. |
| Voltage | 20V | 30V | 40V | 30V | 30V / 40V / 20V — Higher reverse voltage provides more design margin.; B1040WS: Higher reverse voltage provides more design margin.; RB550V-30: Higher reverse voltage provides more design margin.; B5817WS-MS: Voltage rating matches target with no extra margin. |
| Current | 0.5A | 0.5A | 1.0A | 1.0A | 0.5A / 1.0A — Forward current rating matches the target.; B1040WS: Higher forward current rating.; RB550V-30: Higher forward current rating.; B5817WS-MS: Higher forward current rating. |
| Forward Voltage | 0.54V @ 0.5A | 0.45V @ 0.5A | - | 0.56V @ 1A | 0.45V @ 0.5A / 0.56V @ 1A / 0.45V @ 1A — Lower forward voltage improves efficiency.; RB550V-30: Forward voltage is comparable; likely similar to target at 0.5A.; B5817WS-MS: Lower forward voltage improves efficiency. |
| Reverse Leakage | 100µA @ 20V | - | 50µA @ 20V | - | 50µA @ 20V — Lower reverse leakage current improves performance. |
Application & sourcing insights
Questions & answers
Verified drop-in options for LRB551V-30T1G 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.