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Best Alternatives to RB520S30T1G

Package: SC-79, SOD-523onsemiDiodes - Rectifiers - SingleSeries: -Package: Tape & Reel (TR); Cut Tape (CT); Digi-Reel®Voltage - DC Reverse (Vr) (Max): 30 VCurrent - Average Rectified (Io): 200mAVoltage - Forward (Vf) (Max) @ If: 600 mV @ 200 mA

RB520S30T1G replacements should be limited to SOD-523 Schottky diodes with equal or higher stress ratings. Pin orientation and leakage remain key review items.

AI replacement insight

Electrical riskmedium

Leakage and VF vary.

Package risklow

Most are SOD-523.

Firmware risklow

Discrete diode.

Sourcing riskmedium

Some MPNs map to multiple vendors.

Can it be replaced directly?

Direct replacement for RB520S30T1G should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

Start with 40V SOD-523 Schottky candidates, then verify pinout and leakage.

Main risk

Unverified cathode orientation and reverse leakage.

Recommended alternatives

6
LRB521S-40T1G package
LRB521S-40T1G

LRC

Needs validationmedium risk

40V SOD-523 Schottky candidate for RB520S30T1G with pinout review needed.

View details

Alternative comparison matrix

Feature / factorRB520S30T1GLRB521S-40T1G1N5819WTB5819WTCompatibility / risk
PackageSOD-523SOD-523SOD-523SOD-523SOD-523 — same case; 1N5819WT: same case; B5819WT: same case; RB521S-30: same case
Pinout2-pin diode2-pin diode2-pin diode2-pin diode2-pin diode — orientation not shown; 1N5819WT: orientation not shown; B5819WT: orientation not shown; RB521S-30: orientation not shown
Voltage30V40V40V40V40V / 30V — rating higher; 1N5819WT: rating higher; B5819WT: rating higher; RB521S-30: no extra margin
Current200mA200mA350mA350mA200mA / 350mA — same current; 1N5819WT: rating higher; B5819WT: rating higher; RB521S-30: same current
Temperature-55..150C-50..150C---50..150C — cold limit weaker
ApplicationSchottky-SchottkySchottkySchottky — same role; B5819WT: same role; RB521S-30: from summary

Application & sourcing insights

Questions & answers

Verified drop-in options for RB520S30T1G 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.