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Best Alternatives to RB751V40T1G

Package: SC-76, SOD-323onsemiDiodes - Rectifiers - SinglePackage: Tape & Reel (TR); Cut Tape (CT); Digi-Reel®Voltage - DC Reverse (Vr) (Max): 30 VCurrent - Average Rectified (Io): 30mAVoltage - Forward (Vf) (Max) @ If: 370 mV @ 1 mACurrent - Reverse Leakage @ Vr: 500 nA @ 30 V

The onsemi RB751V40T1G is a 40V, 30mA AEC-Q101 qualified Schottky diode in a SOD-323 package, valued for its very low forward voltage and fast switching, ideal for signal rectification and protection circuits.

AI replacement insight

Electrical riskmedium

Forward voltage (Vf) is a critical parameter for this part; substitutes must be closely matched.

Package risklow

SOD-323 is a common, standardized package, making physical replacement straightforward.

Sourcing risklow

Multiple manufacturers produce similar low-Vf Schottky diodes in this package.

Can it be replaced directly?

Direct replacement for RB751V40T1G should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

The most promising path is cross-vendor alternatives like MSKSEMI's RB751V-40-MS, which closely mirrors the target's key parameters.

Main risk

The primary risk is substituting with a diode that has a higher forward voltage (Vf), which could compromise the performance of sensitive signal or low-loss power applications.

Recommended alternatives

3
RB751V-40-MS package
RB751V-40-MS

MSKSEMI

Needs validationlow risk

A strong cross-vendor alternative with matching package, diode type, and key electrical ratings.

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Alternative comparison matrix

Feature / factorRB751V40T1GRB751V-40-MSS7116-300ARB501V-40Compatibility / risk
PackageSOD-323SOD-323SOD-323SOD-323SOD-323 — Package matches.; S7116-300A: Package matches.; RB501V-40: Package matches.
Diode TypeSchottkySchottky--Schottky — Diode type matches.
Voltage40V40V40V40V40V — Reverse voltage matches.; S7116-300A: Reverse voltage matches.; RB501V-40: Reverse voltage matches.
Current30mA30mA1.0A100mA30mA / 1.0A / 100mA — Forward current matches.; S7116-300A: Higher current rating is acceptable.; RB501V-40: Higher current rating is acceptable.
Forward Voltage0.28V (typ) @ 1mA0.37V @ 1mA0.55V @ 1A0.55V @ 100mA0.37V @ 1mA / 0.55V @ 1A / 0.55V @ 100mA — Forward voltage is very similar (target max is 0.37V).; S7116-300A: Significantly higher forward voltage at a different test current. Review required.; RB501V-40: Significantly higher forward voltage. Review required.

Application & sourcing insights

Questions & answers

Verified drop-in options for RB751V40T1G 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.