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Best Alternatives to MBRS240LT3G

Package: DO-214AA, SMBonsemiDiodes - Rectifiers - SinglePackage: Tape & Reel (TR); Cut Tape (CT); Digi-Reel®Voltage - DC Reverse (Vr) (Max): 40 VCurrent - Average Rectified (Io): 2AVoltage - Forward (Vf) (Max) @ If: 430 mV @ 2 ACurrent - Reverse Leakage @ Vr: 2 mA @ 40 V

MBRS240LT3G is a common 40V, 2A Schottky rectifier in an SMB package. Several pin-compatible alternatives are available, offering trade-offs in efficiency, voltage margin, and current handling for various applications.

AI replacement insight

Package risklow

All top candidates use the same SMB package, ensuring physical compatibility.

Electrical riskmedium

Key risks are forward voltage (Vf) differences affecting efficiency, and some parts matching the 40V rating without margin.

Sourcing risklow

Candidates are from major manufacturers like STMicroelectronics and onsemi, ensuring good availability.

Can it be replaced directly?

Direct replacement for MBRS240LT3G should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

For an efficiency upgrade, STPS2L40U is the best path due to its much lower forward voltage. For a more robust, higher-voltage option, SS26T3G is a strong choice.

Main risk

The main risk when substituting is mismatch in forward voltage (Vf), which directly impacts power loss and thermal performance. Some alternatives also lack voltage safety margin.

Recommended alternatives

5
STPS2L40U package
STPS2L40U

STMicroelectronics

Needs validationlow risk

An excellent pin-compatible option offering significantly lower forward voltage for better efficiency.

View details

Alternative comparison matrix

Feature / factorMBRS240LT3GSTPS2L40USTPS340USS26T3GCompatibility / risk
PackageSMB (DO-214AA)SMBSMBSMB (DO-214AA)SMB / SMB (DO-214AA) — Package is form-fit compatible.; STPS340U: Package is form-fit compatible.; SS26T3G: Package is form-fit compatible.; STPS2H100U: Package is form-fit compatible.
Voltage40V40V40V60V40V / 60V / 100V — Identical voltage rating; no additional safety margin.; STPS340U: Identical voltage rating; no additional safety margin.; SS26T3G: Higher voltage rating provides more safety margin.; STPS2H100U: Higher voltage rating provides significant safety margin.
Current2A2A3A2A2A / 3A — Current rating is identical.; STPS340U: Higher current rating provides more margin.; SS26T3G: Current rating is identical.; STPS2H100U: Current rating is identical.
Vf~0.5V @ 2A0.34V @ 2A~0.5V @ 2A0.63V @ 2A0.34V @ 2A / ~0.5V @ 2A / 0.63V @ 2A / 0.65V @ 2A — Significantly lower forward voltage improves efficiency.; STPS340U: Forward voltage is comparable to target.; SS26T3G: Higher forward voltage increases power loss.; STPS2H100U: Higher forward voltage increases power loss.
Temperatureto 125°Cto 150°Cto 150°C-55°C to 150°Cto 150°C / -55°C to 150°C / to 175°C — Higher maximum operating temperature.; STPS340U: Higher maximum operating temperature.; SS26T3G: Wider operating temperature range.; STPS2H100U: Higher maximum operating temperature.

Application & sourcing insights

Questions & answers

Verified drop-in options for MBRS240LT3G 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.