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Best Alternatives to MBRS140T3G

Package: DO-214AA, SMBonsemiDiodes - Rectifiers - SinglePackage: Tape & Reel (TR); Cut Tape (CT); Digi-Reel®Voltage - DC Reverse (Vr) (Max): 40 VCurrent - Average Rectified (Io): 1AVoltage - Forward (Vf) (Max) @ If: 600 mV @ 1 ACurrent - Reverse Leakage @ Vr: 1 mA @ 40 V

MBRS140T3G is a 40V, 1A Schottky rectifier in an SMB package. Suitable alternatives generally offer higher voltage and current ratings in the same package, but require verification of forward voltage (Vf) to ensure efficiency.

AI replacement insight

Electrical riskhigh

Using a non-Schottky or high-Vf diode will cause high power loss or circuit failure.

Package risklow

SMB (DO-214AA) is a standard package with many compatible options.

Can it be replaced directly?

While no exact drop-in is listed, parts like UMW SS26B are strong functional upgrades in the same SMB package. They offer higher ratings but require checking the datasheet for forward voltage to ensure it meets your application's efficiency needs.

Best replacement path

Use an upgrade path candidate like UMW SS26B or SS36B, which offer higher voltage/current ratings with a comparable forward voltage.

Main risk

The primary risk is selecting a replacement with a higher forward voltage (Vf), which increases power loss and heat generation.

Recommended alternatives

3
UMW SS26B package
UMW SS26B

UMW

Needs validationlow risk

An excellent upgrade with higher voltage/current ratings and comparable forward voltage in the same package.

View details

Alternative comparison matrix

Feature / factorMBRS140T3GUMW SS26BUMW SS36BUMW SS510BCompatibility / risk
PackageSMB (DO-214AA)SMBSMB (DO-214AA)SMBSMB / SMB (DO-214AA) — Form-fit compatible.; UMW SS36B: Form-fit compatible.; UMW SS510B: Form-fit compatible.
Voltage40V60V60V100V60V / 100V — Higher voltage rating provides more margin.; UMW SS36B: Higher voltage rating provides more margin.; UMW SS510B: Higher voltage rating provides more margin.
Current1.0A2.0A3.0A5.0A2.0A / 3.0A / 5.0A — Higher current rating.; UMW SS36B: Higher current rating.; UMW SS510B: Higher current rating.
Forward Voltage0.55V @ 1A~0.58V @ 1A~0.58V @ 1A~0.65V @ 1A~0.58V @ 1A / ~0.65V @ 1A — Comparable Vf ensures similar efficiency. Value estimated from datasheet graph.; UMW SS36B: Comparable Vf ensures similar efficiency. Value estimated from datasheet graph.; UMW SS510B: Higher Vf increases power loss. Value estimated from datasheet graph.
Temperature-65°C to +125°C-65°C to 150°C-65°C to 150°C-50°C to +150°C-65°C to 150°C / -50°C to +150°C — Wider operating range.; UMW SS36B: Wider operating range.; UMW SS510B: Slightly narrower low-end range.

Application & sourcing insights

Questions & answers

UMW SS26B and SS36B are excellent alternatives, offering higher voltage and current ratings in the same SMB package with a comparable forward voltage.