ProjectsPricingInsights

Best Alternatives to MB1S

Package: TO-269AA, 4-BESOPonsemiDiodes - Bridge RectifiersPackage: Tape & Reel (TR); Cut Tape (CT); Digi-Reel®Technology: StandardVoltage - Peak Reverse (Max): 100 VCurrent - Average Rectified (Io): 500 mAVoltage - Forward (Vf) (Max) @ If: 1 V @ 500 mA

The onsemi MB1S is a 0.5A, 100V bridge rectifier in a compact SOIC4 W package. While no direct drop-in replacements have been identified, several functional alternatives with similar or superior electrical ratings are available in different packages.

AI replacement insight

Package riskhigh

No candidates match the SOIC4 W package, requiring a mandatory PCB redesign.

Electrical risklow

All candidates offer equal or superior voltage and current ratings.

Can it be replaced directly?

No, there are no direct pin-for-pin replacements for the MB1S in a SOIC4 W package among the reviewed candidates. All alternatives require a board redesign.

Best replacement path

Using a functional alternative with superior voltage/current ratings, such as MB10S or DF06S, but this will require a PCB layout change to accommodate the different package.

Main risk

The primary risk is the package mismatch. All potential substitutes have different physical footprints (e.g., MBS, MBF, DBS) compared to the target's SOIC4 W package.

Recommended alternatives

5
MB10S package
MB10S

TWGMC

Needs validationhigh risk

Functional alternative with higher voltage (1000V) and current (0.8A), but in a different package.

View details

Alternative comparison matrix

Feature / factorMB1SDF06SMB10SMB110SCompatibility / risk
PackageSOIC4 W4-SDIP / DBSMBSMBS4-SDIP / DBS / MBS — Requires PCB redesign.; MB10S: Requires PCB redesign.; MB110S: Requires PCB redesign.; MB310S: Requires PCB redesign.
Current0.5A1.5A0.8A1.0A1.5A / 0.8A / 1.0A / 3.0A — Candidate has higher current rating.; MB10S: Candidate has higher current rating.; MB110S: Candidate has higher current rating.; MB310S: Candidate has higher current rating.
Voltage100V600V1000V100V600V / 1000V / 100V — Candidate has much higher voltage rating.; MB10S: Candidate has much higher voltage rating.; MB110S: matched; MB310S: matched

Application & sourcing insights

Questions & answers

Electrically, parts like MB10S or DF06S are strong alternatives with higher voltage and current ratings. However, they are in different packages (e.g., MBS, DBS) and require a PCB redesign.