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Best Alternatives to US1ML

Package: SOD-123FLShandong Diyi Electronic Science and Technology Co., Ltd.Diodes - Rectifiers - SingleMaximum repetitive reverse voltage: 1000 VMaximum DC blocking voltage: 1000 VAverage forward rectified current: 1.0 A at TL = 100 °CPeak forward surge current: 30 A, 8.3 ms single half-sine waveForward voltage: 1.7 V max at IF = 1.0 A

Find alternatives for the US1ML, a 1A, 1000V ultrafast rectifier in a SOD-123FL package. Key parameters for replacement are its 75ns reverse recovery time (trr), package, and electrical ratings.

AI replacement insight

Electrical riskhigh

Using a standard or fast recovery diode instead of an ultrafast one will likely cause overheating and failure in fast-switching applications.

Package risklow

Many alternatives exist in the same SOD-123FL package, making physical replacement straightforward.

Can it be replaced directly?

Direct replacement for US1ML should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

U1M for a direct match, or US2MW for an upgrade with higher current handling.

Main risk

The primary risk is substituting with a diode that has a slower reverse recovery time (trr), which can cause circuit failure.

Recommended alternatives

3
U1M package
U1M

FUXINSEMI

Needs validationlow risk

A 1000V, 1A ultrafast diode with nearly identical parameters in the same package.

View details

Alternative comparison matrix

Feature / factorUS1MLU1MUS2MWFR107WCompatibility / risk
PackageSOD-123FLSOD-123FLSOD-123FLSOD-123FLSOD-123FL — Package matches, likely pin compatible.; US2MW: Package matches, likely pin compatible.; FR107W: Package matches.
Voltage1000V1000V1000V-1000V — Reverse voltage rating matches.; US2MW: Reverse voltage rating matches.
Current1A1A2A-1A / 2A — Forward current rating matches.; US2MW: Higher current rating provides more margin.
Trr75ns75ns75ns500ns75ns / 500ns — Ultrafast recovery time matches target.; US2MW: Ultrafast recovery time matches target.; FR107W: Significantly slower recovery time.
Vf1.7V @ 1A1.7V @ 1A--1.7V @ 1A — Forward voltage matches.
Voltage Current1A / 1000V--1A / 1000V1A / 1000V — Ratings match.

Application & sourcing insights

Questions & answers

Verified drop-in options for US1ML 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.