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Best Alternatives to DFR1M

Package: SOD-123FLSQFMIDiodes - Rectifiers - SingleDevice type: Fast recovery rectifierPeak repetitive reverse voltage: 1000 VRMS reverse voltage: 700 VAverage rectified output current: 1.0 ANon-repetitive peak forward surge current: 30 A

Finding a replacement for the DFR1M fast recovery diode involves matching its 1000V, 1A, 500ns specs in a SOD-123FL package. Several alternatives exist, with FR107W being a strong pin-compatible match.

AI replacement insight

Electrical riskmedium

Some alternatives have higher forward voltage (Vf), increasing heat. General-purpose diodes must be avoided due to slow recovery time.

Package risklow

All viable candidates use the same SOD-123FL package.

Sourcing risklow

Multiple manufacturers produce suitable fast recovery diodes in this package.

Can it be replaced directly?

Direct replacement for DFR1M should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

FR107W is the best replacement path, offering identical key parameters and package.

Main risk

The main risk when substituting is selecting a diode with a higher forward voltage (Vf), which increases power loss, or a much slower recovery time (trr), which is unsuitable for fast-switching applications.

Recommended alternatives

4
FR107W package
FR107W

FUXINSEMI

Needs validationlow risk

Offers identical key electrical parameters (1000V, 1A, 500ns trr) and package, making it a strong candidate for direct replacement.

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Alternative comparison matrix

Feature / factorDFR1MFR107WUS2MWU1MCompatibility / risk
PackageSOD-123FLSOD-123FLSOD-123FLSOD-123FLSOD-123FL — Package matches target.; US2MW: Package matches target.; U1M: Package matches target.; US1ML: Package matches target.
Voltage1000V1000V--1000V — Reverse voltage matches.
Current1A1A2A1A1A / 2A — Forward current matches.; US2MW: Higher current rating provides more margin.; U1M: Forward current matches.; US1ML: Forward current matches.
Trr500ns500ns75ns75ns500ns / 75ns — Reverse recovery time matches.; US2MW: Significantly faster recovery time (ultrafast).; U1M: Significantly faster recovery time (ultrafast).; US1ML: Significantly faster recovery time (ultrafast).
Vf1.3V1.3V1.7V1.7V1.3V / 1.7V — Forward voltage matches.; US2MW: Higher forward voltage increases power loss.; U1M: Higher forward voltage increases power loss.; US1ML: Higher forward voltage increases power loss.

Application & sourcing insights

Questions & answers

Verified drop-in options for DFR1M 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.