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Best Alternatives to RS1ML

Package: SOD123FLTaiwan Semiconductor Co., Ltd.RectifiersMaximum Recurrent Peak Reverse Voltage: 1000 VMaximum RMS Voltage: 700 VMaximum DC Blocking Voltage: 1000 VAverage Forward Rectified Current: 1.0 A at Ta = 25 °CForward Voltage: 1.3 V max. at 1.0 A

Find and compare replacements for the RS1ML, a 1000V, 1A fast recovery diode in a SOD-123FL package. This guide reviews alternatives based on key electrical and mechanical parameters.

AI replacement insight

Electrical riskhigh

Using a diode with incorrect recovery time (trr) or higher forward voltage (Vf) can cause circuit failure or overheating.

Package risklow

The SOD-123FL package is standardized, but minor dimensional differences between manufacturers should be checked.

Can it be replaced directly?

Direct replacement for RS1ML should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

The FR107 series from various manufacturers offers the closest parametric match, sharing the same voltage, current, package, and 500ns recovery time.

Main risk

The primary risk is substituting with a standard recovery diode (e.g., 1N4007 variants), which will cause excessive switching losses and potential circuit failure.

Recommended alternatives

3
FR107 F7 package
FR107 F7

MSKSEMI

Needs validationlow risk

A strong alternative with matching package, voltage, current, and fast recovery time. Requires datasheet review.

View details

Alternative comparison matrix

Feature / factorRS1MLFR107 F7FR107US1MWCompatibility / risk
PackageSOD-123FLSOD-123FLSOD-123FLSOD-123FLSOD-123FL — Package matches target.; FR107: Package matches target.; US1MW: Package matches target.
Voltage1000V1000V1000V-1000V — Reverse voltage matches.; FR107: Reverse voltage matches.
Current1.0A1.0A1.0A-1.0A — Forward current matches.; FR107: Forward current matches.
Recovery Time500ns500ns~500ns75ns500ns / ~500ns / 75ns — Fast recovery time matches target spec.; FR107: Fast recovery time matches target spec.; US1MW: Much faster recovery time (ultra-fast).
Forward Voltage1.3V1.3V-1.7V1.3V / 1.7V — Forward voltage matches target.; US1MW: Higher forward voltage will increase power loss.

Application & sourcing insights

Questions & answers

Verified drop-in options for RS1ML 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.