ProjectsPricingInsights

Best Alternatives to M1

Package: SMA (DO-214AC)Slkor(SLKORMICRO Elec.)DiodesRectified Current: 1 AReverse Voltage (Vr): 50 VForward Voltage (Vf): 1.1 VPeak Forward Surge Current: 30 AReverse Leakage Current: 5 µA

M1 is a common 1A, 50V general-purpose rectifier in an SMA package. Several alternatives exist, including faster ultra-fast diodes and more efficient Schottky rectifiers with higher voltage or current ratings.

AI replacement insight

Electrical riskmedium

Change in diode type (speed, Vf, leakage) requires verification in the specific application.

Package risklow

All suggested alternatives use the same SMA package.

Sourcing risklow

Candidates are common diode types available from multiple manufacturers.

Can it be replaced directly?

There are no identical cross-vendor parts for M1, but several pin-compatible functional alternatives like US1D (ultra-fast) and SS58 (Schottky) are available.

Best replacement path

Upgrade to a higher-rated Schottky diode like SS58 for improved current handling and efficiency.

Main risk

The main risk is the change in diode technology from general-purpose to ultra-fast or Schottky, which alters switching speed and forward voltage drop.

Recommended alternatives

5
SS56A package
SS56A

FUXINSEMI

Needs validationlow risk

A robust 60V, 5A Schottky rectifier in the same SMA package, offering superior ratings.

View details

Alternative comparison matrix

Feature / factorM1SS56ASS58STTH1R06ACompatibility / risk
PackageSMA (DO-214AC)SMA (DO-214AC)SMA (DO-214AC)SMASMA (DO-214AC) — matched; SS58: matched; STTH1R06A: matched; US1D: Package is form-fit compatible.
Voltage50V60V80V600V60V / 80V / 600V / 200V — Higher voltage rating.; SS58: Higher voltage rating.; STTH1R06A: Vastly superior voltage rating.; US1D: Significantly higher voltage rating provides more margin.
Current1.0A5.0A5.0A1.0A5.0A / 1.0A — Significantly higher current rating provides excellent margin.; SS58: Significantly higher current rating provides excellent margin.; STTH1R06A: matched; US1D: matched
ApplicationGeneral PurposeSchottkySchottkyUltrafastSchottky / Ultrafast / Ultra-Fast — Schottky diode offers lower Vf but has different leakage characteristics.; SS58: Schottky diode offers lower Vf but has different leakage characteristics.; STTH1R06A: Candidate is an ultrafast rectifier, target is general purpose.; US1D: Candidate is an ultra-fast rectifier, target is general purpose. Faster switching is usually acceptable.

Application & sourcing insights

Questions & answers

For a robust upgrade, SS58 or SS56A offer higher current (5A) and voltage ratings in the same package. For a closer match, US1D is a 1A ultra-fast diode with a higher 200V rating.