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Best Alternatives to FM407

Package: DO-214AC (SMA)LRCDiodes - Rectifiers - SingleMaximum Repetitive Peak Reverse Voltage: 1000 VMaximum Average Forward Rectified Current: 1.0 AMaximum Instantaneous Forward Voltage: 1.1 VMaximum DC Reverse Current: 5.0 µAPeak Forward Surge Current: 30 A

FM407 is a common 1A, 1000V general-purpose rectifier in an SMA package. Several pin-compatible alternatives like the M7 series exist with matching or improved voltage and current ratings.

AI replacement insight

Electrical riskmedium

Ensure replacement is a standard rectifier with similar forward voltage (Vf).

Package risklow

Verify package variants like SMAE are footprint-compatible if a standard SMA is not chosen.

Can it be replaced directly?

Yes, the M7 1N4007 is a direct, industry-standard replacement for the FM407.

Best replacement path

Use an M7 (1N4007 SMA version) from a reputable manufacturer like JUXING or an upgraded part like SM520.

Main risk

Accidentally substituting a fast-recovery diode, which can have higher forward voltage and cause excess heat or circuit noise.

Recommended alternatives

4
M7 1N4007 package
M7 1N4007

JUXING

Needs validationlow risk

Directly equivalent M7 (1N4007 SMA) general purpose rectifier with identical key ratings and package.

View details

Alternative comparison matrix

Feature / factorFM407M7 1N4007M520SM520Compatibility / risk
PackageDO-214AC (SMA)DO-214AC (SMA)DO-214AC (SMA)DO-214AC (SMA)DO-214AC (SMA) / DO-214AC (SMAE) — Package matches target.; M520: Package matches target.; SM520: Package matches target.; M7-TP: SMAE variant may have different height; footprint is usually compatible.
Voltage1000V1000V2000V2000V1000V / 2000V — Voltage rating matches target.; M520: Higher voltage rating provides more design margin.; SM520: Higher voltage rating provides more design margin.; M7-TP: Voltage rating matches target.
Current1.0A1.0A1.0A1.5A1.0A / 1.5A — Current rating matches target.; M520: Current rating matches target.; SM520: Higher current rating provides more design margin.; M7-TP: Current rating matches target.
Diode TypeStandardStandardStandardStandardStandard — Matches target's general purpose rectifier type.; M520: Matches target's general purpose rectifier type.; SM520: Matches target's general purpose rectifier type.

Application & sourcing insights

Questions & answers

The M7 1N4007 from JUXING is a direct, industry-standard equivalent. The SM520 from GOODWORK is also an excellent choice, offering higher voltage and current ratings for more design margin.