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Best Alternatives to 1N4004

Package: DO-214AC/SMATWGMCDiodesReverse Voltage (Vr): 400 VAverage Forward Rectified Current: 1 AForward Voltage (Vf): 1.1 VPeak Forward Surge Current: 30 AReverse Leakage Current: 5 uA

1N4004 is a 400V 1A SMA rectifier. Same-package candidates exist, but none are verified pin-compatible from the provided evidence.

AI replacement insight

Electrical riskmedium

V/I ok for kept parts; Vf, surge, temp need checks.

Package risklow

Kept parts state SMA package.

Firmware risklow

Discrete diode only.

Sourcing riskmedium

PDF checks remain pending.

Can it be replaced directly?

Direct replacement for 1N4004 should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

Review S2M first, then RS1M, using datasheet pinout and surge checks.

Main risk

Pinout and full electrical limits were not verified.

Recommended alternatives

2
S2M package
S2M

MDD

Needs validationmedium risk

S2M matches SMA size and exceeds 1N4004 V/I ratings, with pinout and full datasheet checks still needed.

View details

Alternative comparison matrix

Feature / factor1N4004S2MRS1MAlt 3Compatibility / risk
PackageDO-214AC/SMADO-214AC/SMA-SMA (DO-214AC) — Same outline stated.
Pinout2 pins2 pins; map missing-2 pins; map missing — Pin function not checked.
Voltage400V1000V-1000V — Meets margin.
Current1A2A-1A — Same Io.
Temperature-55 to +150Cmissing-missing — Need datasheet check.
Applicationstandard rectifier-fast recovery rectifierfast recovery rectifier — Check Vf and trr needs.

Application & sourcing insights

Questions & answers

Verified drop-in options for 1N4004 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.