What risks should I check before replacing DHE1M?

The main risk is using a diode with a slower reverse recovery time (trr). Using a 'standard' or 'fast' recovery diode (trr > 150ns) instead of a 'super fast' one (trr=75ns) can cause excessive heat, reduced efficiency, or circuit failure in high-frequency applications. Always verify the trr specification.

DHE1M Alternatives, Datasheet & Cross Reference | FUXINSEMI

DHE1M is a 1000V, 1A super-fast rectifier (75ns) in a SOD-123FL package. Finding a replacement requires matching not only voltage and current but also the critical reverse recovery time (trr) to ensure circuit performance.

AI replacement insight

Electrical riskhigh

High risk if reverse recovery time (trr) is not matched. Slower diodes can cause inefficiency and failure.

Package risklow

SOD-123FL is a common, standardized package, minimizing physical compatibility issues.

Can it be replaced directly?

Direct replacement for DHE1M should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

The onsemi US1MFA is the best replacement path, offering identical key parameters and AEC-Q101 qualification.

Main risk

Using a substitute with a slower reverse recovery time (trr > 75ns), which can lead to circuit malfunction.

Recommended alternatives

Excellent match with identical package, voltage, current, and critical 75ns reverse recovery time.

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Alternative comparison matrix

Feature / factor	DHE1M	US1MFA	FFM107-M	RS2MW	Compatibility / risk
Package	SOD-123FL	SOD-123FL	SOD-123FL	SOD-123FL	SOD-123FL — Package matches.; FFM107-M: Package matches.; RS2MW: Package matches.
Voltage	1000V	1000V	1000V	1000V	1000V — Reverse voltage matches.; FFM107-M: Reverse voltage matches.; RS2MW: Reverse voltage matches.
Current	1.0A	1.0A	1.0A	2.0A	1.0A / 2.0A — Forward current matches.; FFM107-M: Forward current matches.; RS2MW: Higher current rating is generally acceptable.
Trr	75ns	75ns	500ns	500ns	75ns / 500ns — Reverse recovery time matches.; FFM107-M: Significantly slower recovery time.; RS2MW: Significantly slower recovery time.
Vf	1.7V	1.7V	-	-	1.7V — Forward voltage matches.

Application & sourcing insights

Questions & answers

Verified drop-in options for DHE1M 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.