What risks should I check before replacing RS1G?

First, ensure the replacement has a voltage rating of at least 400V and is a 'Fast' or 'Super Fast' recovery type, not 'Standard' or 'Schottky'. Second, confirm the package is DO-214AC (SMA) for a direct fit. Finally, check if a much faster recovery time is acceptable for your circuit.

RS1G Alternatives, Datasheet & Cross Reference | Yangjie Technology

RS1G is a 400V, 1A fast recovery diode in a common SMA package. Finding a substitute involves matching these key parameters and ensuring the package is compatible for a drop-in replacement.

AI replacement insight

Electrical riskhigh

Using a Standard or Schottky diode instead of Fast Recovery will likely cause malfunction.

Package riskmedium

Ensure replacement is in a DO-214AC/SMA package to avoid board redesign.

Can it be replaced directly?

Direct replacement for RS1G should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

ES1G is the best replacement path, offering identical key ratings and package with improved recovery speed.

Main risk

The main risk is using a diode with the wrong type (e.g., Standard or Schottky) or an insufficient voltage rating, which can lead to circuit failure.

Recommended alternatives

ES1G is a strong alternative with matching key electricals, package, and a faster recovery time.

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Alternative comparison matrix

Feature / factor	RS1G	ES1G	ES2JF	Compatibility / risk
Package	DO-214AC, SMA	DO-214AC (SMA)	SMAF	DO-214AC (SMA) / SMAF — Package appears identical.; ES2JF: Not a drop-in replacement; requires layout change.
Voltage	400V	400V	600V	400V / 600V — Voltage rating matches.; ES2JF: Higher voltage rating provides more margin.
Current	1.0A	1.0A	2.0A	1.0A / 2.0A — Current rating matches.; ES2JF: Higher current rating.
Trr	150ns	35ns	35ns	35ns — Significantly faster recovery time is an upgrade.; ES2JF: Significantly faster recovery time.
Vf	1.3V @ 1A	1.3V @ 1A	1.7V	1.3V @ 1A / 1.7V — Forward voltage matches.; ES2JF: Higher forward voltage may increase power loss.

Application & sourcing insights

Questions & answers

Verified drop-in options for RS1G 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.