Is there a pin-compatible replacement for SS34A?

Yes, several parts are pin-compatible replacements for SS34A. SS34 is a direct match, while SS36 and SS56 are pin-compatible upgrades in the same DO-214AC (SMA) package.

What risks should I check before replacing SS34A?

Before replacing SS34A, the primary risk to check is the package. Ensure the replacement is in a DO-214AC (SMA) package, not SMB or SMC. Also, verify the forward voltage (Vf) to ensure thermal performance is not negatively impacted.

SS34A Alternatives, Datasheet & Cross Reference | Yangjie Technology

The SS34A is a 40V, 3A Schottky diode in a standard SMA package, commonly used in power applications. Several pin-compatible replacements and upgrades are available from multiple manufacturers, making it easy to source alternatives.

AI replacement insight

Electrical risklow

Most alternatives have equal or better voltage/current ratings. Check forward voltage for thermal impact.

Package riskhigh

The SS3x family has SMA, SMB, and SMC variants which are not interchangeable. Verify the package suffix.

Sourcing risklow

This is a high-volume, multi-source component family, making sourcing generally easy.

Can it be replaced directly?

Yes, SS34 is a direct, pin-compatible replacement for SS34A from multiple manufacturers. SS56 is a pin-compatible upgrade.

Best replacement path

The most direct replacement is SS34, which is a multi-source part with identical ratings and a more efficient forward voltage. For an upgrade, SS56 offers higher voltage and current in the same package.

Main risk

The main risk is selecting a part with a different package (e.g., SMB, SMC, SMAF) which would require a PCB layout change. Always verify the package code.

Recommended alternatives

Matches package, voltage, and current, with a lower forward voltage for better efficiency.

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Alternative comparison matrix

Feature / factor	SS34A	SS34	SS56	SS36	Compatibility / risk
Polarity Or Type	Schottky	Schottky	-	-	Schottky — Diode type matches.
Package	DO-214AC (SMA)	DO-214AC (SMA)	DO-214AC (SMA)	DO-214AC (SMA)	DO-214AC (SMA) — Package is a direct match.; SS56: Package is a direct match.; SS36: Package is a direct match.
Voltage	40V	40V	60V	60V	40V / 60V — Reverse voltage rating matches.; SS56: Higher voltage rating provides more design margin.; SS36: Higher voltage rating provides more design margin.
Current	3A	3A	5A	3A	3A / 5A — Average forward current matches.; SS56: Higher current rating provides more design margin.; SS36: Average forward current matches.
Voltage Forward	0.7V @ 3A	0.5V - 0.55V @ 3A	0.7V @ 5A	0.75V @ 3A	0.5V - 0.55V @ 3A / 0.7V @ 5A / 0.75V @ 3A — Lower forward voltage improves efficiency.; SS56: Vf at 3A is likely comparable or better.; SS36: Slightly higher Vf may increase power loss.

Application & sourcing insights

Questions & answers

The best alternative is SS34, which offers identical ratings and a better forward voltage in the same package. For a more robust design, SS56 is an excellent upgrade with higher voltage and current ratings.