Is there a pin-compatible replacement for SS32?

Yes, several pin-compatible replacements for the SS32 are available. The SS34, SS36, and SS56 all come in the same DO-214AC (SMA) package and can be used as drop-in replacements, though their electrical parameters vary.

What risks should I check before replacing SS32?

Before replacing SS32, check the substitute's forward voltage (Vf); a higher Vf will increase power loss and heat. Also, confirm the package is identical (DO-214AC or SMA), as some functional alternatives like the SK34 come in a different package and require a new PCB layout.

SS32 Alternatives, Datasheet & Cross Reference | onsemi

Find reliable, pin-compatible alternatives and upgrade paths for the SS32 Schottky diode. This guide helps you navigate replacements like the SS34 and SS36, detailing key parametric differences to ensure design success.

AI replacement insight

Electrical riskmedium

Substituting with a part having higher forward voltage (Vf) will increase power loss and may require thermal re-evaluation.

Package risklow

Many alternatives exist in the same DO-214AC (SMA) package, but some functional matches use different packages (SMB, SMC) that require a new layout.

Sourcing risklow

The SS3x series is widely available from multiple manufacturers, reducing sourcing risk.

Can it be replaced directly?

Yes, several pin-compatible replacements exist for the SS32, such as the SS34 and SS36, which are part of the same product family from multiple manufacturers.

Best replacement path

The SS34 offers a direct upgrade path with a higher 40V rating and better efficiency (lower Vf) in the same SMA package, making it the top choice.

Main risk

The primary risk is increased power dissipation if a substitute has a higher forward voltage (Vf). Non-pin-compatible parts like the SK34 (SMC) require PCB redesign.

Recommended alternatives

An excellent upgrade with a higher voltage rating and better efficiency in the same package.

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Alternative comparison matrix

Feature / factor	SS32	SS34	SS36	SK34	Compatibility / risk
Package	DO-214AC (SMA)	DO-214AC, SMA	DO-214AC (SMA)	DO-214AB (SMC)	DO-214AC, SMA / DO-214AC (SMA) / DO-214AB (SMC) — Package matches, enabling drop-in replacement.; SS36: Package matches, enabling drop-in replacement.; SK34: Larger SMC package is not a drop-in for SMA footprint.
Voltage	20.0V	40.0V	60.0V	40.0V	40.0V / 60.0V — Higher voltage rating provides increased design margin.; SS36: Higher voltage rating provides increased design margin.; SK34: Higher voltage rating provides increased design margin.
Current	3.0A	3.0A	3.0A	3.0A	3.0A — Average rectified current matches the target.; SS36: Average rectified current matches the target.; SK34: Average rectified current matches the target.
Voltage Forward Vf	550 mV @ 3 A	500 mV @ 3 A	750 mV @ 3 A	-	500 mV @ 3 A / 750 mV @ 3 A — Lower forward voltage improves efficiency.; SS36: Higher forward voltage will increase power dissipation.

Application & sourcing insights

Questions & answers

The best alternative to the SS32 is the SS34. It is pin-compatible, has the same 3A current rating, a higher 40V reverse voltage for better protection, and a lower forward voltage for improved efficiency.