Is there a pin-compatible replacement for SS14 SMB?

Yes, parts like UMW SS26B, SS36B, and SS510B are pin-compatible as they are single diodes in the same SMB package. However, electrical differences like forward voltage must be reviewed before substitution.

What risks should I check before replacing SS14 SMB?

The main risk is a higher forward voltage (Vf) in replacements, which increases power loss and heat. Also verify reverse leakage current (Ir) if your application is sensitive to it.

SS14 SMB Alternatives, Datasheet & Cross Reference | BORN

Finding a substitute for the SS14 SMB 40V, 1A Schottky diode involves matching the SMB package and ensuring key electrical ratings like forward voltage meet application needs. Alternatives often provide higher voltage and current ratings but may have a higher Vf.

AI replacement insight

Electrical riskmedium

Higher forward voltage (Vf) in all viable candidates will increase power loss.

Package risklow

SMB (DO-214AA) is a standard package with good availability.

Can it be replaced directly?

No confirmed drop-in replacement exists. Candidates like UMW SS26B are pin-compatible with upgraded ratings but have a higher forward voltage, requiring engineering review.

Best replacement path

Prioritize Schottky diodes in an SMB package with voltage ≥ 40V and current ≥ 1A. UMW SS26B is a close option to evaluate.

Main risk

The primary risk is increased power dissipation and heat from a higher forward voltage (Vf) in alternatives.

Recommended alternatives

A strong alternative Schottky diode in a compatible SMB package with upgraded voltage and current ratings.

View details

Alternative comparison matrix

Feature / factor	SS14 SMB	UMW SS26B	UMW SS36B	UMW SS510B	Compatibility / risk
Package	SMB (DO-214AA)	SMB	SMB (DO-214AA)	SMB	SMB / SMB (DO-214AA) — Form factor compatible.; UMW SS36B: Form factor compatible.; UMW SS510B: Form factor compatible.
Voltage	40V	60V	60V	100V	60V / 100V — Higher voltage rating provides more margin.; UMW SS36B: Higher voltage rating provides more margin.; UMW SS510B: Higher voltage rating provides more margin.
Current	1.0A	2.0A	3.0A	5.0A	2.0A / 3.0A / 5.0A — Higher current rating.; UMW SS36B: Higher current rating.; UMW SS510B: Higher current rating.
Forward Voltage	0.55V @ 1A	0.7V @ 2A	0.75V @ 3A	0.85V @ 3A	0.7V @ 2A / 0.75V @ 3A / 0.85V @ 3A — Higher Vf increases power loss. Verify thermal impact.; UMW SS36B: Higher Vf increases power loss. Verify thermal impact.; UMW SS510B: Higher Vf increases power loss. Verify thermal impact.
Diode Type	Schottky (implied)	Schottky	Schottky	Schottky	Schottky — Functionally similar diode type.; UMW SS36B: Functionally similar diode type.; UMW SS510B: Functionally similar diode type.

Application & sourcing insights

Questions & answers

UMW SS26B is a strong alternative, offering higher ratings (60V, 2A) in the same SMB package. However, its forward voltage is higher, so its thermal impact should be checked in your design.