What risks should I check before replacing SK33B-LTP?

The main risk is the higher forward voltage (VF) of replacements (~0.7V vs. the original's 0.5V), which increases power loss and heat. Verify that your design can tolerate this change.

SK33B-LTP Alternatives, Datasheet & Cross Reference | Micro Commercial Components Corp.

SK33B-LTP is a 3A, 30V Schottky diode in an SMB package, now marked 'Not For New Designs'. Pin-compatible alternatives with upgraded 60V, 5A ratings are available but require review for electrical differences.

AI replacement insight

Electrical riskmedium

Higher forward voltage (~0.7V vs 0.5V) increases power loss and may affect circuit efficiency and thermals.

Package risklow

Candidates SS56B and SS56L use the same SMB (DO-214AA) package, but verifying datasheet dimensions is recommended.

Sourcing risklow

The target is NRND, while recommended alternatives are active and widely available.

Can it be replaced directly?

Direct replacement for SK33B-LTP should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

Replace with a 60V, 5A Schottky diode in the same SMB package, such as SS56B or SS56L.

Main risk

Increased power dissipation and heat due to a higher forward voltage (VF) compared to the original part.

Recommended alternatives

A pin-compatible alternative in the same SMB package with higher voltage and current ratings.

View details

Alternative comparison matrix

Feature / factor	SK33B-LTP	SS56B	SS56L	Compatibility / risk
Package	DO-214AA, SMB	DO-214AA (SMB)	SMB/DO-214AA	DO-214AA (SMB) / SMB/DO-214AA — Package name matches, enabling form-fit replacement.; SS56L: Package name matches, enabling form-fit replacement.
Voltage	30V	60V	60V	60V — Higher voltage rating provides increased design margin.; SS56L: Higher voltage rating provides increased design margin.
Current	3A	5A	5A	5A — Higher current rating provides increased design margin.; SS56L: Higher current rating provides increased design margin.
Forward Voltage	0.5V	~0.7V	~0.72V	~0.7V / ~0.72V — Higher VF increases power loss; must verify thermal impact.; SS56L: Higher VF increases power loss; must verify thermal impact.
Temperature	-55°C to +125°C	-55°C to +150°C	-55°C to +150°C	-55°C to +150°C — Wider operating range.; SS56L: Wider operating range.

Application & sourcing insights

Questions & answers

Verified drop-in options for SK33B-LTP 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.