Is there a pin-compatible replacement for SMF16A?

Several parts like SMF18A and SMFJ15A share the same SOD-123FL package and are pin-compatible. However, their electrical parameters differ significantly, posing a risk. A full datasheet review is essential.

What risks should I check before replacing SMF16A?

Key risks include polarity (must be unidirectional), standoff voltage (must be >= 16V), and peak pulse current (must be >= 7.7A). Using a part with lower ratings can lead to premature failure or inadequate circuit protection.

SMF16A Alternatives, Datasheet & Cross Reference | GOODWORK

Finding a replacement for the SMF16A TVS diode requires careful attention to its unidirectional polarity, 16V standoff voltage, and 7.7A peak current rating in the SOD-123FL package.

AI replacement insight

Electrical riskhigh

All candidates have critical parametric differences (voltage or current).

Package risklow

Candidates share the same SOD-123FL package.

Can it be replaced directly?

No, a direct, fully equivalent replacement for the SMF16A was not identified. All viable candidates have parametric differences that introduce risk.

Best replacement path

No direct replacement found. The closest options are parametric downgrades requiring engineering review.

Main risk

The main risks are using a part with insufficient peak current rating or a lower standoff voltage, which could lead to inadequate protection or circuit malfunction.

Recommended alternatives

Shares the same package and polarity but has a lower standoff voltage, posing a downgrade risk.

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Alternative comparison matrix

Feature / factor	SMF16A	SMF18A	SMFJ15A	Compatibility / risk
Package	SOD-123FL	SOD-123FL	SOD-123FL	SOD-123FL — Package appears to be form-fit compatible.; SMFJ15A: Package appears to be form-fit compatible.
Polarity	Unidirectional	Unidirectional	Unidirectional	Unidirectional — Polarity matches target.; SMFJ15A: Polarity matches target.
Voltage	16V	18V	15V	18V / 15V — Higher standoff voltage is generally safe.; SMFJ15A: Lower standoff voltage may cause premature clamping.
Current	7.7A	6.8A	8.2A	6.8A / 8.2A — Lower peak pulse current offers less protection.; SMFJ15A: Higher peak pulse current rating is acceptable.
Power	200W	200W	200W	200W — Peak pulse power matches.; SMFJ15A: Peak pulse power matches.

Application & sourcing insights

Questions & answers

No direct drop-in replacement was found. Alternatives like SMF18A have a lower current rating, and SMFJ15A has a lower voltage rating. Both require careful engineering review for your specific application.