Is there a pin-compatible replacement for SMF5.0A?

Yes, the SMF5.0A is a standard part number. Versions from manufacturers like MDD, onsemi, and Littelfuse are typically pin-compatible, but verifying the SOD-123FL package dimensions is recommended.

What risks should I check before replacing SMF5.0A?

Key risks include polarity, package, and electrical ratings. Ensure the replacement is unidirectional, fits the SOD-123FL footprint, and meets or exceeds the 5V standoff voltage, 200W power, and 21.7A peak current ratings.

SMF5.0A Alternatives, Datasheet & Cross Reference | Microdiode Semiconductor (Shenzhen) Co., Ltd.

Find pin-compatible and functional alternatives for the SMF5.0A, a 200W, 5V unidirectional TVS diode in a SOD-123FL package. Review key parametric differences before selection.

AI replacement insight

Electrical riskhigh

Incorrect polarity (bidirectional) or lower current/power ratings can lead to circuit failure.

Package risklow

SOD-123FL is a standard package, but minor dimensional differences between vendors should be checked.

Sourcing risklow

This is a multi-sourced, high-volume part, making sourcing generally easy.

Can it be replaced directly?

Yes, the SMF5.0A from other manufacturers is a strong candidate for direct replacement, sharing the same package and key electrical ratings.

Best replacement path

Use SMF5.0A from a different qualified manufacturer like onsemi, Littelfuse, or Yangjie Technology.

Main risk

The main risks are using a bidirectional version (e.g., SMF5.0CA) by mistake or selecting a part with a lower current rating.

Recommended alternatives

A cross-vendor alternative with matching key electrical parameters and package. Final footprint verification is advised.

View details

Alternative comparison matrix

Feature / factor	SMF5.0A	SMF5.0A	SMF5.0CA	Compatibility / risk
Package	SOD-123FL	SOD-123FL	SOD-123FL / SOD-123	SOD-123FL / SOD-123FL / SOD-123 — Minor variations (SOD-123F) exist, verify footprint.; SMF5.0CA: Form factor is compatible.
Polarity	Unidirectional	Unidirectional	Bidirectional	Unidirectional / Bidirectional — Polarity matches target.; SMF5.0CA: Candidate is bidirectional, target is unidirectional.
Voltage	5.0V	5.0V	5.0V	5.0V — Reverse standoff voltage matches.; SMF5.0CA: Reverse standoff voltage matches.
Current	21.7A	21.7A	21.7A	21.7A — Peak pulse current matches.; SMF5.0CA: Peak pulse current matches.
Power	200W	200W	-	200W — Peak pulse power matches.

Application & sourcing insights

Questions & answers

The best alternative is the SMF5.0A from other manufacturers like onsemi, Littelfuse, or Yangjie Technology, which offers the same specifications in a compatible package.