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Best Alternatives to SMFJ24A

Package: SOD-123FLMentechTVS - DiodesDevice type: Unidirectional TVS diodePeak pulse power: 200 W at 10/1000 usReverse stand-off voltage: 24 VBreakdown voltage: 26.7–29.5 V at 1 mAMaximum clamping voltage: 38.9 V at 5.1 A

Finding a substitute for the SMFJ24A TVS diode requires careful matching of its 24V unidirectional protection in a SOD-123FL package. Alternatives exist but often have different voltage or current ratings.

AI replacement insight

Electrical riskhigh

Standoff voltage and peak current mismatches are common in candidates.

Package risklow

The SOD-123FL package is common, and several candidates match it.

Can it be replaced directly?

There are no confirmed direct, pin-to-pin replacements for SMFJ24A. All candidates require engineering review due to parametric differences.

Best replacement path

No direct drop-in replacement was found. SMFJ26A is parametrically closest but requires review of its higher standoff voltage and lower current rating.

Main risk

The primary risk is mismatch in standoff voltage (Vrwm), which can either leave the circuit unprotected or cause false clamping during normal operation.

Recommended alternatives

2
SMFJ26A package
SMFJ26A

RUILON

Needs validationmedium risk

A close unidirectional TVS, but with slightly higher voltage and lower current ratings.

View details

Alternative comparison matrix

Feature / factorSMFJ24ASMFJ26ASMF28AAlt 3Compatibility / risk
PackageSOD-123FLSOD-123FLSOD-123FLSOD-123FL — Package matches, likely form-fit compatible.; SMF28A: Package matches, likely form-fit compatible.
Polarity Or TypeUnidirectionalUnidirectionalUnidirectionalUnidirectional — Polarity matches.; SMF28A: Polarity matches.
Voltage V24.0V26.0V28.0V26.0V / 28.0V — Slightly higher standoff voltage may reduce protection margin.; SMF28A: Higher standoff voltage may not protect a 24V system adequately.
Current A5.1A4.8A4.4A4.8A / 4.4A — Slightly lower peak pulse current rating.; SMF28A: Lower peak pulse current rating reduces surge protection capability.

Application & sourcing insights

Questions & answers

SMFJ26A is a potential alternative, but its 26V standoff voltage and 4.8A current rating are different from the target's 24V and 5.1A, requiring circuit validation.