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Best Alternatives to SMC24

Package: SOT23LeiditechCircuit ProtectionProduct Type: Overvoltage and Overcurrent Protection Devices ESD Suppressor / TVS DiodesPackage / Case: SOT23Series: -Peak Pulse Current (Ipp)@10/1000us: 5AMaximum Clamping Voltage: 45V

The SMC24 from Leiditech is a 24V, 300W bidirectional TVS diode in a common SOT-23 package, designed for protecting two data lines. When seeking alternatives, prioritize matching the 24V standoff voltage, SOT-23 package, and ensuring the power rating is 300W or higher.

AI replacement insight

Electrical riskmedium

Must match voltage and meet or exceed power rating. Lower power parts are a high risk.

Package risklow

SOT-23 is a standard package, but pinout must be confirmed.

Sourcing risklow

Many manufacturers produce similar 24V SOT-23 TVS diodes.

Can it be replaced directly?

Direct replacement for SMC24 should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

Upgrade to NUP2105LT1G for higher power handling and AEC-Q101 qualification.

Main risk

The main risk is selecting a substitute with a lower power rating, which may not provide adequate surge protection.

Recommended alternatives

2
NUP2105LT1G package
NUP2105LT1G

Catalyst Semiconductor Inc.

Needs validationlow risk

A potential pin-compatible upgrade with a higher power rating (350W) and AEC-Q101 qualification.

View details

Alternative comparison matrix

Feature / factorSMC24NUP2105LT1GPESD1CANAlt 3Compatibility / risk
PackageSOT-23SOT-23SOT-23SOT-23 — Package matches.; PESD1CAN: Package matches.
Power300W350W280W350W / 280W — Higher power rating provides more protection.; PESD1CAN: Slightly lower power rating requires review.
Voltage24V24V24V24V — Working voltage matches.; PESD1CAN: Working voltage matches.
PolarityBi-directionalBi-directionalBidirectionalBi-directional / Bidirectional — Functionally matches for 2-line protection.; PESD1CAN: Functionally matches.
ApplicationAEC-Q101AEC-Q101-AEC-Q101 — Qualified for automotive use.

Application & sourcing insights

Questions & answers

Verified drop-in options for SMC24 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.