Is there a pin-compatible replacement for 1SMB5935BT3G?

While parts like 1SMB5949BT3G share the same SMB package and pinout, their electrical characteristics, specifically the Zener voltage, are not compatible with the 27V target. They are form-fit compatible, not electrically compatible.

What risks should I check before replacing 1SMB5935BT3G?

The main risk is electrical incompatibility. Using a Zener diode with a different voltage (e.g., 100V instead of 27V) will cause circuit malfunction and may damage other components. Always verify Zener voltage, power rating, and tolerance before substitution.

1SMB5935BT3G Alternatives, Datasheet & Cross Reference | onsemi

Reviewing alternatives for the onsemi 1SMB5935BT3G, a 27V 3W Zener diode in an SMB package. While no direct drop-in replacements were found, several parts from the same family offer different voltage ratings for other applications.

AI replacement insight

Electrical riskhigh

Substituting with a different Zener voltage will cause improper circuit operation.

Package risklow

Many alternatives share the same SMB package, ensuring physical compatibility.

Can it be replaced directly?

No, a direct drop-in replacement for 1SMB5935BT3G was not found. Alternatives from the same family have incompatible Zener voltages.

Best replacement path

Search for Zener diodes with Vz=27V, Pd>=3W in an SMB (DO-214AA) package from other manufacturers.

Main risk

The primary risk is electrical damage or circuit malfunction due to using a part with an incorrect Zener voltage.

Recommended alternatives

Shares package and power rating but has a much higher Zener voltage (100V vs 27V).

View details

Alternative comparison matrix

Feature / factor	1SMB5935BT3G	1SMB5949BT3G	1SMB5956BT3G	Compatibility / risk
Package	SMB (DO-214AA)	SMB (DO-214AA)	SMB (DO-214AA)	SMB (DO-214AA) — Package matches, ensuring form-fit compatibility.; 1SMB5956BT3G: Package matches, ensuring form-fit compatibility.
Power	3.0W	3.0W	3.0W	3.0W — Power dissipation rating is identical.; 1SMB5956BT3G: Power dissipation rating is identical.
Voltage	27.0V	100.0V	200.0V	100.0V / 200.0V — Zener voltage is significantly higher, not a direct replacement.; 1SMB5956BT3G: Zener voltage is extremely high compared to target.
Current	1.0µA	1.0µA	Not specified	1.0µA / Not specified — Reverse leakage current matches.; 1SMB5956BT3G: Reverse leakage current is missing from candidate specs.

Application & sourcing insights

Questions & answers

Currently, no direct replacement for the 1SMB5935BT3G has been identified. Alternatives like 1SMB5949BT3G exist in the same product family but have significantly different Zener voltages (e.g., 100V) and require circuit redesign.