Is there a pin-compatible replacement for BZX84C15LT1G?

Yes, parts from the onsemi BZX84Cxx series like BZX84C16LT1G and BZX84C18LT1G share the same SOT-23 package and pinout, but have different Zener voltages. Pinout should always be verified from the datasheet before use.

What risks should I check before replacing BZX84C15LT1G?

The main risk is the Zener voltage (Vz). Ensure your circuit can tolerate a higher regulation voltage (e.g., 16V or 18V). Also, verify the Zener impedance and tolerance specs for your application.

BZX84C15LT1G Alternatives, Datasheet & Cross Reference | onsemi

Find and compare alternatives for the onsemi BZX84C15LT1G, a 15V, 250mW Zener diode in a SOT-23 package. This guide helps you evaluate substitutes based on key electrical and mechanical parameters.

AI replacement insight

Electrical riskmedium

All candidates have a different Zener voltage, which will alter the circuit's regulation point.

Package risklow

All suggested alternatives use the same SOT-23 package, but pinout for cross-vendor parts needs verification.

Can it be replaced directly?

No exact drop-in replacement was found. The closest options have slightly different Zener voltages and require engineering review.

Best replacement path

BZX84C16LT1G from the same onsemi family is the closest option, with a slightly higher 16V rating.

Main risk

The primary risk is a shift in the voltage regulation point due to Zener voltage differences in all available alternatives.

Recommended alternatives

Close alternative from the same family with identical package and power, but a slightly higher 16V Zener voltage.

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Alternative comparison matrix

Feature / factor	BZX84C15LT1G	BZX84C16LT1G	BZX84C18LT1G	BZX84B18_R1_00001	Compatibility / risk
Package	SOT-23	SOT-23 (TO-236)	SOT-23	SOT-23	SOT-23 (TO-236) — Package is form-fit compatible.; BZX84C18LT1G: Package is form-fit compatible.; BZX84B18_R1_00001: Package is form-fit compatible.
Voltage	15.0V	16.0V	18.0V	18.0V	16.0V / 18.0V — Slightly higher Zener voltage.; BZX84C18LT1G: Zener voltage is 20% higher.; BZX84B18_R1_00001: Zener voltage is 20% higher.
Power	250mW	250mW	250mW	410mW	250mW / 410mW — Identical power rating.; BZX84C18LT1G: Identical power rating.; BZX84B18_R1_00001: Higher power rating provides more margin.
Manufacturer	onsemi	onsemi	-	Panjit	onsemi / Panjit — Same manufacturer and product family.; BZX84B18_R1_00001: Cross-vendor alternative.

Application & sourcing insights

Questions & answers

BZX84C16LT1G is the closest alternative from the same manufacturer, offering an identical package and power rating but with a slightly higher 16V Zener voltage that requires review.