Is there a pin-compatible replacement for BZX84C15?

Yes, parts like BZX84C16 are pin-compatible in the SOT-23 package. However, they are not electrically identical due to different Zener voltages, so they are not 'drop-in' replacements without review.

What risks should I check before replacing BZX84C15?

The main risks are the different Zener voltage (e.g., 16V vs. 15V) and higher Zener impedance. These can alter your circuit's regulation point and stability, so they must be verified.

BZX84C15 Alternatives, Datasheet & Cross Reference | Yangjie Technology

Finding a substitute for the BZX84C15, a 15V SOT-23 Zener diode, involves matching its voltage, power, and package. Alternatives may have slight parametric differences requiring engineering review.

AI replacement insight

Electrical riskmedium

Zener voltage and impedance differ, requiring circuit validation.

Package risklow

SOT-23 is a standard, widely used package.

Sourcing risklow

The BZX84 series is common and available from multiple vendors.

Can it be replaced directly?

No direct, drop-in replacement was found. The BZX84C16 is a close parametric match, but its 16V Zener voltage (vs. 15V) must be verified for your application.

Best replacement path

The BZX84C16 is the closest alternative, offering a similar package and power rating but with a slightly higher 16V Zener voltage.

Main risk

The primary risk is the Zener voltage mismatch, which can affect the circuit's voltage regulation point.

Recommended alternatives

A SOT-23 Zener diode with slightly higher voltage (16V) and similar power rating, requiring circuit review.

View details

Alternative comparison matrix

Feature / factor	BZX84C15	BZX84C16	BZX84C18	Compatibility / risk
Package	SOT-23	SOT-23	SOT-23	SOT-23 — Package matches.; BZX84C18: Package matches.
Voltage	15V	16V	18V	16V / 18V — Slightly higher Zener voltage.; BZX84C18: Significantly higher Zener voltage.
Power	300mW	300mW	300mW	300mW — Power rating matches.; BZX84C18: Power rating matches.
Impedance	30Ω	40Ω	45Ω	40Ω / 45Ω — Higher impedance may affect regulation.; BZX84C18: Higher impedance may affect regulation.

Application & sourcing insights

Questions & answers

The BZX84C16 is the most promising alternative. It shares the SOT-23 package and power rating but has a 16V Zener voltage, which requires circuit validation.