Is there a pin-compatible replacement for PDZ5.1B,115?

Yes, other Zener diodes in the SOD-323 (SC-76) package are pin-compatible. However, you must verify the Zener voltage (Vz) is 5.1V and the power rating is at least 400mW to ensure functional equivalence.

What risks should I check before replacing PDZ5.1B,115?

Key risks include using a part with the wrong Zener voltage, which will fail to regulate correctly. Also, check for lower power ratings, which can lead to overheating, and different voltage tolerance, which can affect circuit precision.

PDZ5.1B,115 Alternatives, Datasheet & Cross Reference | Nexperia USA Inc.

PDZ5.1B,115 is a popular 5.1V, 400mW Zener diode from Nexperia in a compact SOD-323 package. Finding a substitute requires matching the Zener voltage, power rating, and package for direct compatibility.

AI replacement insight

Electrical riskhigh

Candidates have incorrect Zener voltage, making them functionally incompatible for the same regulation point.

Package risklow

Several alternatives exist in the same SOD-323 package, ensuring physical compatibility.

Sourcing risklow

The target part is Active and widely available from its manufacturer.

Can it be replaced directly?

No direct drop-in replacement was found among the candidates reviewed. All candidates had significant electrical differences, primarily in Zener voltage.

Best replacement path

Find a Zener diode with Vz=5.1V, Power>=400mW, and SOD-323 package.

Main risk

The primary risk is electrical mismatch, specifically using a diode with a Zener voltage other than 5.1V, which will cause circuit malfunction.

Recommended alternatives

A functional alternative in the same package and power rating, but with a different Zener voltage of 8.2V.

View details

Alternative comparison matrix

Feature / factor	PDZ5.1B,115	PDZ8.2B,115	BZX384-B10,115	Compatibility / risk
Package	SC-76, SOD-323	SC-76, SOD-323	SC-76, SOD-323	SC-76, SOD-323 — Package is physically compatible.; BZX384-B10,115: Package is physically compatible.
Voltage	5.1 V	8.2 V	10 V	8.2 V / 10 V — Zener voltage is not equivalent.; BZX384-B10,115: Zener voltage is not equivalent.
Power	400 mW	400 mW	300 mW	400 mW / 300 mW — Power rating is sufficient.; BZX384-B10,115: Power rating is lower than target.
Tolerance	±2%	±2%	±2%	±2% — Voltage tolerance matches.; BZX384-B10,115: Voltage tolerance matches.

Application & sourcing insights

Questions & answers

A direct replacement for PDZ5.1B,115 must match its 5.1V Zener voltage, ±2% tolerance, 400mW power rating, and SOD-323 package. Other parts in the Nexperia PDZ series with different voltages are not direct substitutes.