Nexperia USA Inc. PZU24B2A,115

Overview

PZU24B2A,115 from Nexperia is a precision Zener voltage regulator diode in SOD323 (SC-76) package, designed for stable 24 V reference and overvoltage clamping in low-power analog circuits. It delivers ±2 % tolerance (B2 series), 120 Ω max differential resistance at I_Z = 5 mA, 30 nA reverse current at I_Z = 0.5 mA, and operates up to 150 °C junction temperature - ideal for industrial sensor signal conditioning and power rail protection.

For engineers reviewing the PZU24B2A,115 datasheet, PZU24B2A,115 pinout, PZU24B2A,115 application, or PZU24B2A,115 equivalent, key selection criteria include its tight 24.0 V nominal Zener voltage with ±2 % tolerance, low 120 Ω dynamic impedance enabling stable regulation under varying load, minimal 30 nA leakage at sub-mA bias, and SOD323 footprint compatibility with high-density PCB layouts.

Technical Context

This device functions as a two-terminal shunt voltage reference, maintaining a stable 24 V output by conducting reverse current when input exceeds V_Z. Its B2 tolerance grade ensures tighter regulation than standard ±5 % Zeners, and intentional minor leakage rise improves switching speed and noise immunity per AN90031.

Thermal resistance from junction to solder point is 55 K/W, supporting reliable operation on FR4 PCBs with standard cathode pad layout. The 24 V working voltage places it in the positive temperature coefficient region (+1.3 mV/K), minimizing drift across temperature in precision bias networks.

Key Specifications

Pinout & Package

Package: SOD323 (SC-76), surface-mount plastic case measuring 1.7 mm × 1.25 mm × 0.95 mm with 1.3 mm lead pitch. Cathode marked by bar on top surface.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener voltage regulation applications.

Compared with BZX84-C24 and MMSZ5242B, PZU24B2A,115 offers superior accuracy and leakage performance in the smallest footprint, making it optimal for space-constrained, high-stability 24 V reference applications where ±2 % tolerance and sub-50 nA leakage are design requirements.

Availability

PZU24B2A,115 is available at Aetrix Electronics and suitable for industrial sensor biasing, PLC I/O protection, microcontroller reset clamping, and DC-DC feedback referencing requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for PZU24B2A,115 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, serving automotive, industrial, and consumer markets with robust, scalable solutions.

PZUxBA series belongs to Nexperia's general-purpose Zener regulator portfolio, engineered specifically for stable voltage reference and overvoltage protection in compact, surface-mounted industrial electronics with emphasis on tight tolerance, low leakage, and thermal resilience.

FAQ

What is the maximum non-repetitive peak reverse current for PZU24B2A,115?

The maximum non-repetitive peak reverse current is 19 A, measured under 100 µs square-wave pulse conditions with junction temperature at 25 °C prior to surge. This value is derived from the 40 W non-repetitive peak power rating and the 24 V nominal Zener voltage (I_ZSM = P_ZSM/V_Z ≈ 40 W / 24 V ≈ 19 A), as confirmed in Table 8 of the datasheet.

How does the +1.3 mV/K temperature coefficient affect circuit performance?

The +1.3 mV/K coefficient means V_Z increases by 1.3 mV per degree Celsius rise in junction temperature. In a 24 V reference, this results in ~31 mV drift over a 25–100 °C operating range. Designers can compensate by pairing with negative-tempco components or selecting operating points where drift cancels system-level thermal errors.

Can PZU24B2A,115 be used in place of a TL431 in feedback circuits?

Yes, but with functional trade-offs: PZU24B2A,115 provides fixed 24 V reference without adjustable feedback, lacks built-in error amplifier or current sink capability, and requires external current limiting. It serves best as a simple, low-quiescent replacement where fixed voltage and minimal board area are priorities over programmability.

What is the thermal resistance from junction to solder point, and why does it matter?

R_th(j-sp) is 55 K/W, measured from junction to cathode solder point on an FR4 PCB with 1 cm² cathode pad. This low value enables efficient heat transfer into the PCB copper, allowing sustained 320 mW dissipation without exceeding 150 °C junction temperature - critical for reliability in enclosed industrial enclosures with limited airflow.