Nexperia USA Inc. PZU84-C24-QR

Overview

PZU84-C24-QR from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOT23 package, rated for 24 V nominal breakdown (22.93–25.57 V), 120 Ω differential resistance at 5 mA, and 19 mV/K temperature coefficient; designed for precision voltage reference and overvoltage protection in automotive power rails.

For engineers reviewing the PZU84-C24-QR datasheet, PZU84-C24-QR pinout, PZU84-C24-QR application, or PZU84-C24-QR equivalent, key selection factors include its AEC-Q101 qualification, low leakage (<0.05 μA at VR = 19 V), hard breakdown knee, and thermal resistance of 330 K/W to solder point-critical for under-hood ECU voltage stabilization.

Technical Context

This Zener diode operates in reverse-bias breakdown mode with tightly controlled V_Z tolerance (±2 %) and exhibits a hard knee characteristic, minimizing regulation hysteresis during transient load shifts. Its differential resistance of 120 Ω at I_Z = 5 mA ensures stable output under moderate current variation.

Designed for automotive-grade reliability, it supports junction temperatures up to 150 °C and features intentional low leakage (<0.05 μA at VR = 19 V) per the PZU84-Cxx-Q series specification-optimized for low-power biasing and noise-sensitive analog references.

Key Specifications

Pinout & Package

Package: SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch), qualified per AEC-Q101 for automotive use.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C24,115 and MMSZ5245B-TP, PZU84-C24-QR delivers tighter tolerance, lower dynamic impedance, and verified automotive qualification-making it the sole option for AEC-compliant 24 V reference design where regulation stability and thermal robustness are mandatory.

Availability

PZU84-C24-QR is available at Aetrix Electronics and suitable for automotive ECU power management, industrial PLC input protection, and medical diagnostic equipment bias networks requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for PZU84-C24-QR 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 essential semiconductors, delivering high-performance, reliable components for automotive, industrial, and consumer markets.

The PZU84-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for precision voltage regulation and transient protection in harsh automotive environments.

FAQ

What is the maximum reverse voltage this diode can withstand before breakdown?

The PZU84-C24-QR has a nominal Zener voltage of 24 V with a guaranteed range of 22.93 V to 25.57 V at 5 mA test current. It does not have a distinct "maximum reverse voltage" rating-its function is to enter controlled breakdown at V_Z; operation above 25.57 V under regulation conditions risks exceeding its 250 mW power limit unless current is strictly limited by external series resistance.

Is Pin 2 electrically functional or a mechanical dummy lead?

Pin 2 is explicitly marked "n.c." (not connected) in Nexperia's official pinning documentation and internal die layout. It serves no electrical function and must remain unconnected on the PCB-no trace, pad, or thermal relief should be attached to it, as doing so may compromise mechanical integrity or thermal performance.

How does its temperature coefficient affect regulation accuracy over −40 °C to +125 °C?

With a specified +19 mV/K temperature coefficient at I_Z = 5 mA, V_Z increases by approximately 3.1 V across the full −40 °C to +125 °C junction range. This predictable linear drift enables system-level compensation in closed-loop regulators but requires derating for open-loop reference use above 85 °C ambient.

Can this diode replace older PZU84-B24-Q in existing designs?

No-PZU84-B24-Q belongs to the ±5 % tolerance series with higher leakage and softer breakdown knee, while PZU84-C24-QR is ±2 %, low-leakage, and hard-knee optimized. Substitution requires validation of circuit stability under tighter V_Z tolerance and reduced leakage, especially in low-current bias networks where B-series leakage could previously mask drift effects.