Nexperia USA Inc. PZU84-B36-QR

Overview

PZU84-B36-QR from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOT23 package, rated for 36 V nominal breakdown voltage (34.0–38.0 V), 250 mW total power dissipation, and qualified to AEC-Q101 for automotive use. It delivers low dynamic impedance (300 Ω at I_Z = 5 mA) and ultra-low leakage current (≤0.05 μA at V_R = 27 V), enabling precision voltage reference in engine control unit (ECU) bias networks.

For engineers reviewing the PZU84-B36-QR datasheet, PZU84-B36-QR pinout, PZU84-B36-QR application, or PZU84-B36-QR equivalent, key selection criteria include its AEC-Q101 qualification, tight 36 V Zener tolerance, SOT23 thermal resistance (R_th(j-a) = 500 K/W), and hard breakdown knee for stable regulation under transient load conditions.

Technical Context

This Zener diode operates in reverse-biased avalanche mode with a specified working voltage of 36 V at I_Z = 5 mA and exhibits a temperature coefficient of +27 mV/K - indicating positive drift over temperature. Its differential resistance remains stable at 300 Ω under nominal test current, supporting consistent regulation across ambient temperatures from −55 °C to +150 °C.

The device features intentional low leakage (≤0.05 μA at 27 V) and optimized capacitance (59 pF at 1 MHz, V_R = 0 V), making it suitable for noise-sensitive analog reference rails. Its non-repetitive peak reverse power capability reaches 40 W for 100 μs pulses, enabling robust surge handling in automotive 12 V/24 V supply domains.

Key Specifications

Pinout & Package

SOT23 plastic surface-mounted package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch); thermally optimized for FR4 PCB mounting with single-sided 70 μm copper.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C36-TP and MMSZ5241B-TP, PZU84-B36-QR offers tighter tolerance, lower dynamic impedance, AEC-Q101 certification, and superior surge immunity - making it the sole choice for automotive-grade 36 V reference design where long-term stability and regulatory compliance are mandatory.

Availability

PZU84-B36-QR is available at Aetrix Electronics and suitable for engine control units, body control modules, and ADAS camera power sequencing requiring stable component supply across automotive production lifecycles.

Supply support for PZU84-B36-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 high-volume, high-reliability logic, discrete, and MOSFET solutions, with leadership in automotive-qualified components.

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

FAQ

What is the maximum reverse voltage this Zener can regulate continuously?

The PZU84-B36-QR is rated for continuous regulation at its nominal Zener voltage of 36 V (34.0–38.0 V range) with a maximum total power dissipation of 250 mW at 25 °C ambient. At elevated temperatures, derating applies per R_th(j-a) = 500 K/W - e.g., at 100 °C ambient, maximum continuous power drops to ~125 mW, limiting sustained current to ~3.5 mA.

Does Pin 2 require PCB connection or grounding?

No - Pin 2 is explicitly marked "n.c." (not connected) in the official Nexperia datasheet and internal die construction. It must remain electrically floating and unconnected on the PCB; soldering or routing to ground or any net will compromise device functionality and may cause measurement anomalies or thermal imbalance.

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

With a specified +27 mV/K temperature coefficient, the Zener voltage increases by approximately 4.3 V across a 160 K range (−40 °C to +125 °C). This results in a worst-case shift from ~34.5 V to ~38.8 V - still within the 34.0–38.0 V min/max spec at 25 °C, confirming full-range compliance for automotive under-hood operation.

Can this part replace older PZU84-B36-Q devices in existing designs?

Yes - PZU84-B36-QR is a direct replacement for PZU84-B36-Q, sharing identical electrical specs, SOT23 footprint, pinout, and AEC-Q101 qualification. The "-QR" suffix denotes tape-and-reel packaging per EIA-481 standard; no performance or reliability differences exist between Q and QR variants.