Nexperia USA Inc. PZU84-C5V1-QR

Overview

PZU84-C5V1-QR from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOT23 package, rated for 5.1 V nominal breakdown voltage at 5 mA, with 250 mW total power dissipation and 250 Ω typical differential resistance at I_Z = 5 mA. It delivers hard breakdown knee, very low leakage current (<2 μA at V_R = 1.5 V), and AEC-Q101 qualification for automotive voltage reference and overvoltage protection circuits.

For engineers reviewing the PZU84-C5V1-QR datasheet, PZU84-C5V1-QR pinout, PZU84-C5V1-QR application, or PZU84-C5V1-QR equivalent, this device supports precision biasing in engine control units, infotainment power rails, and sensor signal conditioning where stable 5.1 V regulation under low-current conditions is required.

Technical Context

This Zener diode operates in reverse-bias breakdown mode to maintain a stable 5.1 V reference across its cathode–anode terminals. Its design emphasizes low dynamic impedance (250 Ω typ. at 5 mA) and minimal temperature coefficient (−2.7 mV/K at 5 mA), enabling accurate regulation in ambient temperatures from −55 °C to +150 °C.

The SOT23-3 package integrates a not-connected (n.c.) terminal (Pin 2), allowing layout flexibility while maintaining thermal performance: R_th(j-a) = 500 K/W in free air and R_th(j-sp) = 330 K/W to cathode solder point - critical for sustained operation in compact automotive PCBs.

Key Specifications

Pinout & Package

SOT23-3 plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch, tin-plated terminations compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C5V1,115 and MMSZ5231B-TP, PZU84-C5V1-QR uniquely combines AEC-Q101 qualification, ±2 % tolerance, and low-current optimization (250 Ω @ 5 mA) - making it the only option qualified for automotive 5.1 V reference duties requiring both precision and reliability at sub-10 mA operating points.

Availability

PZU84-C5V1-QR is available at Aetrix Electronics and suitable for automotive engine control units, infotainment power clamping, and sensor signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for PZU84-C5V1-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 efficiency technologies - delivering high-performance, reliable discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.

PZU84-Q series belongs to Nexperia's AEC-Q101-qualified Zener regulator portfolio, engineered specifically for automotive voltage reference and transient suppression where precision, low leakage, and thermal robustness are mandatory.

FAQ

What is the maximum reverse voltage (V_R) that PZU84-C5V1-QR can withstand before breakdown?

The device exhibits a nominal Zener voltage (V_Z) of 5.1 V at 5 mA test current, with guaranteed minimum and maximum values of 4.80 V and 5.40 V respectively. Breakdown occurs within this band - no separate "maximum reverse voltage" rating exists, as the diode is designed to operate continuously in controlled reverse conduction at V_Z.

Is Pin 2 truly unconnected, or does it serve a thermal or shielding function?

Pin 2 is electrically not connected (n.c.) per Nexperia's official pinning diagram and internal construction. It has no electrical or thermal function - its presence accommodates standardized SOT23-3 footprint compatibility and provides mechanical stability during reflow, but contributes zero to thermal resistance or EMI shielding.

How does the −2.7 mV/K temperature coefficient affect regulation accuracy over temperature?

At 5 mA, the temperature coefficient of −2.7 mV/K means V_Z decreases by 2.7 mV per Kelvin rise in junction temperature. Over a −40 °C to +125 °C ambient range (assuming typical T_j tracking), this yields ≈ −450 mV total drift - but combined with ±2 % initial tolerance and thermal resistance limits, actual system-level drift remains within ±30 mV for properly heatsinked layouts.

Can PZU84-C5V1-QR be used in place of a 5.0 V Zener like BZX84-C5V0?

No - PZU84-C5V1-QR is specified at 5.1 V nominal with ±2 % tolerance (4.80–5.40 V), whereas BZX84-C5V0 targets 5.0 V (4.75–5.25 V). The 100 mV nominal offset and tighter tolerance make direct substitution invalid in circuits relying on exact 5.0 V thresholds, such as comparator reference inputs or reset IC triggers calibrated for 5.0 V.