Nexperia USA Inc. PZU84-B47R

Overview

PZU84-B47R from Nexperia is a ±2 % tolerance Zener voltage regulator diode with nominal 47 V breakdown voltage, optimized for precision voltage reference and overvoltage protection in low-power analog circuits. It delivers 375 Ω differential resistance at 2 mA, 0.05 μA reverse current at 32.9 V, and operates across −55 °C to +150 °C ambient temperature in SOT23 package.

For engineers reviewing the PZU84-B47R datasheet, PZU84-B47R pinout, PZU84-B47R application, or PZU84-B47R equivalent, this page provides verified Zener parameters, terminal mapping, thermal resistance (330 K/W junction-to-solder-point), leakage behavior per AN90031, and direct-fit alternatives for 47 V regulation in power supply feedback paths and ESD clamp networks.

Technical Context

This Zener diode operates in reverse-bias breakdown mode to maintain stable 47 V reference under varying load and temperature conditions. Its hard breakdown knee and low dynamic impedance ensure minimal voltage deviation during transient current steps up to 200 mA forward or 40 W non-repetitive surge pulses.

Designed for surface-mount use on FR4 PCBs with standard 1.9 mm pitch, it leverages intentional minor leakage rise (per PZU84-B series) to reduce noise and improve switching response in clamping applications-distinct from C-series variants optimized for ultra-low leakage.

Key Specifications

Pinout & Package

Package: SOT23 plastic surface-mounted device, 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm lead pitch, 3-terminal configuration.

Key Features

Applications

Equivalent & Alternatives

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

Compared with PZU84-B47R, BZX84-C47 trades regulation precision and low impedance for lower cost, while PZU84-C47 prioritizes leakage over switching speed-making the B47R uniquely balanced for 47 V clamping where both accuracy and noise control matter.

Availability

PZU84-B47R is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and IoT sensor nodes requiring stable component supply with guaranteed long-term continuity.

Supply support for PZU84-B47R 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 delivering high-performance logic, discrete, and MOSFET solutions with focus on efficiency, reliability, and miniaturization.

The PZU84 series belongs to Nexperia's general-purpose Zener regulator portfolio, engineered specifically for precision voltage reference and robust overvoltage protection in space-constrained SMT applications.

FAQ

What is the maximum continuous reverse current the PZU84-B47R can sustain without exceeding its 250 mW power limit?

At 47 V Zener voltage, the absolute maximum continuous reverse current is 5.32 mA (250 mW ÷ 47 V). This assumes ambient temperature of 25 °C on a standard FR4 PCB; derating is required above 25 °C per the 500 K/W junction-to-ambient thermal resistance.

How does the "intentional minor rise of leakage current" in the PZU84-B series affect circuit noise compared to the C-series?

The controlled leakage increase in PZU84-B devices (like B47R) reduces shot noise and improves transient response during fast voltage transitions, as documented in Application Note AN90031-unlike C-series parts optimized for ultra-low leakage at the expense of switching speed and noise performance.

Can Pin 2 (n.c.) be grounded or tied to a signal without affecting PZU84-B47R operation?

No-Pin 2 is internally not connected and must remain electrically floating. Connecting it to ground, VCC, or any signal may cause unpredictable behavior or damage due to internal package parasitics; the datasheet explicitly defines it as "not connected" with no functional role.

Is the 40 W non-repetitive peak reverse power rating valid for arbitrary pulse widths, or only at 100 μs?

The 40 W rating applies strictly to 100 μs square-wave pulses with T_j = 25 °C prior to surge. For other durations, Fig. 1 shows the derated curve: e.g., 10 μs allows ~120 W, while 1 ms drops to ~12 W-designers must interpolate using the published P_ZSM vs. t_p graph.