Nexperia USA Inc. PZU84-B8V2R

Overview

PZU84-B8V2R from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOT23 package, providing precise 8.2 V regulation at 5 mA with 60 Ω differential resistance and 3.2 mV/K temperature coefficient. It delivers low leakage (0.5 μA at VR = 5 V), hard breakdown knee, and operates across −55 °C to +150 °C ambient for stable reference in power supply feedback loops.

For engineers reviewing the PZU84-B8V2R datasheet, PZU84-B8V2R pinout, PZU84-B8V2R application, or PZU84-B8V2R equivalent, this page details its regulation accuracy, thermal behavior, SOT23 terminal mapping, and verified alternatives for voltage reference and overvoltage protection circuits.

Technical Context

This Zener diode operates in reverse-biased breakdown mode to maintain a stable 8.2 V reference under varying load and temperature conditions. Its 60 Ω dynamic impedance at IZ = 5 mA ensures minimal output voltage deviation with current changes, while the 3.2 mV/K temperature coefficient enables predictable drift compensation in precision analog designs.

The device features a hard breakdown knee and very low leakage current (<0.5 μA at VR = 5 V), distinguishing it from the -C series optimized for switching noise reduction. It is rated for 250 mW steady-state dissipation on FR4 PCB and withstands 40 W non-repetitive surge pulses (tp = 100 μs).

Key Specifications

Pinout & Package

Supplied in SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch) with three terminals: anode (Pin 1), not connected (Pin 2), and cathode (Pin 3).

Key Features

Applications

Equivalent & Alternatives

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

Compared with PZU84-B8V2R, BZX84-C8V2 trades accuracy and knee sharpness for lower unit cost, while MMSZ5236B offers better rdif at the expense of package size and tolerance-making PZU84-B8V2R optimal for space-constrained, high-accuracy regulation.

Availability

PZU84-B8V2R is available at Aetrix Electronics and suitable for power supply feedback reference, overvoltage clamp protection, and low-power sensor biasing requiring stable component supply across industrial, instrumentation, and embedded control programs.

Supply support for PZU84-B8V2R 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 for industrial and automotive markets.

The PZU84 series belongs to Nexperia's general-purpose Zener regulator portfolio, engineered specifically for stable voltage reference and clamping in compact SMT designs where precision, low leakage, and thermal robustness are required.

FAQ

What is the maximum continuous forward current for PZU84-B8V2R?

The absolute maximum forward current is 200 mA per limiting values table. However, forward conduction is not its intended operating mode-designs must ensure reverse bias during regulation. Forward voltage is specified at 10 mA (VF ≤ 0.9 V), and sustained forward current above 100 mA risks thermal overstress due to limited 250 mW power dissipation capability.

Can PZU84-B8V2R replace a 7.5 V Zener in an existing design?

No-PZU84-B8V2R is a fixed 8.2 V Zener with ±2 % tolerance and cannot substitute a 7.5 V device without circuit recalibration. Its differential resistance, temperature coefficient, and leakage profile are optimized for 8.2 V operation; using it at mismatched voltages degrades regulation accuracy and may cause instability in feedback loops.

Is Pin 2 (n.c.) required to be grounded or left floating on PCB?

Pin 2 is internally not connected and must remain electrically unconnected-neither grounded nor tied to any net. Routing copper to this pad or applying solder paste risks unintended shorting or mechanical stress. The official SOT23 footprint (Fig. 10) shows no solder land for Pin 2, confirming its isolation.

How does the +3.2 mV/K temperature coefficient affect long-term stability in a 25–85 °C environment?

Over a 60 °C rise, the Zener voltage shifts by +192 mV (3.2 mV/K × 60 K), resulting in ~2.3 % drift from nominal 8.2 V. This is fully characterized and repeatable-enabling firmware-based compensation in closed-loop systems or selection of complementary TC components in reference dividers to achieve net zero drift.