Nexperia USA Inc. PZU84-B14R

Overview

PZU84-B14R from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOT23 package, rated for 14 V nominal breakdown voltage at I_Z = 5 mA, with differential resistance of 80 Ω and temperature coefficient of +8.0 mV/K, used for precision voltage reference and overvoltage protection in low-power analog circuits.

For engineers reviewing the PZU84-B14R datasheet, PZU84-B14R pinout, PZU84-B14R application, or PZU84-B14R equivalent, key selection criteria include Zener voltage tolerance, dynamic impedance at low bias current, thermal resistance to ambient (500 K/W), leakage behavior under reverse bias, and compatibility with FR4 PCB reflow soldering footprints.

Technical Context

This Zener diode operates in reverse breakdown mode with hard knee characteristics optimized for stable reference generation at low currents (IZ = 0.5 mA to 5 mA). Its ±2 % tolerance and 80 Ω differential resistance at 5 mA support tight regulation in battery-powered sensor interfaces and feedback networks.

The device exhibits a positive temperature coefficient of +8.0 mV/K across its operating range and is characterized for junction temperatures up to 150 °C. It features intentional low leakage (<0.1 μA at VR = 11 V) and low capacitance (101 pF at f = 1 MHz, VR = 0 V), enabling use in noise-sensitive analog signal conditioning.

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), optimized for automated assembly on FR4 PCBs with standard reflow footprint per Figure 10.

Key Features

Applications

Equivalent & Alternatives

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

Compared with PZU84-B14R, BZX84-C15 trades 1 V higher nominal voltage and ±5 % tolerance for broader availability, while MMSZ4687 offers higher power handling at the cost of reduced voltage accuracy and different thermal profile-both require revalidation of bias current and PCB thermal layout.

Availability

PZU84-B14R is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, USB-C port overvoltage clamp, and low-power IoT node voltage monitor applications requiring stable component supply, consistent parametric performance, and long-term obsolescence management.

Supply support for PZU84-B14R 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, reliable discrete, logic, and MOSFET devices with focus on efficiency, miniaturization, and robustness for high-volume electronics.

The PZU84 series belongs to Nexperia's general-purpose Zener regulator portfolio, engineered for stable voltage reference and overvoltage protection in space-constrained, low-power applications across industrial and consumer systems.

FAQ

What is the maximum continuous reverse current for reliable operation of PZU84-B14R?

The device supports up to 17.9 mA continuous reverse current (IZ) at 25 °C ambient, calculated from its 250 mW total power dissipation rating and 14 V Zener voltage. Derating is required above 25 °C per the 500 K/W thermal resistance; at 70 °C ambient, maximum IZ drops to ~12.5 mA to maintain Tj ≤ 150 °C.

Does PZU84-B14R require a series current-limiting resistor in all applications?

Yes-a series resistor is mandatory to limit reverse current and prevent thermal runaway. For example, with a 16 V supply and target IZ = 5 mA, a 400 Ω resistor sets safe bias; values must be recalculated for worst-case supply tolerance, temperature drift, and load transients to ensure IZ stays within 0.5–15 mA recommended operating range.

How does the "B" suffix in PZU84-B14R affect its electrical behavior versus "C" variants?

The "B" suffix denotes the tighter ±2 % Zener voltage tolerance grade and optimized low-leakage, hard-knee breakdown profile. In contrast, "C" variants (e.g., PZU84-C14) offer ±5 % tolerance and slightly higher leakage-designed for fast-switching noise reduction per AN90031-not applicable to PZU84-B14R's precision reference role.

Can PZU84-B14R be used in place of a 14 V Zener in an existing SOT23 footprint?

Yes-PZU84-B14R uses standard SOT23 pinning (Anode–n.c.–Cathode) and matches IPC-7351B footprint recommendations. Its 2.9 mm × 1.3 mm body and 1.9 mm pin pitch align with common reflow land patterns; verify solder mask clearance and copper pour isolation per Nexperia's Figure 10 layout guidance to ensure manufacturability.