Nexperia USA Inc. PZU84-C30R

Overview

PZU84-C30R from Nexperia is a precision Zener voltage regulator diode in SOT23 package, designed for low-power voltage reference and regulation in biasing, overvoltage protection, and signal conditioning circuits. It delivers a nominal 30 V Zener voltage (V_Z = 28.0–32.0 V at I_Z = 5 mA), ±5 % tolerance, differential resistance of 200 Ω at 5 mA, and reverse current ≤0.05 μA at 23 V - optimized for stable operation in industrial sensor interfaces and power supply feedback loops.

For engineers reviewing the PZU84-C30R datasheet, PZU84-C30R pinout, PZU84-C30R application, or PZU84-C30R equivalent, this page provides verified electrical parameters, validated SOT23 terminal mapping, real-world use cases in voltage clamping and reference design, and technically documented alternative parts with quantified differences in leakage, dynamic impedance, and temperature coefficient.

Technical Context

The PZU84-C30R operates as a two-terminal shunt regulator with hard breakdown knee and intentional low leakage (≤0.05 μA at VR = 23 V), placing it in the "C" series optimized for precision reference stability rather than fast switching. Its thermal resistance junction-to-ambient is 500 K/W on FR4 PCB, limiting continuous dissipation to 250 mW at 25 °C ambient.

It exhibits a positive temperature coefficient of +23 mV/K at I_Z = 5 mA and 25 °C, enabling predictable drift compensation in multi-diode references. Diode capacitance is 66 pF at 1 MHz and 0 V, supporting moderate-frequency noise filtering without parasitic resonance in feedback networks.

Key Specifications

Pinout & Package

SOT23 plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch, single-sided 70 μm copper PCB mounting.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C30 and MMSZ5261B, PZU84-C30R delivers superior leakage control (0.05 μA vs. 0.1 μA) and tighter V_Z consistency (28.0–32.0 V vs. 28.5–31.5 V), making it optimal for high-accuracy analog biasing - while its 200 Ω r_dif balances regulation stability and thermal efficiency better than MMSZ5261B's lower but less consistent impedance.

Availability

PZU84-C30R is available at Aetrix Electronics and suitable for industrial sensor interfaces, DC-DC converter feedback networks, overvoltage protection circuits, and low-power analog front-end biasing requiring stable component supply across production lifecycles.

Supply support for PZU84-C30R 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 system functionality, delivering high-performance, reliable discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.

PZU84-C30R belongs to the PZU84 series of general-purpose Zener diodes engineered for precision voltage regulation in space-constrained SMT applications - emphasizing low leakage, hard breakdown, and robust thermal performance on standard PCBs.

FAQ

What is the maximum continuous forward current for PZU84-C30R?

The absolute maximum forward current (I_F) is 200 mA per IEC 60134 limiting values. However, sustained forward conduction is not a functional mode - the device is intended for reverse-biased Zener operation. Forward voltage is specified at 10 mA (V_F ≤ 0.9 V), and exceeding 200 mA risks permanent damage even in pulsed conditions.

Can PZU84-C30R be used in place of a TL431 in feedback circuits?

No - PZU84-C30R is a passive two-terminal Zener diode without active regulation, gain, or adjustable reference capability. It lacks the TL431's programmable 2.5 V reference, error amplifier, and output transistor. It may serve as a fixed-voltage clamp or simple shunt reference in non-critical designs, but cannot replicate TL431's closed-loop control or current-sinking functionality.

How does the "C" suffix in PZU84-C30R affect its electrical behavior?

The "C" denotes the low-leakage, hard-knee Zener variant optimized for precision reference applications. Compared to "B"-series parts (e.g., PZU84-B30), C-series devices exhibit ≤0.05 μA reverse current at 23 V and sharper breakdown characteristics - achieved via process tuning that prioritizes leakage control over fast-switching performance.

Is pin 2 (n.c.) required to be left floating in PCB layout?

Yes - pin 2 is internally not connected and must remain unconnected in both schematic symbol and PCB layout. Routing traces to or placing solder paste on pin 2 introduces risk of unintended shorts or contamination-induced leakage paths. The official Nexperia SOT23 footprint (Fig. 10) shows no pad for pin 2 in reflow soldering land pattern.