Nexperia USA Inc. PZU84-C9V1R

Overview

PZU84-C9V1R from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOT23 package, providing precise 9.1 V regulation at 5 mA with 6 Ω differential resistance and 3.8 mV/K temperature coefficient. It delivers low leakage (≤0.5 μA at VR = 6 V), hard breakdown knee, and 120 pF capacitance at 1 MHz - deployed in power supply reference and overvoltage protection circuits for industrial sensor modules.

For engineers reviewing the PZU84-C9V1R datasheet, PZU84-C9V1R pinout, PZU84-C9V1R application, or PZU84-C9V1R equivalent, key selection criteria include Zener voltage tolerance, dynamic impedance at low bias current, thermal coefficient stability across −55 °C to +150 °C, and SOT23 footprint compatibility with high-density PCB layouts.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain stable voltage under varying load and temperature conditions. Its design emphasizes low dynamic impedance (6 Ω at IZ = 5 mA) and tight ±2 % voltage tolerance, enabling accurate voltage referencing in analog front-ends and feedback loops.

The device features a hard breakdown knee and very low leakage current (<0.5 μA at VR = 6 V), distinguishing it from the PZU84-B series optimized for switching noise reduction. Thermal resistance from junction to ambient is 500 K/W on FR4 PCB, supporting operation up to 150 °C junction temperature.

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 and thermal performance on single-sided 70 μm copper FR4 PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C9V1 and MMSZ5240B, PZU84-C9V1R offers superior voltage accuracy (±2 % vs ±5 %), lower dynamic impedance (6 Ω vs ≥10 Ω), and tighter thermal coefficient control - making it optimal for high-stability references where SOT23 size and 250 mW dissipation are constraints.

Availability

PZU84-C9V1R is available at Aetrix Electronics and suitable for industrial sensor calibration, USB interface protection, FPGA power sequencing, and automotive body control modules requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for PZU84-C9V1R 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 mass-market electronics.

The PZU84 series belongs to Nexperia's general-purpose Zener regulator portfolio, engineered specifically for compact, high-accuracy voltage reference and clamping in space-constrained industrial and consumer applications.

FAQ

What is the maximum reverse voltage this Zener diode can withstand before breakdown?

The PZU84-C9V1R has a nominal Zener voltage of 9.1 V with a guaranteed range of 8.56 V to 9.55 V at 5 mA test current. Its absolute maximum reverse voltage is not defined independently - breakdown occurs within this specified VZ window. Sustained reverse bias beyond the rated non-repetitive peak power (40 W for 100 μs) risks permanent damage.

Can this device be used in place of a TL431 shunt regulator?

No - the PZU84-C9V1R is a two-terminal passive Zener diode without internal amplification or adjustable reference capability. It lacks the active feedback, programmable threshold, and sink-current drive of a TL431. It serves only as a fixed-voltage clamp or reference, not as a precision programmable shunt regulator.

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

Pin 2 is definitively not connected internally - the datasheet explicitly labels it "n.c." (not connected) in Table 2 and the simplified outline graphic. It carries no electrical function and must remain unconnected on the PCB. No thermal conduction path exists through this terminal; thermal dissipation relies solely on Pins 1 (anode) and 3 (cathode) and the PCB copper area.

How does the temperature coefficient affect regulation accuracy over −40 °C to +125 °C?

With a specified +3.8 mV/K coefficient at IZ = 5 mA, the Zener voltage shifts approximately +342 mV across an 90 K span (−40 °C to +125 °C), resulting in ~±1.9 % deviation from nominal 9.1 V. This drift is linear and predictable, allowing compensation in closed-loop systems but limiting open-loop accuracy in wide-temperature applications.