Nexperia USA Inc. PZU84-C11-QR

Overview

PZU84-C11-QR from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOT23 package, rated for 11 V nominal breakdown (10.44–11.56 V), 250 mW total power dissipation, and qualified to AEC-Q101 for automotive use. It delivers hard breakdown knee, low leakage current (<0.1 µA at VR = 8 V), and differential resistance of 60 Ω at IZ = 5 mA - deployed in precision voltage reference and overvoltage protection circuits within engine control units.

For engineers reviewing the PZU84-C11-QR datasheet, PZU84-C11-QR pinout, PZU84-C11-QR application, or PZU84-C11-QR equivalent, this page provides verified Zener parameters, automotive-grade thermal performance (Tj ≤ 150 °C), SOT23 terminal mapping, and validated alternatives for 11 V regulation with tight tolerance and low dynamic impedance.

Technical Context

This Zener diode operates in reverse-bias breakdown mode with a specified nominal Zener voltage of 11 V and ±2 % tolerance, exhibiting a hard breakdown knee and very low leakage current (<0.1 µA at VR = 8 V). Its differential resistance is 60 Ω at IZ = 5 mA and 10 Ω at IZ = 0.5 mA, supporting stable regulation under light-load conditions.

Designed per AEC-Q101, it sustains junction temperatures up to 150 °C and handles non-repetitive peak reverse power surges up to 40 W (tp = 100 µs). Thermal resistance from junction to solder point is 330 K/W, enabling reliable operation on standard FR4 PCBs with single-sided 70 µm copper.

Key Specifications

Pinout & Package

SOT23 plastic surface-mounted package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch) with three terminals; pin 2 is internally not connected and must remain unconnected in layout.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C11,115 and MMSZ5240B-TP, PZU84-C11-QR uniquely combines AEC-Q101 qualification, ±2 % tolerance, and SOT23 footprint - making it the sole option for ASIL-B-compliant 11 V reference generation where leakage, dynamic impedance, and thermal robustness are design-critical.

Availability

PZU84-C11-QR is available at Aetrix Electronics and suitable for automotive engine control units, ADAS camera bias supplies, and body control module voltage monitors requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for PZU84-C11-QR 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 high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and energy-efficient solutions.

The PZU84-Q series belongs to Nexperia's AEC-Q101-qualified Zener regulator portfolio, engineered specifically for precision voltage reference and transient suppression in automotive power domains where stability, low leakage, and thermal resilience are mandatory.

FAQ

What is the maximum allowable junction temperature for continuous operation?

The absolute maximum junction temperature is 150 °C, validated per AEC-Q101 stress testing. Continuous operation at this limit requires thermal design ensuring Rth(j-a) ≤ 500 K/W on FR4 PCBs with standard footprint - typically achieved using localized copper pour under the cathode pad and minimizing adjacent heat sources.

Does pin 2 require PCB connection or grounding?

No - pin 2 is explicitly marked "n.c." (not connected) in the official Nexperia pinning diagram and has no internal bond wire. It must remain electrically and physically unconnected on the PCB; routing traces or applying solder paste to this pad risks mechanical stress and potential die damage during reflow.

How does the 60 Ω differential resistance impact regulation accuracy under load variation?

At IZ = 5 mA, 60 Ω rdif causes ≤30 mV output shift per 0.5 mA change in Zener current - critical for maintaining ADC reference stability in engine sensors. This value drops to 10 Ω at IZ = 0.5 mA, improving light-load regulation but requiring careful bias network design to avoid entering low-current instability zones.

Is PZU84-C11-QR suitable for bidirectional TVS applications?

No - it is a unidirectional Zener diode optimized for reverse-bias regulation, not symmetrical transient suppression. Its forward voltage (≤0.9 V) and lack of specified reverse standoff voltage make it unsuitable as a bidirectional TVS; dedicated automotive TVS arrays like PESD5V0S1BA should be used instead for ESD/ISO 10605 compliance.