Nexperia USA Inc. PZU84-B15-QR

Overview

PZU84-B15-QR from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOT23 package, rated for 15 V nominal breakdown voltage (14.34 V min / 15.52 V max), 250 mW total power dissipation, and qualified to AEC-Q101 for automotive use. It delivers hard breakdown knee, very low leakage current (<0.05 μA at VR = 11 V), and differential resistance of 80 Ω at IZ = 5 mA - enabling precision voltage reference and overvoltage protection in compact DC-DC feedback paths.

For engineers reviewing the PZU84-B15-QR datasheet, PZU84-B15-QR pinout, PZU84-B15-QR application, or PZU84-B15-QR equivalent, this page provides verified Zener parameters including VZ tolerance, rdif, SZ temperature coefficient, IR leakage, and thermal resistance - all confirmed from Nexperia's Rev. 4 product data sheet dated 16 August 2024.

Technical Context

This Zener diode operates in reverse-bias breakdown mode to maintain stable reference voltage under varying load and temperature conditions. Its 15 V nominal working voltage falls within the PZU84-B series' optimized segment for low dynamic impedance and minimal leakage - distinct from the C-series' intentional leakage rise for noise reduction.

The device features a hard breakdown knee with typical differential resistance of 80 Ω at 5 mA and temperature coefficient of +9.2 mV/K at 5 mA, supporting stable regulation across −55 °C to +150 °C ambient range. Junction-to-ambient thermal resistance is 500 K/W on standard FR4 PCB, limiting continuous power handling without derating.

Key Specifications

Pinout & Package

Package: SOT23 plastic surface-mount package; 3-terminal, 1.9 mm pitch, 2.9 mm × 1.3 mm × 1 mm body; anode (Pin 1), not connected (Pin 2), cathode (Pin 3).

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C15 and MMSZ5245B, PZU84-B15-QR offers superior V_Z stability (±2 % vs. ±5 %), guaranteed automotive qualification, and lower leakage - making it the only option suitable for ASIL-compliant systems where reference accuracy and long-term reliability are non-negotiable.

Availability

PZU84-B15-QR is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and consumer power adapter designs requiring stable component supply, AEC-Q101 compliance, and tight Zener voltage tolerance.

Supply support for PZU84-B15-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.

PZU84-Q series belongs to Nexperia's AEC-Q101-qualified Zener portfolio designed specifically for precision voltage reference and overvoltage protection in harsh-environment automotive ECUs and industrial control units.

FAQ

What is the maximum reverse current (I_R) specification for PZU84-B15-QR at 11 V?

The maximum reverse current is 0.05 μA at V_R = 11 V and T_j = 25 °C, as specified in Table 8 of the Nexperia PZU84-Q series datasheet Rev. 4. This ultra-low leakage is characteristic of the B-series devices and critical for battery-powered applications where standby current must be minimized.

Is Pin 2 electrically connected internally in the SOT23 package?

No, Pin 2 is explicitly marked "n.c." (not connected) in Table 2 of the datasheet and has no internal bond wire or die connection. It must remain unconnected on the PCB - neither routed nor soldered - to avoid mechanical stress or unintended parasitic coupling.

How does the temperature coefficient (S_Z) of PZU84-B15-QR affect its regulation accuracy over temperature?

With S_Z = +9.2 mV/K at I_Z = 5 mA, the Zener voltage increases by approximately 0.92 V over a 100 K rise (e.g., −40 °C to +60 °C). Combined with ±2 % initial tolerance, total V_Z variation remains within ±3.1 % across that range - verified in Figure 7 of the datasheet for 15 V types.

Can PZU84-B15-QR be used in place of a 1N4744A in an existing design?

No - while both are 15 V Zeners, PZU84-B15-QR is a 250 mW SOT23 device with ±2 % tolerance and AEC-Q101 qualification, whereas 1N4744A is a 1 W through-hole part with ±5 % tolerance and no automotive qualification. Direct substitution requires verifying thermal layout, footprint compatibility, and system-level qualification requirements.