Nexperia USA Inc. PZU14B2AF

Overview

PZU14B2AF from Nexperia is a precision Zener voltage regulator diode in SOD323 (SC-76) package, rated for 14 V nominal Zener voltage with ±2 % tolerance (B2 series), 80 Ω maximum differential resistance at I_Z = 5 mA, and 10 nA reverse current at I_Z = 0.5 mA - designed for low-noise voltage reference and overvoltage clamping in space-constrained power management circuits.

For engineers reviewing the PZU14B2AF datasheet, PZU14B2AF pinout, PZU14B2AF application, or PZU14B2AF equivalent, this device is selected for stable 14 V regulation in battery-powered sensors, USB-C PD auxiliary rails, and analog front-end biasing where tight voltage tolerance, low leakage, and fast transient response are critical.

Technical Context

This Zener diode operates in reverse breakdown mode with a hard knee and intentional minor leakage rise optimized for fast switching and noise reduction per AN90031. Its temperature coefficient is +2 mV/K at I_Z = 5 mA, enabling predictable drift compensation in mid-voltage references.

Thermal resistance from junction to solder point is 55 K/W, and total power dissipation is rated at 320 mW on FR4 PCB with standard footprint - supporting continuous regulation under ambient temperatures from –55 °C to +150 °C.

Key Specifications

Pinout & Package

SOD323 (SC-76) plastic surface-mount package with cathode marked by a bar on the body; compact 1.3 mm lead pitch supports high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX384-B14 and MMSZ4687, PZU14B2AF delivers superior regulation precision (±2 % vs ±5 %), lower dynamic impedance (80 Ω vs ≥100 Ω), and significantly reduced leakage (10 nA vs ≥50 nA), making it optimal for high-accuracy, low-power, and space-constrained applications.

Availability

PZU14B2AF is available at Aetrix Electronics and suitable for USB-C PD auxiliary rails, industrial sensor bias references, and IoT edge node overvoltage protection requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for PZU14B2AF 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 efficiency technologies, delivering high-performance, reliable discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.

PZUxBA series belongs to Nexperia's general-purpose Zener regulator portfolio, engineered specifically for high-precision, low-leakage voltage reference and clamping in miniaturized SMD power systems.

FAQ

What is the maximum continuous reverse current the PZU14B2AF can sustain without exceeding its power rating?

At 25 °C ambient on a standard FR4 PCB, PZU14B2AF sustains up to 22.9 mA continuously (320 mW ÷ 14 V) before reaching its 320 mW total power dissipation limit. Derating applies above 25 °C per the R_th(j-a) = 390 K/W curve - e.g., at 70 °C ambient, max continuous I_Z drops to ~15.5 mA.

How does the B2 tolerance series differ electrically from the B1 or B3 variants in the same voltage grade?

PZU14B2AF specifies a ±2 % tolerance band (13.7–14.3 V), identical to B1 and B3 in accuracy. The distinction lies in marking code (VU per Table 4) and batch-level process targeting - all three meet the same V_Z, r_dif, and I_R specs at 5 mA, with no functional difference in circuit behavior.

Can PZU14B2AF be used in series or parallel configurations for higher voltage or current handling?

No - Zener diodes exhibit manufacturing spread in V_Z and temperature coefficient; series connection causes unequal voltage sharing, and parallel connection leads to thermal runaway. For >14 V regulation, use a single higher-voltage Zener (e.g., PZU15B2A); for >22.9 mA, add an external series pass transistor.

Is the 101 pF capacitance value measured at zero bias applicable to AC-coupled signal path designs?

Yes - the 101 pF diode capacitance is specified at f = 1 MHz and V_R = 0 V, representing the maximum junction capacitance in unbiased or lightly reverse-biased conditions. In AC-coupled clamping, this value directly impacts high-frequency roll-off and should be included in impedance calculations at target operating frequencies.