Nexperia USA Inc. PZU22B3A,115

Overview

PZU22B3A,115 from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 22 V nominal working voltage, 320 mW total power dissipation at 25 °C ambient, and 40 W non-repetitive peak reverse power. It delivers low dynamic impedance (≤100 Ω at I_Z = 5 mA), reverse current ≤25 nA at I_Z = 0.5 mA, and temperature coefficient of +1.3 mV/K - used for precision voltage reference and overvoltage clamping in low-power analog front-ends.

For engineers reviewing the PZU22B3A,115 datasheet, PZU22B3A,115 pinout, PZU22B3A,115 application, or PZU22B3A,115 equivalent, key selection criteria include Zener voltage tolerance (±2 %), thermal resistance to solder point (255 K/W), differential resistance at 5 mA, reverse leakage at sub-mA bias, and SOD323 footprint compatibility with high-density PCB layouts.

Technical Context

This Zener diode operates in reverse breakdown mode with hard knee characteristics optimized for stable regulation under low-current conditions (IZ = 0.5–5 mA). Its ±2 % B3 tolerance grade ensures tight voltage control across temperature and production lots, supporting applications requiring repeatable clamping thresholds without trimming.

The device uses silicon planar technology in a plastic SOD323 package with cathode-marked anisotropic marking bar. Thermal design relies on junction-to-solder-point resistance (255 K/W) rather than junction-to-ambient (390 K/W), indicating performance is strongly dependent on PCB copper area under the cathode pad.

Key Specifications

Pinout & Package

SOD323 (SC-76) surface-mount plastic package: 1.7 mm × 1.25 mm × 0.95 mm body, 1.3 mm lead pitch, cathode marked by bar on top surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX384-B22,115, PZU22B3A,115 offers 4× lower leakage and tighter tolerance; versus MMSZ5247B-TP, it trades 180 mW lower power rating for 50 % smaller footprint and ±2 % accuracy - critical for miniaturized, battery-operated systems.

Availability

PZU22B3A,115 is available at Aetrix Electronics and suitable for precision voltage reference, overvoltage protection, and low-power sensor biasing requiring stable component supply across automotive infotainment subsystems, industrial process controllers, and medical wearable devices.

Supply support for PZU22B3A,115 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 components, with leadership in advanced packaging and automotive-qualified products.

The PZUxBA series targets general-purpose Zener regulation in space-constrained, low-power applications - designed specifically for surface-mounted precision reference and clamping where SOD323 footprint, ±2 % tolerance, and low leakage are mandatory.

FAQ

What is the maximum continuous reverse current for PZU22B3A,115 at 25 °C?

The device has no specified maximum continuous reverse current; instead, its DC operation is limited by total power dissipation (320 mW at T_amb ≤ 25 °C). At 22 V, this corresponds to I_Z ≤ 14.5 mA under ideal thermal conditions. Derating is required above 25 °C per the R_th(j-a) = 390 K/W curve.

Can PZU22B3A,115 be used in place of a 24 V Zener diode?

No - its nominal Zener voltage is 22 V with ±2 % tolerance (21.56–22.44 V), not 24 V. Substituting it for a 24 V part would result in premature conduction and incorrect regulation. For 24 V, use PZU24B3A,115, which has identical tolerance and package but 24 V nominal rating.

How does the +1.3 mV/K temperature coefficient affect circuit performance?

This positive coefficient means V_Z increases by 1.3 mV per Kelvin rise in junction temperature. In a 22 V reference, that's ~0.006 %/°C drift - beneficial when combined with negative-TC components (e.g., forward-biased diodes) to build temperature-stable references, but requires thermal isolation in high-precision metrology.

Is PZU22B3A,115 suitable for automotive applications?

No - the datasheet does not state automotive qualification. It is a general-purpose Zener diode intended for industrial, consumer, and computing applications. For automotive use, select Nexperia's AEC-Q200 qualified equivalents such as PZU22B3A-Q, which undergo extended temperature cycling and humidity testing.