Nexperia USA Inc. PZU3.0BA,115

Overview

PZU3.0BA,115 from Nexperia is a general-purpose Zener voltage regulator diode in SOD323 (SC-76) package, designed for precision voltage reference and overvoltage protection in low-power analog circuits. It delivers a nominal 3.0 V Zener voltage with ±5 % tolerance (B series), 95 Ω maximum differential resistance at I_Z = 5 mA, ≤10 µA reverse current at I_Z = 0.5 mA, and operates up to 150 °C junction temperature - enabling stable regulation in compact power management stages of sensor interfaces and microcontroller supply rails.

For engineers reviewing the PZU3.0BA,115 datasheet, PZU3.0BA,115 pinout, PZU3.0BA,115 application, or PZU3.0BA,115 equivalent, key selection criteria include its tight 3.0 V regulation window, low dynamic impedance at low bias currents, hard breakdown knee for predictable clamping, and compatibility with standard FR4 PCB reflow footprints per JEDEC SOD323 outline.

Technical Context

This Zener diode operates in reverse-biased breakdown mode to maintain a stable reference voltage across its terminals under varying load and input conditions. Its design emphasizes low leakage (≤10 µA at 0.5 mA test current) and sharp knee characteristics, minimizing regulation error in low-current bias networks.

The device exhibits a negative temperature coefficient of −2.1 mV/K at T_j = 25 °C, consistent with low-voltage Zeners below 5 V, and achieves thermal resistance of 255 K/W from junction to solder point when mounted on a standard FR4 PCB with tin-plated copper.

Key Specifications

Pinout & Package

SOD323 (SC-76) surface-mount plastic package with two terminals: cathode marked by a bar on the top surface, anode unmarked. Designed for reflow soldering on standard FR4 PCBs with defined footprint per Figure 10 (0.5 mm × 0.6 mm solder lands).

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX384-B3V0,115 and MMSZ4684T1G, PZU3.0BA,115 offers superior low-current regulation (95 Ω r_dif, 10 µA IR) in the smallest SOD323 footprint, making it optimal for space- and power-constrained reference and clamp functions where precision at microamp bias levels matters.

Availability

PZU3.0BA,115 is available at Aetrix Electronics and suitable for power supply rail clamping, microcontroller reference dividers, sensor signal conditioning, and low-power voltage monitors requiring stable component supply across high-mix production runs and prototyping cycles.

Supply support for PZU3.0BA,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 delivering high-performance, reliable discrete, logic, and MOSFET devices optimized for efficiency-critical applications in automotive, industrial, and consumer electronics.

The PZUxBA series belongs to Nexperia's general-purpose Zener regulator portfolio, engineered specifically for stable voltage reference and overvoltage protection in compact, surface-mounted power management circuits.

FAQ

What is the maximum continuous reverse current the PZU3.0BA,115 can sustain without exceeding its 320 mW power limit?

At 3.0 V Zener voltage, the absolute maximum continuous reverse current is 106 mA (320 mW ÷ 3.0 V), assuming ambient temperature ≤25 °C and standard FR4 PCB mounting. Derating applies above 25 °C per the 255 K/W junction-to-solder-point thermal resistance - e.g., at 70 °C ambient, max continuous current drops to ~75 mA to maintain T_j ≤150 °C.

How does the −2.1 mV/K temperature coefficient affect voltage regulation accuracy over a −40 °C to +125 °C range?

Over that 165 K span, the total Zener voltage drift is approximately −347 mV (−2.1 mV/K × 165 K), shifting the nominal 3.0 V rating to ~2.65 V at +125 °C. This drift is predictable and linear, allowing compensation in systems where absolute accuracy is critical - for example, by pairing with a positive-TC component or calibrating at two temperatures.

Can PZU3.0BA,115 be used in forward-bias mode as a standard silicon diode?

Yes - its forward voltage is 0.9 V at 10 mA and 1.1 V at 100 mA (pulse-tested), matching typical silicon diode behavior. However, it is not optimized for forward conduction: no specified IF(max) rating beyond 200 mA limiting value, and no guaranteed soft recovery or switching speed. Use only for low-frequency, low-current rectification where Zener functionality is secondary.

Is the SOD323 footprint of PZU3.0BA,115 compatible with automated optical inspection (AOI) and X-ray inspection systems?

Yes - the SOD323 package has standardized dimensions (1.7 mm × 1.25 mm body, 1.3 mm pitch) and visible cathode marking bar, meeting IPC-A-610 Class 2/3 visual inspection criteria. Its low profile (0.95 mm height) and symmetric pad layout support reliable AOI detection of solder joint quality, tombstoning, and polarity orientation in high-volume SMT lines.