Nexperia USA Inc. PZU11B1A,115

Overview

PZU11B1A,115 from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 11 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 (60 Ω max at I_Z = 5 mA), 10 nA reverse current at I_Z = 0.5 mA, and operates in industrial temperature range (−55 °C to +150 °C), commonly used for precision voltage reference and overvoltage clamping in power supply feedback loops.

For engineers reviewing the PZU11B1A,115 datasheet, PZU11B1A,115 pinout, PZU11B1A,115 application, or PZU11B1A,115 equivalent, key selection criteria include its ±2 % voltage tolerance, low leakage at sub-mA bias, hard breakdown knee, and thermal resistance of 255 K/W (junction-to-solder point) on standard FR4 PCB - critical for stable regulation in space-constrained DC-DC converters and sensor interface circuits.

Technical Context

This Zener diode operates in reverse-bias breakdown mode with a specified nominal Zener voltage of 11 V at 5 mA test current, exhibiting a temperature coefficient of +7.4 mV/K and differential resistance ≤60 Ω. Its design targets stable regulation under low-current conditions (0.5–5 mA), with intentional minor leakage rise optimized for fast switching and noise reduction per AN90031.

The device uses silicon planar technology in a plastic SOD323 package, enabling surface-mount compatibility and thermal performance defined by R_th(j-sp) = 255 K/W (cathode solder point) and R_th(j-a) = 390 K/W (free air). It supports non-repetitive surge handling up to 40 W for 100 µs square-wave pulses at T_j = 25 °C prior to surge.

Key Specifications

Pinout & Package

The PZU11B1A,115 is housed in a SOD323 (SC-76) plastic surface-mount package measuring 1.7 mm × 1.25 mm × 0.95 mm with 1.3 mm lead pitch. The cathode is marked by a bar on the device body.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C11,215 and MMSZ5240B-7-F, PZU11B1A,115 uniquely balances ±2 % precision, SOD323 miniaturization, and 40 W surge capability - making it optimal for space-constrained, high-stability regulation where leakage and knee sharpness directly impact system accuracy.

Availability

PZU11B1A,115 is available at Aetrix Electronics and suitable for power supply feedback regulation, overvoltage clamp protection, and reference voltage source applications requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.

Supply support for PZU11B1A,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 solutions with focus on efficiency, miniaturization, and robustness.

The PZUxBA series belongs to Nexperia's general-purpose Zener regulator portfolio, engineered specifically for precision voltage reference and transient clamping in compact, high-density surface-mount designs across industrial and consumer power systems.

FAQ

What is the maximum continuous reverse current the PZU11B1A,115 can sustain at 25 °C ambient?

The device supports a maximum forward current of 200 mA, but for Zener operation, continuous reverse current is limited by power dissipation: at 25 °C ambient on FR4 PCB, P_tot = 320 mW implies I_Z ≤ 29 mA (320 mW ÷ 11 V). Derating applies above 25 °C per thermal resistance data.

How does the ±2 % tolerance of PZU11B1A,115 compare to standard ±5 % Zeners in practical regulation accuracy?

At 11 V nominal, ±2 % yields ±0.22 V tolerance versus ±0.55 V for ±5 %. In a 12 V supply feedback divider, this reduces output voltage uncertainty from ±5.5 % to ±2.2 %, significantly lowering calibration overhead and improving cross-unit consistency in production.

Can PZU11B1A,115 be used in place of a TL431 for basic voltage reference functions?

No - TL431 is an adjustable shunt regulator with active feedback, while PZU11B1A,115 is a passive two-terminal Zener. It can replace TL431 only in fixed-voltage, low-current (<5 mA) reference roles where gain and adjustability are unnecessary, such as simple comparator thresholds or biasing.

Is the SOD323 package of PZU11B1A,115 compatible with standard reflow profiles for lead-free soldering?

Yes - Nexperia specifies compatibility with JEDEC J-STD-020D reflow profiles. The SOD323 footprint in Figure 10 (0.5 mm pad width, 0.6 mm spacing) supports peak temperatures up to 260 °C for ≤30 seconds, matching standard Pb-free process windows without risk of delamination or voiding.