Nexperia USA Inc. PZU4.7B1A,115

Overview

PZU4.7B1A,115 from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 4.7 V nominal working voltage, 800 Ω maximum differential resistance at 5 mA, and 2 µA reverse current at 0.5 mA test condition. It delivers stable reference voltage in low-power analog circuits, power supply feedback loops, and overvoltage protection stages.

For engineers reviewing the PZU4.7B1A,115 datasheet, PZU4.7B1A,115 pinout, PZU4.7B1A,115 application, or PZU4.7B1A,115 equivalent, key selection criteria include Zener voltage tolerance (±2 %), low leakage (2 µA @ I_Z = 0.5 mA), hard breakdown knee, and thermal resistance of 255 K/W (junction-to-solder point) on standard FR4 PCB.

Technical Context

This Zener diode operates in reverse-biased breakdown mode to maintain precise DC voltage regulation across varying load and line conditions. Its design emphasizes low dynamic impedance (800 Ω max at 5 mA) and minimal temperature coefficient drift (−1.4 mV/K typical at 4.7 V), enabling stable references in compact, thermally constrained layouts.

The device features a hard breakdown knee and very low leakage current-critical for high-impedance sensing nodes and battery-powered systems where standby current must remain below 100 nA. It is optimized for surface-mounted designs with SOD323 footprint compatibility and reflow/wave soldering support per JEDEC standards.

Key Specifications

Pinout & Package

SOD323 (SC-76) plastic surface-mount 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-B4V7,115 and MMSZ4701T1G, PZU4.7B1A,115 offers the lowest combination of leakage (2 µA), dynamic impedance (800 Ω), and package size (SOD323), making it optimal for space-constrained, low-power precision regulation where thermal resistance and knee sharpness matter.

Availability

PZU4.7B1A,115 is available at Aetrix Electronics and suitable for power supply feedback, overvoltage clamping, and precision reference voltage generation requiring stable component supply across industrial, consumer, and automotive-qualified (non-safety-critical) programs.

Supply support for PZU4.7B1A,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 devices, serving automotive, industrial, and consumer markets with ISO/TS 16949-certified manufacturing.

The PZUxBA series targets general-purpose Zener regulation in space-constrained SMD applications, emphasizing tight tolerance, low leakage, and robust surge handling for modern power and signal conditioning circuits.

FAQ

What is the maximum continuous Zener current for PZU4.7B1A,115 at 25 °C ambient?

The maximum continuous forward current is 200 mA, but Zener operation is defined by reverse current. At 25 °C ambient on standard FR4 PCB, the device supports up to ~68 mA continuous Zener current before exceeding its 320 mW total power dissipation limit-calculated as 320 mW ÷ 4.7 V ≈ 68 mA. Derating applies above 25 °C.

How does the −1.4 mV/K temperature coefficient affect regulation accuracy over temperature?

A −1.4 mV/K coefficient means the Zener voltage decreases by approximately 1.4 mV per Kelvin rise in junction temperature. Over a 125 °C range (−55 °C to +70 °C), this introduces ~175 mV drift-about ±3.7 % of 4.7 V. This is factored into system-level accuracy budgets and mitigated via layout thermal management or compensation circuits.

Can PZU4.7B1A,115 be used in place of a 5.1 V Zener in an existing design?

No-it is not a direct replacement due to its 4.7 V nominal Zener voltage. Substituting would reduce regulated output by ~0.4 V, potentially causing functional failure in feedback loops or reference-dependent circuits. Only use if the system's voltage margin accommodates this 8.5 % reduction and all parameters (leakage, impedance, power) remain within specification.

Is the SOD323 package compatible with standard reflow soldering profiles?

Yes-the device is qualified for lead-free reflow per J-STD-020. Recommended peak temperature is 260 °C for ≤ 30 seconds, with ramp rates ≤ 3 °C/s. The SOD323 footprint shown in Figure 10 (sod323_fr) specifies 0.6 mm solder land width and 0.5 mm solder paste stencil openings for reliable joint formation.