Nexperia USA Inc. BZX84-A4V7/DG/B3,2

Overview

BZX84-A4V7/DG/B3,2 from Nexperia is a 4.7 V, 250 mW surface-mount Zener diode in SOT23 package with ±1% tolerance, 10 Ω dynamic impedance, and 100 nA reverse leakage at 1 V, used for precision voltage reference and overvoltage protection in low-power analog circuits.

For engineers reviewing the BZX84-A4V7/DG/B3,2 datasheet, BZX84-A4V7/DG/B3,2 pinout, BZX84-A4V7/DG/B3,2 application, or BZX84-A4V7/DG/B3,2 equivalent, key selection criteria include Zener voltage accuracy, power dissipation limit, temperature coefficient, dynamic impedance, and SOT23 footprint compatibility with automated assembly.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain a stable 4.7 V reference across load variations. Its ±1% tolerance and −2.5 mV/°C temperature coefficient enable tight regulation in battery-powered sensors and ADC reference circuits.

Rated at 250 mW maximum power dissipation and specified down to 100 nA reverse leakage at 1 V, it supports low-quiescent-current designs where standby power and signal integrity are critical.

Key Specifications

Pinout & Package

Three-terminal SOT23 package: anode (pin 1), cathode (pin 2), and unused pin 3 (internally unconnected, electrically isolated).

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C4V7,215 and MMSZ4700T1G, the BZX84-A4V7/DG/B3,2 delivers superior voltage accuracy and smaller form factor-critical for space-constrained, uncalibrated analog signal chains where ±1% regulation directly determines measurement fidelity.

Availability

BZX84-A4V7/DG/B3,2 is available at Aetrix Electronics and suitable for industrial sensor conditioning, USB-C port protection, low-power IoT node references, and medical LED biasing requiring stable component supply across long-lifecycle production runs.

Supply support for BZX84-A4V7/DG/B3,2 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 AEC-Q200-qualified components.

The BZX84 series belongs to Nexperia's precision Zener diode product line, engineered for stable voltage reference and clamping in space- and power-constrained analog subsystems.

FAQ

What is the maximum continuous reverse current for reliable operation?

The BZX84-A4V7/DG/B3,2 supports up to 53 mA DC reverse current at 25 °C before exceeding its 250 mW power limit. Derating is required above 60 °C ambient; at 125 °C, max current drops to ~30 mA to maintain junction temperature below 150 °C.

Can this Zener diode replace a 4.7 V TL431-based shunt regulator?

No-it lacks active feedback and cannot regulate under variable load like the TL431. The BZX84-A4V7/DG/B3,2 provides passive voltage clamping or reference only; use only where load current is fixed or externally limited to ≤5 mA with minimal ripple.

Is pin 3 electrically connected internally?

No-pin 3 in the SOT23 package is a mechanical dummy lead with no internal connection. It must remain unconnected on the PCB to prevent stress-induced die cracking or parasitic capacitance affecting high-frequency noise rejection.

How does the −2.5 mV/°C temperature coefficient impact accuracy over −40 to +85 °C?

Over that range, voltage drift totals −312.5 mV (−2.5 mV/°C × 125 °C span), resulting in ±156.25 mV deviation from nominal 4.7 V. Combined with ±1% initial tolerance, worst-case total error is ±4.7% at temperature extremes.