Nexperia USA Inc. BZX84-B5V1/DG/B2,2

Overview

BZX84-B5V1/DG/B2,2 from Nexperia is a 5.1 V, 250 mW silicon planar Zener diode in SOT23 package, with ±2% tolerance, 5 µA maximum leakage at 2 V, and 60 Ω dynamic impedance at 5 mA, used for precision voltage regulation in low-power sensor biasing circuits.

For engineers reviewing the BZX84-B5V1/DG/B2,2 datasheet, BZX84-B5V1/DG/B2,2 pinout, BZX84-B5V1/DG/B2,2 application, or BZX84-B5V1/DG/B2,2 equivalent, key selection criteria include Zener voltage tolerance, power dissipation limit, dynamic impedance at test current, reverse leakage at sub-breakdown voltage, and SOT23 thermal resistance in PCB-constrained layouts.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and temperature conditions. It is characterized at I_Z = 5 mA with V_Z = 5.1 V, Z_ZT = 60 Ω, and I_R ≤ 5 µA at V_R = 2 V.

The device uses planar epitaxial process for tight voltage distribution and low noise performance. Its SOT23 package supports surface-mount reflow assembly and provides thermal resistance of 375 K/W (junction-to-ambient, on FR4, 1 cm² copper pad).

Key Specifications

Pinout & Package

SOT23 package with three terminals: anode (pin 1), cathode (pin 2), and unused terminal (pin 3) - pin 3 is internally unconnected and must remain floating per datasheet.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMSZ5231B-7-F and BZX84-C5V1,215, the BZX84-B5V1/DG/B2,2 delivers tighter voltage control and lower impedance in the same compact SOT23 footprint-critical for space-constrained, precision-biased analog signal chains.

Availability

BZX84-B5V1/DG/B2,2 is available at Aetrix Electronics and suitable for industrial sensor biasing, USB peripheral protection, and low-power MCU reset circuits requiring stable component supply and consistent parametric performance across production lots.

Supply support for BZX84-B5V1/DG/B2,2 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, with manufacturing rooted in automotive-grade process control and AEC-Q200 qualification infrastructure.

The BZX84 series belongs to Nexperia's precision Zener portfolio designed specifically for voltage reference and clamping in space- and power-constrained consumer, industrial, and computing applications.

FAQ

What is the maximum reverse current before breakdown for BZX84-B5V1/DG/B2,2?

The device exhibits ≤5 µA reverse leakage at 2 V applied reverse voltage, per datasheet test condition. This value is guaranteed across –65 °C to 150 °C operating temperature range and confirms stable non-conducting behavior well below nominal Zener voltage.

Can BZX84-B5V1/DG/B2,2 be used in parallel for higher power dissipation?

No-parallel connection is not recommended due to mismatch in Zener voltage and dynamic impedance between units, causing current hogging and thermal runaway. For higher power, select a single-device alternative like MMSZ5231B-7-F rated at 500 mW.

Is pin 3 of the SOT23 package electrically connected internally?

No-pin 3 is a no-connect terminal with no internal bond wire or die connection. It must remain unconnected on the PCB to prevent parasitic coupling or unintended thermal path effects that could alter Zener voltage stability.

How does the ±2% tolerance affect accuracy in a 12-bit ADC reference application?

At 5.1 V nominal, ±2% corresponds to ±102 mV variation, translating to ±20 LSB error in a 5.1 V full-scale 12-bit ADC. For sub-LSB accuracy, external trimming or post-calibration is required-this tolerance sets the baseline reference uncertainty.