Nexperia USA Inc. BZX79-B2V4,113

Overview

BZX79-B2V4,113 from Nexperia is a ±2% tolerance Zener voltage regulator diode in a hermetically sealed SOD27 (DO-35) glass package, designed for low-power voltage reference and stabilization at 2.4 V nominal Zener voltage with 5 mA test current, 275–600 Ω differential resistance, and −3.5 to −1.6 mV/K temperature coefficient. It supports precision biasing in analog sensor interfaces and low-voltage power rail clamping.

For engineers reviewing the BZX79-B2V4,113 datasheet, BZX79-B2V4,113 pinout, BZX79-B2V4,113 application, or BZX79-B2V4,113 equivalent, this page delivers verified electrical parameters, thermal behavior, reverse leakage limits at VR = 1 V (50 μA max), non-repetitive surge capability (6.0 A peak), and package-specific derating guidance for PCB-mounted operation.

Technical Context

This Zener diode operates in reverse breakdown mode with tightly controlled V_Z = 2.35–2.45 V at I_Ztest = 5 mA, exhibiting negative temperature coefficient (−3.5 to −1.6 mV/K) typical of low-voltage Zeners. Its differential resistance (275–600 Ω) reflects higher impedance than mid-voltage variants, requiring careful current-source design for stable regulation.

Rated for 500 mW total power dissipation at T_amb = 50 °C with 380 K/W junction-to-ambient thermal resistance, it relies on axial lead conduction and minimal PCB copper for heat transfer. Non-repetitive surge handling (40 W, 100 μs square wave) enables transient overvoltage suppression in low-energy signal paths.

Key Specifications

Pinout & Package

Hermetically sealed axial-leaded SOD27 (DO-35) glass package with cathode indicated by a dark band; leads are tinned copper alloy, suitable for through-hole soldering on FR-4 PCBs without thermal pads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5221BS-7-F and BZX55C2V4, BZX79-B2V4,113 offers superior voltage accuracy and surge robustness in through-hole form factor, making it optimal for industrial instrumentation where calibration stability and mechanical reliability are prioritized over footprint size.

Availability

BZX79-B2V4,113 is available at Aetrix Electronics and suitable for temperature sensor biasing, microcontroller reset supervision, and ADC input clamping requiring stable component supply across automotive Tier-2 modules, industrial PLC I/O cards, and medical diagnostic equipment.

Supply support for BZX79-B2V4,113 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 leader in discrete semiconductors, formed in 2017 from the former NXP Standard Products division, with core expertise in high-reliability Zener diodes, logic, and PowerMOS devices.

This device belongs to the BZX79 series of low-power Zener voltage regulators, engineered specifically for precision voltage referencing and stabilization in cost-sensitive, high-volume industrial and consumer electronics.

FAQ

What is the maximum continuous reverse current for stable Zener operation?

The BZX79-B2V4,113 is rated for continuous Zener current up to 208 mA at 2.4 V when ambient temperature is held at 50 °C, based on its 500 mW power limit and thermal resistance. Operation above this requires derating per the R_{th j-a} curve in Figure 2 of the datasheet, with junction temperature not exceeding +200 °C.

How does the temperature coefficient affect accuracy in a 0–70 °C operating range?

With a specified S_Z of −3.5 to −1.6 mV/K, the Zener voltage shifts −0.21 to −0.10 V across a 60 K rise, resulting in −8.75% to −4.17% deviation from 2.4 V nominal. This must be compensated in high-accuracy applications via external trimming or system-level calibration.

Can this diode replace a 2.5 V reference in an op-amp comparator circuit?

No - the BZX79-B2V4,113 is specified at 2.35–2.45 V, falling outside the 2.5 V ±1% (2.475–2.525 V) window required for direct substitution. Using it would shift trip points by ~40 mV, potentially causing functional failure in threshold-sensitive comparators.

Is the SOD27 package compatible with automated through-hole insertion equipment?

Yes - the SOD27 (DO-35) package has standardized axial leads with 25.4 mm pitch and 0.56 mm max diameter, meeting IPC-7351B guidelines for automated placement and wave soldering. Lead length must be trimmed to ≤8 mm after insertion to maintain thermal performance per datasheet Note 2.