Nexperia USA Inc. BZX79-B4V7,113

Overview

BZX79-B4V7,113 from Nexperia is a ±2% tolerance Zener voltage regulator diode in a hermetically sealed SOD27 (DO-35) glass package, rated for 4.7 V nominal Zener voltage at 5 mA test current, 425 Ω typical differential resistance, and −1.4 mV/K temperature coefficient. It delivers stable low-voltage reference or stabilization in power supply feedback paths, voltage clamp circuits, and precision bias networks.

For engineers reviewing the BZX79-B4V7,113 datasheet, BZX79-B4V7,113 pinout, BZX79-B4V7,113 application, or BZX79-B4V7,113 equivalent, this part serves as a low-power, high-stability 4.7 V reference with verified thermal behavior up to 200 °C junction temperature, validated reverse leakage ≤3 μA at 2 V, and non-repetitive surge capability of 6.0 A peak reverse current.

Technical Context

This Zener diode operates in reverse breakdown mode with tightly controlled voltage regulation across its specified current range (1–10 mA). Its −1.4 mV/K temperature coefficient ensures minimal drift over industrial temperature ranges, and its 425 Ω differential resistance supports stable regulation under moderate load variation.

The device uses axial-leaded SOD27 packaging with cathode band marking, enabling direct PCB mounting without metallization pads. Thermal resistance from junction to ambient is 380 K/W, limiting continuous dissipation to 400 mW at 50 °C ambient per IEC 60134 absolute maximum ratings.

Key Specifications

Pinout & Package

Hermetically sealed axial-leaded SOD27 (DO-35) glass package with cathode band marking; lead length ≤8 mm for thermal compliance. No active die-side terminals - two-terminal device with unidirectional conduction.

Key Features

Applications

Availability

BZX79-B4V7,113 is available at Aetrix Electronics and suitable for power supply feedback reference, overvoltage clamp circuit, and temperature-stable bias network applications requiring stable component supply and long-lifecycle support.

Supply support for BZX79-B4V7,113 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, logic, and PowerMOS semiconductors, serving automotive, industrial, computing, consumer, and wearable markets with high-reliability components.

The BZX79 series belongs to Nexperia's voltage regulator diode product line, engineered for precision low-power voltage reference and stabilization in space-constrained, thermally demanding applications.

FAQ

What is the maximum continuous power dissipation for BZX79-B4V7,113 at 50 °C ambient?

The maximum continuous power dissipation is 500 mW when mounted on a PCB with 8 mm lead length and tie-point temperature ≤50 °C, per IEC 60134 limiting values. Derating applies above 50 °C ambient at 3.3 mW/°C based on 380 K/W thermal resistance.

Does BZX79-B4V7,113 have a cathode marking, and how is it identified?

Yes - the cathode is marked by a distinct color band on the glass body of the SOD27 (DO-35) package. This band must be oriented toward the higher-potential node in Zener regulation or clamping configurations to ensure correct reverse-bias operation.

Can BZX79-B4V7,113 replace BZX79-C4V7 in existing designs?

No - BZX79-B4V7,113 has ±2% tolerance while BZX79-C4V7 has approx. ±5% tolerance. Substitution may degrade regulation accuracy in precision feedback or reference applications unless system-level tolerance analysis confirms acceptability.

What is the typical Zener impedance at 5 mA, and why does it matter?

The typical differential resistance is 425 Ω at 5 mA test current. This value determines AC impedance in the regulation region - lower values improve ripple rejection and transient response in voltage reference circuits, especially under varying load conditions.