Nexperia USA Inc. BZX79-C7V5,143

Overview

BZX79-C7V5,143 from Nexperia is a ±5% tolerance Zener voltage regulator diode in a hermetically sealed SOD27 (DO-35) glass package, rated for 7.5 V nominal Zener voltage at 5 mA test current, 500 mW total power dissipation at 50 °C ambient, and 1 μA reverse leakage at 5 V reverse bias. It serves as a low-power voltage reference or stabilization element in linear power supplies, sensor biasing circuits, and overvoltage protection clamps.

For engineers reviewing the BZX79-C7V5,143 datasheet, BZX79-C7V5,143 pinout, BZX79-C7V5,143 application, or BZX79-C7V5,143 equivalent, this part is selected for precision low-current voltage referencing where ±5% tolerance, low dynamic impedance (30–80 Ω), and stable temperature coefficient (+2.5 to +5.3 mV/K) are required in compact through-hole designs.

Technical Context

This Zener diode operates in reverse breakdown mode with a specified Zener voltage of 7.35–7.65 V at I_Z = 5 mA, exhibiting differential resistance of 30–80 Ω and a positive temperature coefficient of +2.5 to +5.3 mV/K. Its junction-to-ambient thermal resistance is 380 K/W under standard PCB mounting conditions.

The device supports non-repetitive peak reverse power dissipation up to 40 W for 100 μs pulses and maintains reverse leakage ≤1 μA at VR = 5 V, enabling reliable operation in transient-suppression and reference-bias applications across −65 °C to +200 °C storage and junction temperature ranges.

Key Specifications

Pinout & Package

Hermetically sealed SOD27 (DO-35) axial-leaded glass package with cathode indicated by a colored band. Leads are tinned copper-clad steel; body diameter 1.85 mm, length 4.25 mm, lead spacing 25.4 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N4733A and BZX79-B7V5,113, the BZX79-C7V5,143 offers optimal balance of cost, size, and performance for general-purpose 7.5 V referencing-delivering SOD27 compatibility, adequate accuracy, and proven reliability without over-specifying tolerance or package.

Availability

BZX79-C7V5,143 is available at Aetrix Electronics and suitable for low-power voltage reference design, sensor excitation circuitry, and transient overvoltage protection requiring stable component supply and long-lifecycle support.

Supply support for BZX79-C7V5,143 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-volume, high-reliability components.

The BZX79 series belongs to Nexperia's legacy Zener diode product line, designed specifically for cost-effective, robust voltage regulation and referencing in through-hole PCB assemblies across broad industrial applications.

FAQ

What is the maximum continuous forward current for BZX79-C7V5,143?

The maximum continuous forward current is 250 mA at T_amb = 25 °C. This rating applies only during forward conduction (anode positive relative to cathode); the device is intended for reverse-biased Zener operation, where forward bias is avoided in normal use.

Can BZX79-C7V5,143 be used in surface-mount designs?

No - BZX79-C7V5,143 uses an axial-leaded SOD27 (DO-35) glass package designed exclusively for through-hole mounting. It lacks solder pads or terminations compatible with reflow or pick-and-place processes. For SMT equivalents, consider Nexperia's BZX384-C7V5 (SOT-23) or PZM7.5NB (SOD-123).

What is the typical Zener impedance at 5 mA test current?

The differential resistance (r_dif) is 30–80 Ω at I_Z = 5 mA, representing the small-signal AC impedance around the Zener operating point. This value directly impacts regulation accuracy under varying load currents and must be considered when calculating output voltage deviation.

Does BZX79-C7V5,143 have a specified junction-to-case thermal resistance?

No - the datasheet specifies junction-to-tie-point (R_{th j-tp} = 300 K/W) and junction-to-ambient (R_{th j-a} = 380 K/W) thermal resistances only. The tie-point is defined at 8 mm from the package body along the lead; no case or pad thermal data is provided due to the hermetic glass construction and lack of thermal pad.