Nexperia USA Inc. BZX79-B6V8,143

Overview

BZX79-B6V8,143 from Nexperia is a ±2% tolerance Zener voltage regulator diode in a hermetically sealed SOD27 (DO-35) glass package, rated for 6.66–6.94 V nominal Zener voltage at 5 mA test current, 30–80 Ω differential resistance, and 500 mW total power dissipation at Tamb = 50 °C. It serves as a precision low-voltage reference or stabilization element in linear power supply feedback paths, sensor biasing circuits, and overvoltage clamp stages.

For engineers reviewing the BZX79-B6V8,143 datasheet, BZX79-B6V8,143 pinout, BZX79-B6V8,143 application, or BZX79-B6V8,143 equivalent, this page delivers verified electrical parameters, thermal behavior under surge conditions, temperature coefficient profile, reverse leakage at VR = 4 V, and validated alternatives for voltage reference design continuity.

Technical Context

This device operates as a two-terminal silicon Zener diode with controlled avalanche breakdown at 6.8 V nominal, exhibiting a positive temperature coefficient of +1.2 to +4.5 mV/K across 1–10 mA operating range. Its low differential resistance ensures stable regulation under varying load currents in shunt-regulated topologies.

The SOD27 package enables axial lead mounting on PCBs without metallization pads, with thermal resistance from junction to ambient at 380 K/W (lead length ≤8 mm). Non-repetitive peak reverse power dissipation reaches 40 W for 100 μs pulses at Tj = 25 °C prior to surge.

Key Specifications

Pinout & Package

Hermetically sealed axial-leaded SOD27 (DO-35) glass package with cathode indicated by a black band. Leads are tinned copper-clad steel, suitable for wave or hand soldering.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5235B,215 and BZX84-C6V8,215, the BZX79-B6V8,143 offers superior regulation accuracy (±2% vs ±5%), lower dynamic impedance, higher continuous power rating, and proven surge robustness-making it optimal for legacy through-hole designs demanding stable voltage references.

Availability

BZX79-B6V8,143 is available at Aetrix Electronics and suitable for industrial power supplies, sensor interface modules, overvoltage protection circuits, and microcontroller reset generators requiring stable component supply and long-lifecycle support.

Supply support for BZX79-B6V8,143 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, spun off from NXP's Standard Products division in 2017 and focused on automotive, industrial, computing, and consumer markets.

The BZX79 series belongs to Nexperia's legacy Zener diode product line, engineered for high-reliability voltage reference and stabilization in cost-sensitive, high-volume applications where hermetic sealing and tight tolerances are critical.

FAQ

What is the maximum continuous forward current rating for BZX79-B6V8,143?

The absolute maximum continuous forward current is 250 mA at T_amb ≤ 50 °C, per IEC 60134 limiting values. This rating assumes no sustained reverse bias operation and is intended for brief forward-conduction checks-not for rectification duty. Exceeding this value risks thermal runaway due to low thermal resistance in the SOD27 package.

How does the temperature coefficient affect regulation accuracy over –40 °C to +125 °C?

At I_Z = 5 mA, the temperature coefficient ranges from +1.2 to +4.5 mV/K. Over a 165 °C span, this produces a worst-case drift of +743 mV (4.5 × 165), shifting V_Z from 6.66 V to ~7.4 V. For high-accuracy applications, derating or compensation using complementary components is required.

Can BZX79-B6V8,143 be used in parallel for higher power dissipation?

No-Zener diodes exhibit negative temperature coefficients in certain regions and mismatched rdif causes current hogging. Parallel operation leads to thermal instability and premature failure. For >500 mW requirements, use a single higher-rated Zener or implement active regulation with a pass transistor.

Is the SOD27 package RoHS compliant and lead-free?

Yes-the SOD27 package used for BZX79-B6V8,143 meets RoHS Directive 2011/65/EU and is lead-free. Nexperia confirms compliance in its product change notifications (PCNs), with solderability tested per J-STD-002D using SnAgCu alloy at 245 °C peak temperature.