Nexperia USA Inc. BZX79-C62,143

Overview

BZX79-C62,143 from Nexperia is a ±5% tolerance Zener voltage regulator diode in a hermetically sealed SOD27 (DO-35) glass package, rated for 6.2 V nominal Zener voltage at 4 mA test current, 150 Ω typical differential resistance, and 500 mW total power dissipation at Tamb = 50 °C. 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-C62,143 datasheet, BZX79-C62,143 pinout, BZX79-C62,143 application, or BZX79-C62,143 equivalent, this page delivers verified electrical parameters, thermal behavior, cathode identification, and direct substitution guidance - all aligned with Nexperia's official 2002 product data sheet (M3D176).

Technical Context

This device operates as a reverse-biased silicon Zener diode with controlled avalanche breakdown at 6.2 V, exhibiting a positive temperature coefficient of +0.4 to +3.7 mV/K across 1–10 mA operating range. Its low dynamic impedance (150 Ω typ. at I_Z = 4 mA) ensures stable regulation under varying load conditions.

The SOD27 axial-glass package enables reliable thermal conduction through leads, with R_{th j-a} = 380 K/W (unmounted, max lead length) and R_{th j-tp} = 300 K/W (tie-point, 8 mm leads), supporting continuous operation up to T_j = 200 °C and non-repetitive surge handling up to 40 W for 100 μs.

Key Specifications

Pinout & Package

Hermetically sealed SOD27 (DO-35) axial-leaded glass package with cathode identified by a single dark band on the body. Leads are tinned copper-clad steel, suitable for wave or hand soldering. Package dimensions: D = 1.85 mm max, L = 25.4 mm min, b = 0.56 mm max, G1 = 4.25 mm max.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N4735A and BZX55C6V2, BZX79-C62,143 offers optimal balance of axial-leaded serviceability, hermetic reliability, and 500 mW capability - making it preferred for industrial repair, evaluation boards, and mixed-technology assemblies where DO-35 compatibility matters.

Availability

BZX79-C62,143 is available at Aetrix Electronics and suitable for industrial power supplies, sensor interface modules, overvoltage protection circuits, and microcontroller reset networks requiring stable component supply and long-lifecycle support.

Supply support for BZX79-C62,143 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 in 2017 and focused on automotive, industrial, computing, and consumer markets.

The BZX79 series belongs to Nexperia's standard Zener diode portfolio, engineered for low-cost, high-reliability voltage regulation in general-purpose analog and power management circuits.

FAQ

What is the maximum continuous reverse current this diode can handle at 6.2 V?

The BZX79-C62,143 is not rated for continuous reverse conduction at its Zener voltage. It is designed for regulated shunt operation with a series current-limiting resistor. At 6.2 V, the maximum continuous Zener current is derived from P_tot/V_Z ≈ 500 mW / 6.2 V ≈ 80 mA - but actual safe operating current is limited to ≤45 mA per thermal derating curves to maintain T_j ≤ 150 °C at Tamb = 50 °C.

How is the cathode identified on the BZX79-C62,143 package?

The cathode is marked by a single dark band on the glass body of the SOD27 (DO-35) package. This band aligns with the cathode terminal, which must be connected to the higher-potential node in Zener regulation configurations. The unbanded end is the anode and connects to ground or the lower-potential reference point.

Can this diode replace a BZX79-B62 in a precision reference circuit?

No - the BZX79-C62,143 has ±5% voltage tolerance versus ±2% for the BZX79-B62 variant. In precision references requiring <±2% accuracy (e.g., ADC voltage references or calibration circuits), the C-series introduces up to ±0.31 V error at 6.2 V, exceeding typical design margins. Use only where system-level tolerance budgets accommodate ±5% variation.

Does this part meet RoHS and REACH compliance requirements?

Yes - as a Nexperia standard product manufactured post-2006, BZX79-C62,143 complies with EU RoHS Directive 2011/65/EU (lead-free terminations) and REACH Regulation (EC) No. 1907/2006. Material declarations and SVHC statements are available via Nexperia's product portal using order code 9397 750 09387.