Nexperia USA Inc. BZX79-C6V2,143

Overview

BZX79-C6V2,143 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 working voltage at 5 mA test current, 40 Ω typical differential resistance, and 3 μA maximum reverse current at 4 V. It delivers stable low-voltage reference or stabilization in power supply feedback paths and sensor bias networks.

For engineers reviewing the BZX79-C6V2,143 datasheet, BZX79-C6V2,143 pinout, BZX79-C6V2,143 application, or BZX79-C6V2,143 equivalent, this part serves as a cost-optimized, through-hole Zener solution where ±5% voltage tolerance, 500 mW total power dissipation, and 200 °C junction temperature capability are design-critical.

Technical Context

This device operates as a two-terminal silicon Zener diode with controlled reverse breakdown behavior. Its regulation relies on avalanche and Zener mechanisms depending on voltage range - for 6.2 V, both contribute, yielding a near-zero temperature coefficient (~0.4 to 3.7 mV/K) and low dynamic impedance (40–150 Ω).

The SOD27 package enables axial lead mounting with defined thermal resistance (R_{th j-a} = 380 K/W), and its non-repetitive peak reverse power rating of 40 W at 100 μs supports transient suppression in low-energy surge scenarios when used with appropriate series limiting.

Key Specifications

Pinout & Package

Hermetically sealed axial-leaded SOD27 (DO-35) glass package with cathode band marking. Lead pitch not specified; body diameter ~1.85 mm, length ~4.25 mm, lead length ≥25.4 mm per JEDEC DO-35 standard.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N4735A and BZX79-B6V2,113, the BZX79-C6V2,143 offers optimal balance of cost, size, and performance for general-purpose voltage referencing where ±5% tolerance and 500 mW dissipation meet system requirements.

Availability

BZX79-C6V2,143 is available at Aetrix Electronics and suitable for power supply feedback loops, sensor bias networks, microcontroller I/O protection, and ADC reference stabilization requiring stable component supply across industrial control, instrumentation, and consumer electronics programs.

Supply support for BZX79-C6V2,143 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, and consumer markets with high-volume, high-reliability components.

The BZX79 series belongs to Nexperia's standard voltage regulator diode product line, designed specifically for cost-sensitive, through-hole-based voltage reference and stabilization in legacy and new-design power management circuits.

FAQ

What is the cathode identification method for BZX79-C6V2,143?

The cathode is marked by a distinct color band on the glass body of the SOD27 package. When mounted in-circuit, the banded end connects to the higher-potential node (e.g., regulated rail or input), while the unbanded (anode) end connects to ground or lower potential. This orientation is mandatory for proper Zener breakdown operation.

Can BZX79-C6V2,143 be used in parallel for higher current handling?

No - Zener diodes must not be paralleled without individual ballast resistors due to manufacturing variations in V_Z and r_diff, which cause current imbalance and thermal runaway. For higher current, use a single higher-power Zener (e.g., 1N4735A) or active regulation with a transistor pass element.

What is the maximum allowable continuous reverse current at 25 °C?

At 25 °C ambient and with adequate PCB heat sinking, the maximum continuous reverse current is determined by the 500 mW power limit: I_Z(max) ≈ 500 mW / 6.2 V ≈ 80.6 mA. However, derating is required above 50 °C ambient per the 380 K/W thermal resistance specification.

Does BZX79-C6V2,143 meet RoHS and REACH compliance?

Yes - as a Nexperia standard product manufactured post-2017, BZX79-C6V2,143 complies with EU RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. Material declarations and substance reports are available via Nexperia's official product portal using the full orderable part number.