Nexperia USA Inc. BZX79-C6V2,133

Overview

BZX79-C6V2,133 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 5 mA test current, 40 Ω typical differential resistance, and 3 μA maximum reverse leakage at 4 V. It delivers stable low-power voltage reference functionality in compact analog power rails and sensor bias networks.

For engineers reviewing the BZX79-C6V2,133 datasheet, BZX79-C6V2,133 pinout, BZX79-C6V2,133 application, or BZX79-C6V2,133 equivalent, this page provides verified electrical parameters, thermal behavior, junction-to-ambient thermal resistance, temperature coefficient, and validated alternative parts for precision voltage reference design.

Technical Context

This device operates as a two-terminal passive voltage reference with fixed breakdown behavior governed by Zener and avalanche mechanisms. Its 6.2 V nominal working voltage falls in the transition region where both mechanisms contribute, yielding a near-zero temperature coefficient of +0.4 to +3.7 mV/K across 1–10 mA operating range.

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

Key Specifications

Pinout & Package

Hermetically sealed axial-leaded SOD27 (DO-35) glass package with cathode indicated by a colored band. Dimensions: D = 1.85 mm max., L = 25.4 mm min., b = 0.56 mm max. Leads are tinned copper-clad steel.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N4735A-T and BZX55C6V2-TR, BZX79-C6V2,133 offers superior thermal resistance control in DO-35 form factor, tighter r_dif consistency (40–150 Ω), and lowest leakage (3 μA), making it optimal for space-constrained, low-quiescent-current reference designs.

Availability

BZX79-C6V2,133 is available at Aetrix Electronics and suitable for industrial sensor biasing, low-power microcontroller reference, LED current regulation, and overvoltage protection clamp applications requiring stable component supply and long-term obsolescence management.

Supply support for BZX79-C6V2,133 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 semiconductors, formed in 2017 from the former NXP Standard Products division, specializing in high-volume, high-reliability components for automotive, industrial, and consumer markets.

The BZX79 series belongs to Nexperia's voltage regulator diode product line, engineered for cost-sensitive, space-constrained applications demanding stable low-power voltage references with proven long-term reliability in harsh environments.

FAQ

What is the maximum continuous power dissipation for BZX79-C6V2,133 at 50 °C ambient?

The maximum continuous power dissipation is 500 mW when mounted on a PCB without metallization pad and with lead length ≤8 mm at T_amb = 50 °C. Derating is required above this temperature at 4.2 mW/°C based on R_{th j-a} = 380 K/W.

Does BZX79-C6V2,133 have a specified Zener impedance curve?

Yes - differential resistance (r_dif) is specified as 40 Ω typical and 150 Ω maximum at I_Z = 5 mA. This value increases significantly below 1 mA and is not characterized below 0.5 mA per datasheet Table 1.

Can BZX79-C6V2,133 be used in surface-mount designs?

No - it uses an axial-leaded SOD27 (DO-35) glass package intended for through-hole mounting. For SMT equivalents, consider Nexperia's PZM series (e.g., PZM6.2NB,215) in SOD-123 package with comparable 6.2 V rating and ±5% tolerance.

What is the cathode marking convention for BZX79-C6V2,133?

The cathode is identified by a single color band (typically black or dark gray) located near one end of the glass body. When installed, the banded end connects to the higher-potential node in reverse-biased Zener operation.