Nexperia USA Inc. BZX79-C8V2,133

Overview

BZX79-C8V2,133 from Nexperia is a ±5% tolerance Zener voltage regulator diode in a hermetically sealed SOD27 (DO-35) glass package, rated for 8.2 V nominal Zener voltage at 5 mA test current, 40 Ω typical differential resistance, and 700 nA reverse leakage at 5 V. It delivers stable low-power voltage reference functionality in analog signal conditioning and power rail stabilization circuits.

For engineers reviewing the BZX79-C8V2,133 datasheet, BZX79-C8V2,133 pinout, BZX79-C8V2,133 application, or BZX79-C8V2,133 equivalent, this page provides verified electrical parameters, thermal behavior, package geometry, and real-world design context for precision voltage reference selection in space-constrained, low-current embedded systems.

Technical Context

This Zener diode operates in reverse breakdown mode with a nominal 8.2 V regulation point, exhibiting a positive temperature coefficient of +3.2 mV/K at 5 mA - enabling predictable drift compensation in temperature-sensitive references. Its 40 Ω typical dynamic impedance ensures minimal output voltage variation under load changes up to 250 mA forward current capability.

The device is optimized for DC voltage stabilization in low-power analog stages, featuring 150 W non-repetitive peak reverse power dissipation capability (100 μs pulse), 500 mW total continuous power dissipation at 50 °C ambient, and junction-to-ambient thermal resistance of 380 K/W - all validated per IEC 60134 absolute maximum ratings.

Key Specifications

Pinout & Package

Hermetically sealed axial-leaded SOD27 (DO-35) glass package with cathode band marking; 2-terminal discrete diode requiring no orientation-specific PCB layout beyond cathode identification.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX79-C8V2,133, the 1N4737A trades smaller size for higher power and lower impedance, while the BZX79-B8V2,133 retains identical form factor but improves regulation accuracy and dynamic response at the cost of tighter process control and price premium.

Availability

BZX79-C8V2,133 is available at Aetrix Electronics and suitable for power supply reference, sensor signal conditioning, microcontroller reset circuit, and overvoltage clamp protection requiring stable component supply across automotive, industrial, and consumer electronics programs.

Supply support for BZX79-C8V2,133 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 high-volume discrete, logic, and PowerMOS semiconductors, spun off from NXP in 2017 and focused on automotive, industrial, computing, and consumer markets.

This part belongs to the BZX79 series of low-power Zener diodes designed specifically for cost-effective, space-efficient voltage regulation and reference functions in through-hole analog circuits.

FAQ

What is the maximum continuous power dissipation for BZX79-C8V2,133?

The BZX79-C8V2,133 has a maximum continuous power dissipation of 500 mW at an ambient temperature of 50 °C with leads trimmed to 8 mm, per IEC 60134 limiting values. At higher ambient temperatures, derating applies - e.g., 400 mW at 70 °C - based on its 380 K/W junction-to-ambient thermal resistance.

How does the temperature coefficient affect regulation accuracy?

The BZX79-C8V2,133 exhibits a typical +3.2 mV/K temperature coefficient at 5 mA, meaning its Zener voltage increases by ~3.2 mV per degree Celsius rise. Over a 0–70 °C range, this results in ~224 mV total drift, which must be accounted for in precision reference designs or compensated using complementary components.

Can BZX79-C8V2,133 be used in surface-mount designs?

No - BZX79-C8V2,133 uses the axial-leaded SOD27 (DO-35) glass package and is not compatible with SMT assembly. For surface-mount equivalents, consider Nexperia's PZM series (e.g., PZM8.2NB,115) in SOD-123 package, which offer matching 8.2 V regulation but require requalification for thermal and parasitic performance.

What is the reverse leakage current at 5 V?

The reverse leakage current for BZX79-C8V2,133 is specified as a maximum of 700 nA at V_R = 5 V and T_j = 25 °C. This ultra-low leakage supports high-impedance bias networks and minimizes error in precision current-source applications where leakage would otherwise dominate node currents.