Nexperia USA Inc. BZX79-C3V0,133

Overview

BZX79-C3V0,133 from Nexperia is a ±5% tolerance Zener voltage regulator diode with nominal 3.0 V breakdown voltage at 5 mA test current, 325 Ω typical differential resistance, and −2.1 mV/K temperature coefficient. It operates in low-power voltage reference and stabilization circuits, such as power supply feedback networks and precision analog biasing in industrial sensor interfaces.

For engineers reviewing the BZX79-C3V0,133 datasheet, BZX79-C3V0,133 pinout, BZX79-C3V0,133 application, or BZX79-C3V0,133 equivalent, key selection criteria include Zener voltage tolerance (±5%), thermal coefficient (−2.1 mV/K), reverse leakage (10 μA at VR = 1 V), DO-35 package compatibility, and 500 mW total power dissipation at Tamb = 50 °C.

Technical Context

This device functions as a two-terminal passive voltage reference, relying on controlled avalanche or Zener breakdown in silicon PN junctions. Its regulation behavior is defined by specified test current (IZ = 5 mA), differential resistance (rdif = 325–600 Ω), and temperature coefficient (SZ = −2.1 mV/K), all measured under standardized thermal conditions (Tj = 25 °C).

The BZX79-C3V0,133 exhibits non-repetitive surge capability up to 40 W for 100 μs pulses and maintains stable operation across −65 °C to +200 °C storage and junction temperature ranges. Its hermetically sealed SOD27 (DO-35) glass package ensures long-term reliability in humid or chemically aggressive environments without metallization pad dependency.

Key Specifications

Pinout & Package

Hermetically sealed axial-leaded SOD27 (DO-35) glass package with cathode identified by a colored band. Leads are tinned copper-clad steel, suitable for wave or hand soldering. Device has no polarity-sensitive terminals beyond anode/cathode orientation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N4723-TAP and BZX55-C3V0, the BZX79-C3V0,133 offers optimal balance of compact DO-35 packaging, verified −2.1 mV/K thermal stability, and industry-standard 500 mW derating profile for embedded analog subsystems.

Availability

BZX79-C3V0,133 is available at Aetrix Electronics and suitable for industrial sensor biasing, microcontroller reset circuits, low-power LED current control, and ADC reference stabilization requiring stable component supply and long-lifecycle support.

Supply support for BZX79-C3V0,133 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, logic, and PowerMOS semiconductors, serving automotive, industrial, computing, consumer, and wearable markets with high-volume, high-reliability components.

The BZX79 series belongs to Nexperia's standard voltage regulator diode product line, engineered for cost-effective, space-efficient voltage referencing in low-power analog and mixed-signal systems.

FAQ

What is the maximum continuous power dissipation for BZX79-C3V0,133?

The BZX79-C3V0,133 has a total power dissipation rating of 500 mW at ambient temperature of 50 °C with standard PCB mounting (lead length ≤8 mm, no metallization pad). At higher ambient temperatures, derating applies per Rth j-a = 380 K/W, reducing usable power linearly above 50 °C.

How does the temperature coefficient affect regulation accuracy?

The BZX79-C3V0,133 has a temperature coefficient of −2.1 mV/K, meaning its Zener voltage decreases by approximately 2.1 mV per Kelvin rise in junction temperature. Over a 100 K range (e.g., −25 °C to +75 °C), this contributes up to ±210 mV drift - a key factor in high-precision reference designs requiring external compensation or tighter thermal management.

Is BZX79-C3V0,133 compatible with lead-free reflow processes?

Yes - the SOD27 (DO-35) package uses tinned copper-clad steel leads rated for standard lead-free reflow profiles (peak temperature ≤260 °C, 10 s max). The hermetic glass body remains unaffected by typical JEDEC J-STD-020-compliant thermal cycles, ensuring mechanical and electrical integrity post-assembly.

What is the reverse leakage current specification at 1 V?

At VR = 1 V and Tj = 25 °C, the BZX79-C3V0,133 exhibits a maximum reverse leakage current of 10 μA. This value is critical for determining minimum bias current in high-impedance reference circuits and influences start-up behavior in low-power applications where quiescent current must remain below 100 μA.