Nexperia USA Inc. BZX79-C10,133

Overview

BZX79-C10,133 from Nexperia is a ±5% tolerance Zener voltage regulator diode with nominal 10 V breakdown voltage at 7 V reverse bias, 50–150 Ω differential resistance at 5 mA test current, and 200 nA reverse leakage at rated voltage. It operates as a low-power voltage reference in signal conditioning, power supply feedback, and analog sensor biasing circuits.

For engineers reviewing the BZX79-C10,133 datasheet, BZX79-C10,133 pinout, BZX79-C10,133 application, or BZX79-C10,133 equivalent, key selection criteria include Zener voltage tolerance (±5%), thermal resistance (380 K/W), non-repetitive surge capability (90 A peak reverse current), and DO-35 glass package compatibility with through-hole PCB assembly.

Technical Context

This device functions as a two-terminal passive voltage reference, relying on controlled avalanche or Zener breakdown in silicon PN junction under reverse bias. Its regulation performance depends on stable junction temperature, defined test current (IZ = 7 V), and thermal path to ambient via axial leads.

The BZX79-C10,133 exhibits a positive temperature coefficient of +4.5 to +8.0 mV/K at 5 mA, enabling predictable drift compensation in multi-diode references. Its 90 pF junction capacitance at 0 V and 1 MHz limits high-frequency noise filtering use but supports DC/low-frequency stabilization.

Key Specifications

Pinout & Package

Hermetically sealed SOD27 (DO-35) axial-leaded glass package with cathode band marking. Leads are tinned copper-clad steel; body diameter 1.85 mm, length 4.25 mm, lead spacing 25.4 mm.

Key Features

Applications

Availability

BZX79-C10,133 is available at Aetrix Electronics and suitable for power supply feedback, sensor bias reference, and overvoltage clamp applications requiring stable component supply and long-lifecycle support.

Supply support for BZX79-C10,133 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, specializing in high-volume, high-reliability components for automotive, industrial, and consumer electronics.

The BZX79 series belongs to Nexperia's legacy Zener diode product line, engineered for cost-effective, through-hole voltage regulation in space-constrained and thermally demanding environments.

FAQ

What is the maximum continuous power dissipation for BZX79-C10,133?

The BZX79-C10,133 has a total power dissipation rating of 500 mW at ambient temperature ≤50 °C with specified lead length and PCB mounting conditions. Derating is required above 50 °C ambient per its 380 K/W junction-to-ambient thermal resistance.

How does the ±5% tolerance affect circuit accuracy?

The ±5% tolerance means the actual Zener voltage falls between 9.4 V and 10.6 V at 7 V reverse bias. This directly sets the worst-case regulation window in feedback loops and must be accounted for in error budgeting for precision analog systems.

Can BZX79-C10,133 replace BZX79-B10 in existing designs?

No - BZX79-C10,133 has ±5% tolerance versus BZX79-B10's ±2%, resulting in wider voltage spread (±0.5 V vs. ±0.2 V). Differential resistance also differs (50–150 Ω vs. 40–150 Ω), affecting load regulation. Substitution requires revalidation of reference stability.

What is the significance of the cathode band marking?

The black cathode band identifies the Zener breakdown terminal - it must be connected to the higher-potential node in reverse-bias configuration. Incorrect orientation causes forward conduction (≤0.9 V drop) instead of regulation, leading to circuit malfunction.