Nexperia USA Inc. BZX79-C22,113

Overview

BZX79-C22,113 from Nexperia is a ±5% tolerance Zener voltage regulator diode with nominal 22 V breakdown voltage at 5 mA test current, 60 Ω typical differential resistance, and −1.6 mV/K temperature coefficient. It operates as a low-power voltage reference in bias networks, power supply feedback paths, and overvoltage protection circuits, rated for 500 mW total power dissipation at 50 °C ambient.

For engineers reviewing the BZX79-C22,113 datasheet, BZX79-C22,113 pinout, BZX79-C22,113 application, or BZX79-C22,113 equivalent, key selection criteria include Zener voltage tolerance (±5%), thermal resistance (380 K/W), non-repetitive peak reverse power (40 W), and DO-35 package compatibility with through-hole PCB assembly.

Technical Context

This discrete Zener diode functions exclusively in reverse-bias breakdown mode to maintain stable DC reference voltages. Its 22 V nominal Zener voltage is specified at I_Ztest = 5 mA, with differential resistance of 60 Ω (typ) ensuring predictable regulation under load variation.

The device exhibits a negative temperature coefficient of −1.6 mV/K at 5 mA, indicating decreasing Zener voltage with rising junction temperature - a critical factor in precision reference designs where thermal drift must be modeled or compensated.

Key Specifications

Pinout & Package

Hermetically sealed axial-leaded SOD27 (DO-35) glass package with cathode indicated by a colored band. Leads are tinned copper-clad steel, suitable for wave or hand soldering.

Key Features

Applications

Availability

BZX79-C22,113 is available at Aetrix Electronics and suitable for power supply feedback references, microcontroller reset circuits, overvoltage protection clamps, and analog sensor bias networks requiring stable component supply across production lifecycles.

Supply support for BZX79-C22,113 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 was designed specifically for low-power voltage regulation and reference applications in cost-sensitive, space-constrained designs where hermetic reliability and standardized E24 voltage options are essential.

FAQ

What is the maximum continuous forward current for BZX79-C22,113?

The absolute maximum continuous forward current is 250 mA at T_amb = 25 °C. This rating assumes no significant self-heating; practical forward conduction should be limited to avoid exceeding junction temperature limits or degrading long-term reliability in reverse-bias regulation mode.

Can BZX79-C22,113 replace BZX79-B22 in existing designs?

No - BZX79-C22,113 has ±5% tolerance (20.8–23.3 V), while BZX79-B22 offers ±2% (21.6–22.4 V). Substituting introduces up to ±3% additional voltage uncertainty, potentially affecting regulation accuracy in precision feedback loops or reference-dependent timing circuits.

What is the thermal resistance from junction to ambient for this diode?

The thermal resistance from junction to ambient (R_{th j-a}) is 380 K/W under standard mounting conditions: axial leads, no metallization pad, max. 8 mm lead length. This value assumes natural convection cooling and directly impacts steady-state power derating above 50 °C ambient.

Does BZX79-C22,113 have a specified capacitance value?

Yes - diode capacitance is 15 pF (typ) at f = 1 MHz and V_R = 0 V. This value affects high-frequency noise coupling and AC impedance in filtering or RF bypass applications but is not characterized for switching-speed-critical uses.