Nexperia USA Inc. BZX79-C11,113

Overview

BZX79-C11,113 from Nexperia is a ±5% tolerance Zener voltage regulator diode in a hermetically sealed SOD27 (DO-35) glass package, rated for 11 V nominal working voltage at 8 V reverse bias, with 100 nA maximum reverse current, 50–150 Ω differential resistance at 5 mA test current, and 500 mW total power dissipation at Tamb = 50 °C. It serves as a low-power voltage reference in linear regulators and signal conditioning circuits.

For engineers reviewing the BZX79-C11,113 datasheet, BZX79-C11,113 pinout, BZX79-C11,113 application, or BZX79-C11,113 equivalent, key selection criteria include Zener voltage tolerance (±5%), thermal resistance (380 K/W), non-repetitive peak reverse power (40 W), cathode-marked axial lead configuration, and suitability for low-current stabilization in space-constrained analog subsystems.

Technical Context

This discrete Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under controlled current conditions. Its E24-series 11 V nominal rating is specified at I_Ztest = 5 mA, with temperature coefficient of +5.4 to +9.0 mV/K and typical junction capacitance of 10–20 pF at 0 V.

The device uses a planar silicon junction structure in a glass-encapsulated axial package, optimized for low leakage (100 nA @ VR = 8 V) and predictable dynamic impedance (50–150 Ω). It is not intended for high-speed switching or surge clamping beyond single 100 μs pulses up to 40 W.

Key Specifications

Pinout & Package

Two-terminal axial-leaded device in SOD27 (DO-35) hermetically sealed glass package; cathode identified by a dark band on the glass body. Leads are tinned copper alloy, suitable for wave or hand soldering.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N4740A and BZX55-C11, BZX79-C11,113 offers superior thermal resistance control (380 K/W vs. ~500 K/W), tighter differential resistance consistency (50–150 Ω), and optimized leakage performance for low-power analog monitoring-making it preferred for space- and efficiency-critical embedded references.

Availability

BZX79-C11,113 is available at Aetrix Electronics and suitable for low-voltage stabilizers, analog signal clamping, microcontroller reset generation, and precision voltage monitoring requiring stable component supply across automotive infotainment, industrial sensor interfaces, and consumer power management designs.

Supply support for BZX79-C11,113 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 semiconductors, formed in 2017 from the former NXP Standard Products division, specializing in high-volume, high-reliability components for automotive, industrial, and computing markets.

The BZX79 series belongs to Nexperia's voltage regulator diode product line, engineered for cost-sensitive, low-power voltage reference and stabilization in space-constrained PCB layouts where hermetic reliability and E24-standardized Zener voltages are essential.

FAQ

What is the maximum continuous reverse current this Zener can handle at 11 V?

The BZX79-C11,113 does not specify a maximum continuous reverse current at 11 V; instead, its safe operating area is defined by total power dissipation (500 mW at Tamb = 50 °C). At 11 V, this corresponds to ≤45.5 mA average Zener current. Exceeding this risks thermal runaway due to its 380 K/W junction-to-ambient resistance.

Can this diode be used in place of a 12 V Zener for undervoltage detection?

No-BZX79-C11,113 has a guaranteed Zener voltage range of 10.4–11.6 V at 5 mA, making it unsuitable as a true 12 V reference. For 12 V detection, BZX79-C12 (11.4–12.7 V) is the correct variant; substituting C11 would result in premature trip points and system instability under nominal 12 V rail conditions.

Is the SOD27 package compatible with automated pick-and-place assembly?

Yes-the SOD27 (DO-35) package is compatible with standard axial-component feeders and vacuum nozzles used in high-volume SMT lines, provided tape-and-reel packaging (e.g., 10,000 pcs per reel) and proper nozzle sizing (1.8–2.2 mm tip diameter) are employed. Lead coplanarity and band orientation must be verified per IPC-A-610 Class 2 requirements.

Does this Zener require a series current-limiting resistor in all applications?

Yes-BZX79-C11,113 must always be used with a series resistor to limit Zener current within its 500 mW power rating and prevent thermal destruction. For example, with a 15 V supply and target 5 mA Zener current, a 820 Ω ±5% resistor ensures safe operation while maintaining regulation accuracy across temperature.