Nexperia USA Inc. BZX79-C16,113

Overview

BZX79-C16,113 from Nexperia is a ±5% tolerance Zener voltage regulator diode with nominal 16 V working voltage at 5 mA test current, 50 Ω typical differential resistance, and 10.4 mV/K temperature coefficient. It operates in low-power stabilization circuits requiring stable reference voltages under ambient temperatures up to +200 °C, such as power supply feedback loops and sensor biasing networks.

For engineers reviewing the BZX79-C16,113 datasheet, BZX79-C16,113 pinout, BZX79-C16,113 application, or BZX79-C16,113 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 device functions as a passive two-terminal voltage reference, relying on controlled reverse breakdown conduction. Its operation requires a series current-limiting resistor to maintain Zener test current (5 mA) within safe power limits (max. 500 mW at T_amb = 50 °C).

It exhibits a positive temperature coefficient (+10.4 mV/K at I_Z = 5 mA), enabling predictable drift compensation in multi-diode references. Junction-to-ambient thermal resistance (380 K/W) defines its derating behavior under sustained load conditions.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N4744A and BZX79-C15,113, the BZX79-C16,113 offers optimal trade-off between 16 V regulation target, DO-35 form factor, and 500 mW thermal envelope-making it preferred for compact 16 V feedback and clamp designs where pin-for-pin replacement is unnecessary but functional alignment matters.

Availability

BZX79-C16,113 is available at Aetrix Electronics and suitable for power supply feedback loops, sensor bias references, overvoltage clamp circuits, and microcontroller reset generators requiring stable component supply and long-term obsolescence management.

Supply support for BZX79-C16,113 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 consumer markets.

The BZX79 series belongs to Nexperia's legacy Zener diode product line, engineered for cost-sensitive, low-power voltage regulation and reference applications where stability, consistency, and through-hole manufacturability are prioritized.

FAQ

What is the maximum continuous power dissipation for BZX79-C16,113 at 70 °C ambient?

At 70 °C ambient, the device must be derated from its 500 mW rating at 50 °C. Using the thermal resistance R_{th j-a} = 380 K/W, the allowable power drops to approximately 395 mW to maintain T_j ≤ 200 °C. This requires calculating ΔT = 70 °C − 25 °C = 45 K, then applying P = (200 − 70) / 380 ≈ 342 mW for safety margin compliance per IEC 60134 limiting values.

Can BZX79-C16,113 be used in surface-mount designs?

No - BZX79-C16,113 uses an axial-leaded SOD27 (DO-35) glass package designed exclusively for through-hole mounting. It lacks solder pads or terminations compatible with reflow or wave soldering processes. For SMT equivalents, consider Nexperia's PMZ series or BZX384-C16 in SOD-323.

How does the +10.4 mV/K temperature coefficient affect circuit accuracy?

The +10.4 mV/K coefficient means V_Z increases by ~166 mV over a 16 K rise (e.g., 25 °C to 41 °C). In a 16 V reference, this yields ~1.04% drift over that range. Designers compensate by pairing with negative-coefficient devices or using temperature-insensitive topologies like bandgap-derived references when sub-0.1% stability is required.

Is the cathode marking visible on the actual component?

Yes - the cathode is unambiguously marked by a single black band near one end of the glass body. This band aligns with the cathode terminal in all official Nexperia documentation and matches industry-standard DO-35 polarity conventions. No additional orientation indicators are present.