Diodes Incorporated BZX84C13-7-F

Overview

BZX84C13-7-F from Diodes Incorporated is a 350mW surface-mount Zener diode with a nominal zener voltage of 13V (12.4–14.1V range at 5mA test current), 30Ω maximum zener impedance at 5mA, and 0.1µA maximum reverse leakage at 11V. It uses planar die construction in SOT23 package and is RoHS-compliant, halogen-free, and AEC-Q101 qualified for automotive-grade reliability. It serves as a precision voltage reference or overvoltage clamp in low-power DC rails.

For engineers reviewing the BZX84C13-7-F datasheet, BZX84C13-7-F pinout, BZX84C13-7-F application, or BZX84C13-7-F equivalent, key selection criteria include zener voltage tolerance, dynamic impedance at operating current, thermal resistance (357°C/W), power derating above +25°C, and compatibility with automated SMT assembly on FR-4 PCBs.

Technical Context

This Zener diode operates in reverse breakdown to maintain stable voltage regulation across varying load currents. Its 13V nominal zener voltage is specified at 5mA test current, with temperature coefficient of +7.0mV/°C - indicating positive drift with rising junction temperature. The device exhibits low capacitance (<2pF typical at 1V reverse bias) and fast response to transient overvoltage events.

Designed for surface-mount applications, it delivers consistent regulation under pulsed conditions (short-duration test to minimize self-heating). Its SOT23 package supports high-density layouts while maintaining thermal performance up to +150°C junction temperature, with derating beginning at +70°C ambient per the published curve.

Key Specifications

Pinout & Package

Package: SOT23 - molded plastic case, UL 94V-0 rated, 0.008g weight, matte tin-plated alloy 42 leadframe, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84C13-7-F, MMBZ5243B-7-F trades 150mW headroom for broader distributor availability, while BZX84-C13,115 offers identical packaging and power but requires verification of long-term stability under cyclic thermal stress in engine bay environments.

Availability

BZX84C13-7-F is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, and portable medical device power management requiring stable component supply and AEC-Q101 compliance.

Supply support for BZX84C13-7-F 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.

This device belongs to the BZX84C series of precision Zener diodes engineered for high-reliability voltage regulation in automotive, industrial, and consumer applications where compact size and environmental compliance are critical.

FAQ

What is the maximum continuous zener current for BZX84C13-7-F at +70°C ambient?

At +70°C ambient, the device's power dissipation must be derated to 250mW per the published curve. With a nominal 13V zener voltage, the maximum continuous zener current is approximately 19.2mA (250mW ÷ 13V), assuming negligible forward drop and no additional thermal resistance from PCB layout.

Does BZX84C13-7-F support reflow soldering per JEDEC J-STD-020?

Yes - the SOT23 package and matte tin finish meet JEDEC J-STD-020 requirements for moisture sensitivity level 1, allowing standard Pb-free reflow profiles (peak 260°C, 20–40 sec above 217°C) without preconditioning or baking.

How does the +7.0mV/°C temperature coefficient affect regulation accuracy over –40°C to +125°C?

Over that range, the zener voltage shifts by up to ±1.16V (165°C × 7.0mV/°C), resulting in a total span of ~11.84V to 14.16V. For precision references, this requires compensation in system-level calibration or use with temperature-stable feedback networks.

Is Pin 3 truly non-functional, or does it serve a thermal role in the SOT23 package?

Pin 3 is electrically unconnected per the internal schematic and die layout. While it contributes marginally to thermal mass, its primary role is mechanical stabilization - thermal performance relies on Pins 1 and 2, which are the sole current-carrying terminals and thermal paths to the PCB.