Diodes Incorporated BZX84B10-7-F

Overview

BZX84B10-7-F from Diodes Incorporated is a precision 10 V ±2% Zener diode in SOT23 package, rated for 350 mW power dissipation at 25°C ambient, with 20 Ω maximum Zener impedance at 5 mA test current and 0.2 µA maximum reverse leakage at 7.0 V. It serves as a stable voltage reference or overvoltage clamp in low-power analog and digital supply regulation circuits.

For engineers reviewing the BZX84B10-7-F datasheet, BZX84B10-7-F pinout, BZX84B10-7-F application, or BZX84B10-7-F equivalent, key selection criteria include its tight 2% Zener tolerance, AEC-Q101 qualification for automotive use, SOT23 surface-mount compatibility with automated assembly, and thermal resistance of 357 °C/W under lead-free soldering conditions.

Technical Context

This Zener diode operates in reverse breakdown mode with a nominal Zener voltage of 10.0 V at 5.0 mA test current (IZT), exhibiting a temperature coefficient of +4.5 mV/°C - indicating positive drift above 25°C. Its low 20 Ω dynamic impedance (ZZT) ensures minimal output voltage variation under load transients.

The device is characterized for stable operation across –65°C to +150°C junction temperature range, with 350 mW absolute maximum power dissipation when terminals are held at ambient temperature, and derates linearly to zero at 150°C per the published power derating curve.

Key Specifications

Pinout & Package

Package: SOT23 - plastic molded case with matte tin-plated alloy 42 leadframe, UL 94V-0 flammability rating, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMSZ4686-7-F and BZX84-C10, BZX84B10-7-F delivers superior initial accuracy (±2% vs. ±5%), automotive-grade reliability, and lower dynamic impedance - making it optimal for safety-critical or high-stability reference roles where long-term calibration integrity matters.

Availability

BZX84B10-7-F is available at Aetrix Electronics and suitable for automotive sensor biasing, industrial analog reference generation, and USB-C power negotiation clamping requiring stable component supply and full traceability.

Supply support for BZX84B10-7-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, manufacturing, and sales operations across Asia, Europe, and North America.

The BZX84 series belongs to Diodes' precision Zener diode product line, engineered specifically for stable voltage reference and overvoltage protection in space-constrained, high-reliability applications including automotive, industrial, and communications systems.

FAQ

What is the maximum reverse voltage (VR) this Zener can withstand before breakdown?

The BZX84B10-7-F has a nominal Zener voltage of 10.0 V at 5 mA test current, with guaranteed breakdown occurring between 9.8 V and 10.2 V. It is not rated for reverse blocking above its specified VZ range - applying >10.2 V continuously will sustain conduction, and exceeding 350 mW power dissipation risks thermal failure.

Does this part support reflow soldering with lead-free processes?

Yes - BZX84B10-7-F features matte tin-plated terminals qualified for Pb-free reflow per JEDEC J-STD-020, with peak temperature tolerance up to 260°C for 10 seconds. Its SOT23 package and green molding compound are fully compatible with standard IPC-7095-compliant assembly lines.

How does the +4.5 mV/°C temperature coefficient affect circuit performance?

This coefficient means the Zener voltage increases by approximately 4.5 mV per degree Celsius rise above 25°C. Over a 100°C span (25°C to 125°C), VZ shifts +450 mV - a +4.5% change. Designers must account for this in high-accuracy references, either via compensation networks or by limiting operating temperature range.

Is Pin 3 electrically functional or a thermal pad only?

Pin 3 is an internal die attach pad with no electrical connection to the semiconductor junction. It serves solely as a mechanical anchor and minor thermal conduction path to the PCB. No external circuit connection is required or recommended - leaving it unconnected or grounded for thermal enhancement is acceptable per Diodes Incorporated's layout guidelines.