Diodes Incorporated BZX84B6V8-7-F

Overview

BZX84B6V8-7-F from Diodes Incorporated is a precision 6.8 V ±2% tolerance Zener diode in SOT23 package, rated for 350 mW power dissipation at 25°C ambient, with 15 Ω dynamic impedance at 5 mA test current and 2.0 µA maximum reverse leakage at 4.0 V. It serves as a stable voltage reference or overvoltage clamp in low-power analog circuits and power supply feedback paths.

For engineers reviewing the BZX84B6V8-7-F datasheet, BZX84B6V8-7-F pinout, BZX84B6V8-7-F application, or BZX84B6V8-7-F equivalent, key selection criteria include its tight 2% Zener voltage tolerance, low 15 Ω Zener impedance at I_ZT = 5 mA, AEC-Q101 qualification for automotive use, and SOT23 footprint compatibility with high-volume automated assembly.

Technical Context

This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to maintain a stable 6.66–6.94 V output across a 1–20 mA operating range. Its temperature coefficient of +4.5 mV/°C indicates positive drift above 25°C, requiring thermal compensation in precision references.

The SOT23 package enables surface-mount integration with 357 °C/W junction-to-ambient thermal resistance under ideal heatsinking conditions, and its 0.008 g mass supports reflow compatibility per J-STD-020 Level 1 moisture sensitivity classification.

Key Specifications

Pinout & Package

Package: SOT23 - molded plastic case with matte tin-plated terminals, UL 94V-0 flammability rating, and 0.008 g typical weight. Polarity marked by cathode band on top surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMSZ4688-7-F and BZX84-C6V8, BZX84B6V8-7-F delivers tighter voltage control and automotive reliability at the expense of higher unit cost and lower power headroom-making it optimal for safety-critical or high-accuracy analog subsystems.

Availability

BZX84B6V8-7-F is available at Aetrix Electronics and suitable for automotive sensor biasing, industrial power supply feedback, and medical instrument reference applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for BZX84B6V8-7-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 centers across Asia and manufacturing facilities in China, Taiwan, and the U.S.

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

FAQ

What is the maximum reverse voltage this Zener can sustain before breakdown?

The BZX84B6V8-7-F has a nominal Zener voltage of 6.8 V with a guaranteed range of 6.66–6.94 V at 5 mA test current. It begins controlled reverse conduction within this band and is not rated for sustained operation above 6.94 V without exceeding specified power limits or thermal constraints.

Is this part suitable for use in automotive ECUs?

Yes - BZX84B6V8-7-F is explicitly qualified to AEC-Q101 standards, including stress tests for temperature cycling, high-temperature reverse bias, and humidity resistance, making it approved for use in engine control units, body control modules, and ADAS sensor interfaces.

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

This positive temperature coefficient means the Zener voltage increases by approximately 4.5 mV per degree Celsius rise above 25°C. In precision references, this requires either thermal compensation in analog design or software correction in digitally monitored systems to maintain sub-0.1% accuracy over wide temperature ranges.

Can this diode replace older BZX84C6V8 parts in existing designs?

Yes, with caveats: BZX84B6V8-7-F offers tighter ±2% tolerance versus ±5% for the 'C' version and adds AEC-Q101 qualification. Electrical and mechanical compatibility is maintained in SOT23, but designers must verify that the improved stability does not alter loop dynamics in feedback circuits.