Diodes Incorporated BZX84B7V5Q-7-F

Overview

BZX84B7V5Q-7-F from Diodes Incorporated is an AEC-Q101-qualified, ±2% tolerance, 7.5 V precision Zener diode in SOT23 package, rated for 350 mW power dissipation at ambient temperature and featuring 15 Ω typical Zener impedance at 5 mA test current. It operates across –65°C to +150°C and is used for voltage regulation and reference in automotive body control modules, sensor biasing circuits, and power supply feedback networks.

For engineers reviewing the BZX84B7V5Q-7-F datasheet, BZX84B7V5Q-7-F pinout, BZX84B7V5Q-7-F application, or BZX84B7V5Q-7-F equivalent, key selection criteria include its automotive qualification, tight 7.35–7.65 V Zener voltage range at 5 mA, low 15 Ω dynamic impedance, thermal resistance of 357 °C/W, and compatibility with automated SMT assembly on FR-4 PCBs.

Technical Context

This Zener diode functions as a two-terminal voltage reference device, operating in reverse breakdown mode with a nominal 7.5 V regulation point at 5 mA. Its temperature coefficient of +2.5 mV/°C ensures predictable drift over temperature, and it maintains stable regulation down to 1 mA minimum reverse current.

The device uses alloy-42 leadframe with matte tin plating, meets J-STD-020 Level 1 moisture sensitivity, and achieves 0.008 g mass with UL 94V-0 molded plastic housing - all supporting high-reliability automotive deployment where thermal stability and solder joint integrity are critical.

Key Specifications

Pinout & Package

Package: SOT23 - surface-mount, 3-terminal plastic case with 0.008 g mass, UL 94V-0 flammability rating, and J-STD-020 Level 1 moisture sensitivity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5236BS-7-F and BZX84-C7V5-7-F, BZX84B7V5Q-7-F delivers tighter voltage control, lower impedance, and certified automotive robustness - making it the only choice for safety-critical or high-temperature deployed systems requiring guaranteed parametric stability.

Availability

BZX84B7V5Q-7-F is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, USB-C protection circuits, and smart meter supervisory functions requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BZX84B7V5Q-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 semiconductor company specializing in discrete, analog, and mixed-signal devices, with design and manufacturing operations across Asia and the Americas.

The BZX84B series belongs to Diodes' AEC-Q101-qualified Zener portfolio, engineered specifically for automotive voltage reference and regulation tasks demanding high precision, thermal resilience, and long-term reliability in harsh environments.

FAQ

What is the maximum steady-state power dissipation for BZX84B7V5Q-7-F?

The device is rated for 350 mW power dissipation when terminals are maintained at ambient temperature, per Note 6 in the datasheet. Derating begins above 25°C ambient, reaching 0 mW at 150°C, following the linear curve in Figure 1. This rating assumes no heatsinking and standard FR-4 PCB mounting with recommended pad layout.

Does BZX84B7V5Q-7-F support reflow soldering per J-STD-020?

Yes - it is qualified to J-STD-020 Level 1 moisture sensitivity, meaning it may be stored indefinitely at ≤30°C/60% RH and subjected to standard Pb-free reflow profiles (peak 260°C) without baking. The matte tin finish and SOT23 geometry ensure reliable wetting and coplanarity during automated assembly.

How does the +2.5 mV/°C temperature coefficient affect regulation accuracy?

Over a 100°C span (–40°C to +60°C), the Zener voltage shifts by ±0.25 V - i.e., from 7.25 V to 7.75 V. This is fully characterized and repeatable; designers compensate by selecting adjacent resistor ratios in feedback networks or using it intentionally in temperature-compensated references.

Can BZX84B7V5Q-7-F replace BZX84-C7V5-7-F in existing designs?

Yes, mechanically and electrically - same SOT23 footprint, identical pinout, and compatible biasing. However, the Q-grade part adds AEC-Q101 qualification, ±2% tolerance, and lower leakage (1 µA vs. 5 µA), so replacement improves performance and compliance without layout change - provided automotive or extended-temp operation is intended.