Diodes Incorporated BZX84B10Q-7-F

Overview

BZX84B10Q-7-F from Diodes Incorporated is an AEC-Q101-qualified, ±2% tolerance precision Zener diode in SOT23 package, rated for 350 mW power dissipation and 10 V nominal zener voltage at 5 mA test current, with 20 Ω maximum zener impedance at I_ZT and 0.2 µA maximum reverse leakage at 7.0 V. It serves as a stable voltage reference in automotive power rail monitoring and sensor biasing circuits.

For engineers reviewing the BZX84B10Q-7-F datasheet, BZX84B10Q-7-F pinout, BZX84B10Q-7-F application, or BZX84B10Q-7-F equivalent, key selection criteria include its automotive qualification, tight 10 V ±2% tolerance, low 20 Ω dynamic impedance, temperature coefficient of +4.5 mV/°C, and SOT23 footprint compatibility with high-volume automated assembly.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain a stable 10 V reference under regulated current conditions. Its 20 Ω zener impedance at 5 mA ensures minimal voltage variation across load changes, while the +4.5 mV/°C temperature coefficient enables predictable drift compensation in temperature-sensitive designs.

The device is constructed using planar epitaxial process technology and features a fully lead-free, halogen- and antimony-free "Green" molding compound compliant with AEC-Q101 stress testing. Thermal resistance is 357 °C/W when terminals are held at ambient, supporting reliable operation up to +150 °C junction temperature.

Key Specifications

Pinout & Package

Package: SOT23 - three-terminal plastic surface-mount package with gull-wing leads, 0.008 g mass, UL 94V-0 flammability rating, and moisture sensitivity level 1 per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMSZ4701T1G and BZX84-C10LT1G, BZX84B10Q-7-F uniquely combines AEC-Q101 qualification, ±2% tolerance, and SOT23 compatibility-making it the only choice for automotive voltage reference designs requiring both precision and reliability assurance.

Availability

BZX84B10Q-7-F is available at Aetrix Electronics and suitable for automotive power management, industrial sensor conditioning, and medical analog signal chains requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for BZX84B10Q-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.

BZX84B series belongs to Diodes' precision Zener diode product line, engineered specifically for automotive and industrial applications demanding tight voltage tolerance, high reliability, and full regulatory compliance.

FAQ

What is the maximum reverse voltage (V_R) that BZX84B10Q-7-F can withstand before breakdown?

The device exhibits a sharp, well-defined reverse breakdown at 10 V ±2% when tested at 5 mA. Its absolute maximum reverse voltage is not specified separately; operation above 10.2 V will cause increasing reverse current per the zener I-V curve, with power dissipation limited to 350 mW. Exceeding this power limit risks thermal runaway.

Is BZX84B10Q-7-F suitable for use in a 5 V logic circuit as a clamp diode?

No - BZX84B10Q-7-F is a 10 V Zener and is not intended for 5 V rail clamping. Its 10 V breakdown voltage exceeds typical 5 V logic tolerances, and forward voltage is ~0.9 V, making it unsuitable as a standard clamp. For 5 V protection, a 5.1 V Zener such as BZX84B5V1Q-7-F is appropriate.

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

Over a –40°C to +125°C range (165°C delta), the coefficient contributes ±743 mV total drift (165 × 4.5). However, since V_Z = 10.0 V, this represents ±7.4% full-scale drift. In practice, the device is used with current regulation and often paired with TC-compensated circuits or trimmed in production to meet system-level accuracy targets.

Can BZX84B10Q-7-F replace BZX84C10LT1G in an existing design?

Yes, electrically and physically - both are SOT23-packaged 10 V Zeners. However, BZX84B10Q-7-F offers ±2% tolerance (vs. ±5%), AEC-Q101 qualification, and tighter Z_ZT (20 Ω vs. 30 Ω). Replacement requires verifying that tighter tolerance doesn't disrupt existing bias point tuning and that automotive qualification aligns with end-equipment requirements.