Diodes Incorporated BZX84B3V0-7-F

Overview

BZX84B3V0-7-F from Diodes Incorporated is a precision 3.0 V ±2% tolerance Zener diode in SOT23 package, rated for 350 mW power dissipation at 25°C ambient, with 95 Ω dynamic impedance at 5 mA test current and 10 µA maximum reverse leakage at 1.0 V. It serves as a stable voltage reference or overvoltage clamp in low-power analog signal conditioning and power rail monitoring circuits.

For engineers reviewing the BZX84B3V0-7-F datasheet, BZX84B3V0-7-F pinout, BZX84B3V0-7-F application, or BZX84B3V0-7-F equivalent, key selection factors include its tight 2% Zener voltage 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 to maintain a stable 3.0 V reference across load variations, with nominal test current of 5 mA and knee current of 1.0 mA. Its temperature coefficient is -3.5 mV/°C near 3 V, enabling predictable drift compensation in temperature-sensitive references.

The device uses alloy-42 leadframe with matte tin plating and green molding compound (UL 94V-0), achieving moisture sensitivity level 1 per J-STD-020 and full RoHS 3 compliance with <900 ppm bromine/chlorine and <1000 ppm antimony.

Key Specifications

Pinout & Package

Package: SOT23 - molded plastic case with matte tin-plated alloy-42 leadframe; dimensions per JEDEC TO-236AB; weight ≈ 0.008 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5223BS-7-F and BZX84-C3V0, BZX84B3V0-7-F delivers superior voltage stability (±2% vs. ±5%), lower dynamic impedance (95 Ω vs. ≥225 Ω), and verified automotive reliability-making it the preferred choice for safety-aware or high-accuracy analog subsystems.

Availability

BZX84B3V0-7-F is available at Aetrix Electronics and suitable for automotive body control units, industrial 4–20 mA sensor transmitters, USB-C power delivery monitors, and medical wearable battery management systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BZX84B3V0-7-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 in Taiwan and China.

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

FAQ

What is the maximum power dissipation for BZX84B3V0-7-F at 85°C ambient?

At 85°C ambient, the device's power dissipation must be derated linearly from 350 mW at 25°C using the 357 °C/W thermal resistance. The allowable power is calculated as (150°C − 85°C) / 357 °C/W = 182 mW, ensuring junction temperature remains below the 150°C absolute maximum rating.

Is BZX84B3V0-7-F suitable for bidirectional ESD protection?

No - this is a unidirectional Zener diode optimized for reverse-bias voltage regulation. Its forward voltage is 0.9 V at 10 mA, but it lacks symmetric clamping characteristics or specified ESD ratings (e.g., IEC 61000-4-2), making it unsuitable as a dedicated ESD suppressor.

How does the -7-F suffix affect packaging and reliability?

The -7-F suffix indicates 3000-unit tape-and-reel packaging with lead-free, halogen-free "Green" construction. It confirms compliance with RoHS 3 and AEC-Q101, distinguishing it from non-automotive variants like -13-F (10,000/reel) or Q-suffixed automotive versions with identical electrical specs but enhanced traceability.

Can BZX84B3V0-7-F replace a 3.3 V Zener in an existing design?

No - its nominal 3.0 V rating differs from 3.3 V by 90 mV, exceeding typical tolerance margins in precision references. Substituting it would shift regulation point, potentially causing undervoltage lockout or ADC reference errors; use BZX84B3V3-7-F instead for 3.3 V applications.