Diodes Incorporated BZX84C3V0TA

Overview

BZX84C3V0TA from Diodes Incorporated is a 3.0 V, 350 mW surface-mount Zener diode in SOT23 package, designed for precision voltage regulation and reference in low-power analog circuits, with ±0.2 V tolerance at 5 mA test current, 95 Ω dynamic impedance, and -3.5 mV/°C temperature coefficient. It operates across -65°C to +150°C and supports automotive-grade reliability per AEC-Q101.

For engineers reviewing the BZX84C3V0TA datasheet, BZX84C3V0TA pinout, BZX84C3V0TA application, or BZX84C3V0TA equivalent, this page delivers verified electrical parameters, thermal derating behavior, SOT23 terminal mapping, and direct alternatives for voltage reference and overvoltage protection design.

Technical Context

This Zener diode uses planar die construction for stable breakdown characteristics and low leakage. Its 3.0 V nominal Zener voltage is specified at 5 mA test current (IZT), with maximum 0.2 V deviation (2.8–3.2 V range) and tightly controlled temperature coefficient of -3.5 mV/°C.

Thermal performance is defined by two power dissipation ratings: 350 mW under ambient-temperature terminal conditions, and 300 mW when mounted on FR-4 PCB with recommended pad layout. Junction-to-ambient thermal resistance is 357 °C/W (note 7) or 417 °C/W (note 6), directly impacting safe operating current under ambient temperature rise.

Key Specifications

Pinout & Package

Package: SOT23 - surface-mount, 3-terminal plastic package with matte tin-plated Alloy 42 leadframe; UL 94V-0 rated; moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5223BS-7-F and BZX84-C3V0,115, BZX84C3V0TA uniquely combines full AEC-Q101 qualification, 350 mW power handling, and -3.5 mV/°C TC in a single SOT23 device-making it optimal for automotive voltage references requiring both reliability and thermal stability.

Availability

BZX84C3V0TA is available at Aetrix Electronics and suitable for automotive cabin control systems, industrial sensor signal conditioning, and portable medical device voltage references requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for BZX84C3V0TA 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 consumer electronics.

FAQ

What is the maximum reverse current at 1.0 V for BZX84C3V0TA?

The maximum reverse current (IR) is 10 µA at VR = 1.0 V, measured at 25°C ambient. This low leakage ensures minimal loading on high-impedance reference nodes and preserves battery life in always-on sensor circuits. The value is guaranteed per DS18001 Rev. 33, page 2, Electrical Characteristics table.

Is BZX84C3V0TA suitable for automotive applications?

Yes - BZX84C3V0TA is qualified to AEC-Q101 standards, tested for high-reliability operation across -65°C to +150°C junction temperature, and manufactured with green molding compound. It is approved for use in engine control units, body electronics, and infotainment power rails per Diodes Incorporated's compliance documentation.

How does thermal derating affect its power dissipation?

At 25°C ambient, BZX84C3V0TA supports 350 mW when terminals are held at ambient temperature. When mounted on FR-4 PCB, power must be limited to 300 mW and linearly derated by 3.57 mW/°C above 25°C, reaching zero at ~112°C ambient - per Figure 1 in DS18001 Rev. 33.

What is the function of Pin 3 in the SOT23 package?

Pin 3 is a non-electrical terminal used for mechanical anchoring and internal die attach; it is not connected to the Zener die. In standard SOT23 layout, it serves as a heatsink tie-bar and provides structural integrity during reflow soldering - confirmed by Diodes' package outline drawing and pin identification diagram in DS18001.