Diodes Incorporated BZX84C2V7TA

Overview

BZX84C2V7TA from Diodes Incorporated is a 2.7 V, 350 mW surface-mount Zener diode in SOT23 package, rated for 5 mA test current with ±0.2 V tolerance (2.5–2.9 V), 100 Ω dynamic impedance at 5 mA, and −3.5 mV/°C temperature coefficient. It provides precise low-voltage reference and overvoltage clamping in power supply feedback loops and voltage regulation circuits.

For engineers reviewing the BZX84C2V7TA datasheet, BZX84C2V7TA pinout, BZX84C2V7TA application, or BZX84C2V7TA equivalent, key selection criteria include zener voltage accuracy at low current, thermal stability in compact PCB layouts, reverse leakage under bias, and compatibility with automated SMT assembly on FR-4 boards.

Technical Context

This Zener diode operates in reverse breakdown mode with a nominal zener voltage of 2.7 V at 5 mA test current and exhibits a negative temperature coefficient of −3.5 mV/°C, enabling predictable drift compensation in temperature-sensitive references. Its 100 Ω zener impedance at I_ZT and 600 Ω at knee current (I_ZK = 1 mA) define regulation stiffness across load variations.

Rated for 350 mW dissipation under ambient conditions with R_θJA = 357 °C/W, it supports stable operation up to +150 °C junction temperature. The device is qualified to AEC-Q101, confirming suitability for automotive-grade reliability requirements without derating below 125 °C ambient.

Key Specifications

Pinout & Package

Package: SOT23 - plastic molded case with matte tin-plated alloy 42 leadframe; UL 94V-0 rated; moisture sensitivity level 1 per J-STD-020; 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, BZX84C2V7TA offers +55% power margin and lower impedance for tighter regulation; versus BZX84-C2V7,115, it provides identical performance with Diodes Incorporated's green compound and extended date-code compliance history.

Availability

BZX84C2V7TA is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal conditioning, and consumer USB power delivery supervision requiring stable component supply and AEC-Q101 assurance.

Supply support for BZX84C2V7TA 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 and manufacturing operations across Asia and the Americas.

The BZX84 series belongs to Diodes' precision Zener reference product line, engineered for high-reliability voltage regulation and clamping in space-constrained, thermally demanding environments such as automotive ECUs and industrial PLCs.

FAQ

What is the maximum continuous reverse voltage that BZX84C2V7TA can withstand without breakdown?

The BZX84C2V7TA begins controlled reverse breakdown at its nominal zener voltage of 2.7 V, with guaranteed operation between 2.5 V and 2.9 V at 5 mA. It is not rated for continuous reverse blocking above this range - sustained voltage >2.9 V will cause increasing current flow and potential thermal runaway if power dissipation exceeds 350 mW. For blocking applications, a standard rectifier diode is required.

Does BZX84C2V7TA require a series current-limiting resistor in all applications?

Yes - a series resistor is mandatory to limit reverse current and prevent exceeding the 350 mW power rating. For example, at 5 mA test current and 2.7 V drop, the resistor must drop the remaining supply voltage while dissipating no more than 350 mW total. Typical designs use 1 kΩ to 10 kΩ depending on supply voltage and load current requirements.

How does the −3.5 mV/°C temperature coefficient affect long-term voltage stability?

The negative temperature coefficient means the zener voltage decreases by 3.5 mV per degree Celsius rise in junction temperature. Over a 100 °C range (−40 °C to +60 °C ambient), this results in ~350 mV total drift - a 13% shift relative to 2.7 V. Stable regulation requires either thermal isolation, compensation circuitry, or operation within narrow ambient bands.

Is BZX84C2V7TA suitable for ESD protection on high-speed data lines like USB or I²C?

No - BZX84C2V7TA is not designed for ESD protection. Its 100 Ω dynamic impedance and 20 µA leakage at 1 V are unsuitable for fast transient suppression. Dedicated TVS diodes (e.g., D3V3M1U2LP) offer sub-nanosecond response, lower clamping voltage, and higher peak pulse power - essential for data line integrity.