onsemi BZX84C6V2LT3

Overview

BZX84C6V2LT3 from onsemi is a 6.2 V, ±5% tolerance Zener diode in SOT-23 package, rated for 225 mW power dissipation at 25°C on FR-5 board, with 10 Ω dynamic impedance at 5 mA test current and 6 µA reverse leakage at 4.7 V. It serves as a precision voltage reference or overvoltage clamp in low-power portable electronics.

For engineers reviewing the BZX84C6V2LT3 datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage (6.2 V), tolerance (±5%), thermal resistance (556 °C/W), ESD rating (>16 kV HBM), and SOT-23 footprint compatibility with high-density PCB layouts.

Technical Context

This device operates in reverse breakdown to maintain stable voltage across its cathode-anode terminals under varying load or supply conditions. Its Zener voltage is specified at three test currents (1 mA, 5 mA, 20 mA), with temperature coefficient of +0.4 mV/°C enabling predictable drift compensation in ambient ranges from −65°C to +150°C.

The SOT-23 package features a no-connect terminal (Pin 2), allowing mechanical stability without electrical function. With 185 pF capacitance at 0 V bias and 1 MHz, it supports moderate-speed transient suppression while minimizing signal coupling in mixed-signal circuits.

Key Specifications

Pinout & Package

SOT-23 plastic surface-mount package (Case 318, Style 8), void-free thermosetting material, UL 94 V-0 flammability rating, cathode indicated by band.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84C6V2LT3, the LT1 variant offers identical performance in smaller packaging for flexibility, while the B-series variant trades cost for ±1% tolerance-critical where reference stability dominates BOM cost considerations.

Availability

BZX84C6V2LT3 is available at Aetrix Electronics and suitable for portable power management, signal-level clamping, and automotive body control requiring stable component supply with consistent SOT-23 footprint and Zener voltage performance.

Supply support for BZX84C6V2LT3 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud, and consumer markets.

The BZX84 series is designed for compact, low-power voltage regulation and transient suppression in space-constrained portable and embedded systems, emphasizing SOT-23 manufacturability and high-volume reliability.

FAQ

What is the Zener voltage tolerance of BZX84C6V2LT3?

The BZX84C6V2LT3 has a standard tolerance of ±5%, meaning its Zener voltage is guaranteed between 5.8 V and 6.6 V when tested at 5 mA (IZT). This tolerance is confirmed in the Electrical Characteristics table on page 3 of the official datasheet, where min/nom/max values are explicitly listed as 5.8/6.2/6.6 V. The "C" suffix in the part number denotes this standard tolerance grade, distinguishing it from the tighter ±1% "B" series variants like BZX84B6V2LT1.

Does BZX84C6V2LT3 have a functional third pin?

No, Pin 2 of the BZX84C6V2LT3 is a no-connect terminal, as confirmed in the Mechanical Characteristics section and Pinout diagrams on pages 2 and 7 of the datasheet. It serves only as a mechanical support structure within the SOT-23 package and must remain unconnected in PCB layout. The active terminals are Pin 1 (Anode) and Pin 3 (Cathode), with polarity marked by a band adjacent to Pin 3.

What is the maximum power dissipation of BZX84C6V2LT3 on standard PCB material?

The BZX84C6V2LT3 is rated for 225 mW total power dissipation on FR-5 board at 25°C ambient, with thermal resistance of 556 °C/W junction-to-ambient. This value is specified in the Maximum Ratings table under "Total Power Dissipation on FR−5 Board" and applies only when mounted on standard 1.0 × 0.75 × 0.62 inch FR-5 substrate. Derating begins above 25°C at 1.8 mW/°C, limiting usable power at elevated temperatures.

How does the temperature coefficient affect BZX84C6V2LT3 performance?

The BZX84C6V2LT3 has a positive temperature coefficient of +0.4 mV/°C at 5 mA, meaning its Zener voltage increases by approximately 0.4 mV for each degree Celsius rise in junction temperature. This behavior is documented in the Electrical Characteristics table and Typical Characteristics Figure 1. For example, over a −40°C to +85°C ambient range, the voltage shift is roughly ±50 mV - a design consideration for applications requiring tight regulation across wide temperature spans.

Is BZX84C6V2LT3 RoHS compliant and lead-free?

Yes, the BZX84C6V2LT3 is RoHS compliant and available in lead-free form, as indicated by the "G" suffix option (e.g., BZX84C6V2LT1G). While the base part number lacks the "G", onsemi's packaging specification confirms Pb-free construction is standard for current production lots unless otherwise ordered. The datasheet states "Pb−Free Packages are Available" in Specification Features and notes the "G" suffix explicitly denotes Pb-free compliance per J-STD-609.