Diodes Incorporated BZX84C2V7W-7

Overview

BZX84C2V7W-7 from Diodes Incorporated is a 2.7 V, 200 mW surface-mount Zener diode in SOT-323 package, rated for 5 mA test current with 100 Ω dynamic impedance at 1 kHz, ±0.2 V zener voltage tolerance, and reverse leakage of 20 µA at 1.0 V. It provides precision voltage reference and overvoltage protection in low-power analog signal conditioning circuits.

For engineers reviewing the BZX84C2V7W-7 datasheet, BZX84C2V7W-7 pinout, BZX84C2V7W-7 application, or BZX84C2V7W-7 equivalent, key selection criteria include zener voltage accuracy at 5 mA, thermal resistance (625 K/W), ultra-small footprint compatibility with high-density PCB layouts, and RoHS-compliant matte tin plating on Alloy 42 leadframe.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load or supply conditions. Its planar die construction ensures consistent breakdown characteristics and low leakage, while the SOT-323 package enables thermal dissipation up to 200 mW at 25°C ambient with defined derating above 30°C.

The device exhibits a temperature coefficient of –3.5 to 0 mV/°C at 5 mA, indicating minimal drift over temperature for low-voltage references. Its 100 Ω zener impedance at 1 kHz supports stable regulation in feedback paths of LDOs and sensor bias networks where AC ripple rejection matters.

Key Specifications

Pinout & Package

Package: SOT-323 - ultra-small 3-pin surface-mount plastic case (2.2 mm × 1.35 mm × 0.9 mm), moisture sensitivity level 1, UL 94V-0 rated, lead-free matte tin finish on Alloy 42 leadframe.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5223BS-7-F and BZX84-B2V7, the BZX84C2V7W-7 offers optimal balance of ultra-low leakage (20 µA), industry-standard SOT-323 compatibility, and proven reliability in high-volume consumer electronics - making it preferred for space-constrained, low-quiescent designs.

Availability

BZX84C2V7W-7 is available at Aetrix Electronics and suitable for portable sensor biasing, low-voltage rail monitoring, and USB-C interface protection requiring stable component supply and full traceability.

Supply support for BZX84C2V7W-7 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 China, Taiwan, and the US.

The BZX84 series belongs to Diodes' precision Zener diode product line, engineered specifically for voltage regulation, reference, and overvoltage protection in compact, cost-sensitive consumer and industrial electronics.

FAQ

What is the maximum continuous zener current for BZX84C2V7W-7 at 25°C ambient?

The device is rated for 200 mW total power dissipation. At 2.7 V zener voltage, this corresponds to a maximum continuous current of approximately 74 mA (200 mW ÷ 2.7 V). Derating begins above 30°C ambient per Figure 1, reducing usable current linearly to zero at ~155°C junction temperature.

Is BZX84C2V7W-7 suitable for ESD protection in USB data lines?

No - it is not designed or characterized for ESD clamping. Its 200 mW rating and 100 Ω impedance are optimized for steady-state voltage regulation, not transient suppression. For USB data line protection, use dedicated TVS diodes like D3V3M1U2SOT-7-F with sub-nanosecond response and IEC 61000-4-2 certification.

Does the SOT-323 package include a thermal pad, and should it be soldered?

The SOT-323 package has three terminals: anode (Pin 1), cathode (Pin 2), and an internal non-connected die attach pad (Pin 3). Pin 3 is electrically isolated and must remain unconnected unless explicitly designated as thermal pad in a variant datasheet - which is not the case here. Soldering it provides no thermal benefit and risks shorting.

How does the temperature coefficient affect performance in a 0–50°C operating range?

With a coefficient of –3.5 to 0 mV/°C, the zener voltage may decrease by up to 175 mV (–3.5 mV/°C × 50°C) relative to its 25°C value. For a 2.7 V nominal device, this represents a worst-case shift of ~6.5%, meaning actual voltage could range from ~2.53 V to 2.7 V across that span - acceptable for non-critical biasing but insufficient for precision references.