Nexperia USA Inc. BZX84W-C2V4F

Overview

BZX84W-C2V4F from Nexperia is a ±5% tolerance Zener voltage regulator diode in SOT323 (SC-70) package, rated for 2.4 V nominal Zener voltage at 5 mA, 275 mW total power dissipation, and 150 °C maximum junction temperature. It serves as a precision reference or low-power voltage clamp in signal conditioning, power supply feedback, and overvoltage protection circuits.

For engineers reviewing the BZX84W-C2V4F datasheet, BZX84W-C2V4F pinout, BZX84W-C2V4F application, or BZX84W-C2V4F equivalent, key selection criteria include Zener voltage tolerance (±5%), differential resistance (600 Ω at I_Z = 1 mA), reverse leakage (50 µA at V_R = 1 V), thermal resistance (455 K/W), and SOT323 footprint compatibility with high-density PCB layouts.

Technical Context

This Zener diode operates in reverse breakdown to maintain stable voltage regulation across load and line variations. Its 2.4 V nominal Zener voltage is specified at I_Z = 5 mA with ±5% tolerance, and exhibits a negative temperature coefficient of −1.6 mV/K at that current, enabling predictable drift behavior in temperature-sensitive designs.

The device features a 600 Ω differential resistance at 1 mA test current, confirming moderate regulation stiffness for low-current applications, and supports non-repetitive peak reverse power dissipation up to 40 W for surge suppression when pulse width ≤100 µs and duty cycle ≤0.02.

Key Specifications

Pinout & Package

Package: SOT323 (SC-70), leadless surface-mount plastic package with 3 terminals, 1.3 mm × 1.8 mm footprint, 0.65 mm pitch, and 0.45 mm max height - optimized for automated placement and reflow soldering in space-constrained designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5221BS, BZX84W-C2V4F offers smaller size and lower cost but trades 75 mW power headroom and higher dynamic impedance; versus BZX84-C2V4, it delivers identical regulation performance in 45% less board area, enabling next-generation compact designs.

Availability

BZX84W-C2V4F is available at Aetrix Electronics and suitable for power supply feedback, signal level clamping, overvoltage protection, and reference voltage generation requiring stable component supply across automotive infotainment, industrial sensor nodes, and consumer IoT edge devices.

Supply support for BZX84W-C2V4F 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

Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, with leadership in advanced packaging and automotive-qualified components.

The BZX84W series belongs to Nexperia's general-purpose Zener diode product line, engineered for cost-sensitive, space-constrained applications demanding stable voltage regulation across commercial and industrial temperature ranges.

FAQ

What is the maximum continuous reverse current this diode can handle at 2.4 V?

The BZX84W-C2V4F does not specify a maximum continuous reverse current at exactly 2.4 V, as Zener operation occurs above its nominal voltage. At V_R = 1 V (below breakdown), reverse leakage is limited to 50 µA. Continuous reverse current is governed by power dissipation: at 2.4 V, maximum safe DC current is 114 mA (275 mW ÷ 2.4 V), constrained by thermal limits and derating above 25 °C ambient.

Can this Zener diode replace a 2.4 V TL431-based shunt regulator?

No - the BZX84W-C2V4F is a passive two-terminal Zener diode, while the TL431 is an active three-terminal adjustable shunt regulator with 2.5 V reference, programmable output, and higher accuracy (±0.5%). The Zener lacks internal amplification, current gain, or feedback control, making it unsuitable for precision regulation or variable output applications where TL431 is used.

Is the n.c. pin (pin 2) electrically isolated or internally tied to substrate?

Pin 2 is explicitly designated "not connected" in Nexperia's official pinning information and graphic symbol. It is electrically isolated from all internal die structures and must remain unconnected on the PCB. No internal tie to substrate, anode, or cathode exists - confirmed by package cross-section diagrams and functional testing in the datasheet.

How does the −1.6 mV/K temperature coefficient affect long-term voltage stability?

A −1.6 mV/K coefficient means the Zener voltage decreases by 1.6 mV per Kelvin rise in junction temperature. Over a 100 °C range (−55 °C to +45 °C), this produces a total shift of −160 mV, or −6.7% of 2.4 V. For applications requiring <±1% stability, active compensation or temperature-limited operation is necessary; for coarse thresholds, this drift remains acceptable.