Nexperia USA Inc. BZX84W-C6V8F

Overview

BZX84W-C6V8F from Nexperia is a ±5 % tolerance Zener voltage regulator diode in SOT323 (SC-70) package, rated for 6.8 V nominal Zener voltage at 5 mA, 275 mW total power dissipation, and 2 µA reverse current at 4 V, used for precision voltage reference and local regulation in space-constrained analog and power management circuits.

For engineers reviewing the BZX84W-C6V8F datasheet, BZX84W-C6V8F pinout, BZX84W-C6V8F application, or BZX84W-C6V8F equivalent, this page delivers verified electrical parameters, thermal behavior, SOT323 terminal mapping, and real-world use cases for low-power voltage stabilization and overvoltage clamping.

Technical Context

This Zener diode operates in reverse breakdown to maintain stable 6.8 V output across load and line variations, with differential resistance of 80 Ω at 5 mA and temperature coefficient of +3.0 mV/K - enabling predictable drift compensation in mid-voltage references. Its 2 µA leakage at VR = 4 V supports low-quiescent-current biasing.

Designed for surface-mount assembly on FR4 PCBs with single-sided copper, it exhibits 455 K/W junction-to-ambient thermal resistance and withstands non-repetitive peak reverse power up to 40 W for 100 µs pulses, making it suitable for transient suppression in signal conditioning paths.

Key Specifications

Pinout & Package

SOT323 (SC-70) plastic surface-mounted package with 3 terminals, 1.35 mm body width, and 0.65 mm lead pitch; optimized for reflow soldering using standardized footprint per Figure 9.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84W-C6V8F, MMBZ5235BLT1G trades smaller size for higher impedance and thermal resistance, while BZX84-C6V8-TP offers improved regulation performance in the same footprint - making the latter ideal for upgrading existing designs requiring better stability.

Availability

BZX84W-C6V8F is available at Aetrix Electronics and suitable for power supply reference, overvoltage clamp, and current source bias applications requiring stable component supply, consistent parametric performance, and long-term SMT manufacturability.

Supply support for BZX84W-C6V8F 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 automotive-qualified and industrial-grade components.

BZX84W series belongs to Nexperia's general-purpose Zener diode product line, engineered for space-efficient voltage regulation and clamping in consumer, industrial, and computing applications where small size and parametric consistency are critical.

FAQ

What is the maximum continuous reverse current the BZX84W-C6V8F can handle?

The device supports up to 200 mA forward current (IF), but its Zener operation is specified at 5 mA test current. For continuous reverse (Zener) conduction, the limiting factor is power dissipation: at 6.8 V, maximum sustainable Zener current is ~40 mA (275 mW ÷ 6.8 V), assuming ambient temperature remains ≤25 °C and PCB thermal design meets FR4 single-sided copper conditions.

Does the n.c. pin on the SOT323 package require grounding or routing?

No - Pin 2 is internally not connected and must remain unconnected on the PCB. Routing or grounding it introduces risk of solder bridging, parasitic capacitance, or mechanical stress. The official Nexperia footprint (Figure 9) shows no pad or trace for Pin 2, confirming its isolation.

How does the +3.0 mV/K temperature coefficient affect regulation accuracy over temperature?

At 6.8 V nominal, +3.0 mV/K means V_Z increases by ~0.3 V over a 100 K rise (e.g., −25 °C to +75 °C). This yields ~4.4 % drift across that range. For applications needing tighter stability, pair with a negative-TC component or use in temperature-controlled zones where drift remains within system tolerance.

Can BZX84W-C6V8F be used for ESD protection on high-speed data lines?

No - its 200 pF diode capacitance (at 1 MHz, VR = 0 V) and 100 ns typical response time make it unsuitable for USB, HDMI, or Ethernet lines. It is intended for low-frequency clamping (e.g., power rails, GPIO, sensor bias) where bandwidth >10 MHz is not required. Use dedicated TVS diodes like PESD5V0S1BA for high-speed ESD protection.