Nexperia USA Inc. BZX84W-B62-QF

Overview

BZX84W-B62-QF from Nexperia is a ±2% tolerance Zener voltage regulator diode in SOT323 (SC-70) package, rated for 62 V nominal Zener voltage at 5 mA, 275 mW total power dissipation, and qualified to AEC-Q101 for automotive use. It provides stable voltage reference in power supply feedback loops, overvoltage protection circuits, and precision biasing networks.

For engineers reviewing the BZX84W-B62-QF datasheet, BZX84W-B62-QF pinout, BZX84W-B62-QF application, or BZX84W-B62-QF equivalent, key selection criteria include Zener voltage tolerance (±2%), differential resistance (150 Ω at 5 mA), temperature coefficient (+64.4 mV/K), junction-to-ambient thermal resistance (455 K/W), and automotive qualification status.

Technical Context

This Zener diode operates in reverse breakdown mode with a nominal 62 V regulation voltage at I_Z = 5 mA, exhibiting a positive temperature coefficient of +64.4 mV/K-critical for temperature-stable reference designs where drift compensation is required. Its low differential resistance (150 Ω) ensures minimal output impedance under varying load conditions.

The device uses a planar epitaxial silicon process, housed in a leadless SOT323 package with an anode, cathode, and no-connect terminal. It supports non-repetitive peak reverse power dissipation up to 40 W for 100 µs pulses and is rated for operation from −55 °C to +150 °C ambient temperature.

Key Specifications

Pinout & Package

SOT323 (SC-70) surface-mount plastic package: 1.3 mm × 2.2 mm footprint, 0.95 mm height, leadless construction with tin-plated terminations compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84W-B62-QF, the C62-Q variant trades tighter voltage control for broader tolerance and slightly higher impedance, while MMSZ5259B-TP offers similar regulation but lacks automotive qualification and thermal robustness-making BZX84W-B62-QF the sole choice for AEC-compliant 62 V reference designs.

Availability

BZX84W-B62-QF is available at Aetrix Electronics and suitable for automotive ECU voltage reference, industrial sensor biasing, power supply overvoltage protection, and telecom line interface clamping requiring stable component supply and AEC-Q101 compliance.

Supply support for BZX84W-B62-QF 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 delivering high-performance logic, discrete, and MOSFET devices with focus on efficiency, reliability, and miniaturization.

The BZX84W-Q series belongs to Nexperia's automotive-qualified Zener diode product line, engineered specifically for stable voltage reference and overvoltage protection in harsh-environment electronic control units.

FAQ

What is the maximum continuous forward current for BZX84W-B62-QF?

The device is not rated for continuous forward conduction; its absolute maximum forward current is 200 mA per limiting values table, but it operates exclusively in reverse-biased Zener mode. Forward voltage is specified at 10 mA (≤0.9 V), and sustained forward bias risks thermal runaway due to lack of current-limiting structure.

Can BZX84W-B62-QF be used in parallel for higher power dissipation?

No-Zener diodes exhibit negative temperature coefficients below ~5 V and positive above, but even within the same batch, minor V_Z mismatches cause current hogging. Parallel connection is not recommended; instead, use a single higher-power Zener or active regulation for >275 mW requirements.

How does the no-connect (n.c.) pin affect PCB layout?

Pin 2 is internally unconnected and must remain electrically isolated-no copper trace, solder mask opening, or thermal pad should contact it. Standard SOT323 footprints (e.g., 0.55 mm pad width × 1.325 mm length) accommodate this pin without modification, and wave/reef soldering guidelines explicitly define its non-functional role.

Is the +64.4 mV/K temperature coefficient linear across the full operating range?

No-the coefficient is specified at I_Z = 2 mA and T_j = 25 °C, and varies with current and temperature. Figure 7 shows SZ increases nonlinearly above 10 mA and decreases at elevated temperatures; design margins must account for ±15% coefficient drift from 25 °C to 125 °C per typical characterization data.