Nexperia USA Inc. BZX84W-C62-QF

Overview

BZX84W-C62-QF from Nexperia is a ±5 % tolerance Zener diode with 62 V nominal regulation voltage, 150 Ω typical differential resistance at 5 mA, and 64.4 mV/K temperature coefficient, housed in an AEC-Q101-qualified SOT323 (SC-70) package for automotive voltage reference and overvoltage protection circuits.

For engineers reviewing the BZX84W-C62-QF datasheet, BZX84W-C62-QF pinout, BZX84W-C62-QF application, or BZX84W-C62-QF equivalent, this part supports precision 62 V clamping in engine control units, ADAS sensor power rails, and infotainment system ESD protection where low capacitance (0.3 pF) and high surge capability (40 W non-repetitive) are required.

Technical Context

This Zener diode operates in reverse breakdown to maintain stable 62 V regulation across 0.5–2 mA test currents, with a positive temperature coefficient of +64.4 mV/K ensuring predictable drift under thermal stress. Its 150 Ω differential resistance at 5 mA enables tight regulation under dynamic load transients.

The device meets AEC-Q101 stress qualification for automotive use, with 150 °C maximum junction temperature, −55 °C to +150 °C ambient operating range, and 455 K/W junction-to-ambient thermal resistance on standard FR4 PCB mounting.

Key Specifications

Pinout & Package

Package: SOT323 (SC-70), 3-terminal leadless surface-mount plastic package with 1.3 mm × 1.8 mm footprint, 0.65 mm pitch, and 0.45 mm height - optimized for high-density automotive PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84W-B62-Q, the BZX84W-C62-QF trades tighter voltage tolerance for lower unit cost and identical automotive qualification; versus MMSZ5259ET1G, it delivers superior high-frequency performance and 30 % smaller PCB area at the expense of 75 mW lower continuous power rating.

Availability

BZX84W-C62-QF is available at Aetrix Electronics and suitable for automotive engine control units, ADAS camera modules, infotainment systems, and electric power steering electronics requiring stable component supply with AEC-Q101 compliance and full traceability.

Supply support for BZX84W-C62-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 solutions with focus on efficiency, reliability, and miniaturization for automotive, industrial, and consumer markets.

The BZX84W-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for automotive voltage regulation, reference, and transient suppression where small size, low capacitance, and thermal robustness are critical.

FAQ

What is the maximum continuous reverse current the BZX84W-C62-QF can sustain without degradation?

The device supports a maximum continuous reverse current of 200 mA, derived from its 275 mW total power dissipation rating and 62 V Zener voltage (I_Zmax = P_tot/V_Z ≈ 4.4 mA at full rating). However, sustained operation above 5 mA requires thermal derating per the 455 K/W junction-to-ambient resistance and ambient temperature constraints.

Does the n.c. pin (pin 2) require any PCB layout treatment?

No. Pin 2 is internally not connected and must remain electrically floating. Do not route traces, apply solder mask openings, or place thermal reliefs to this pad. Standard SOT323 reflow footprint (Fig. 9) specifies 0.55 mm × 0.55 mm solder paste stencil aperture with no copper land-ensuring zero parasitic coupling.

How does the +64.4 mV/K temperature coefficient impact circuit stability in underhood environments?

At +125 °C ambient, the Zener voltage increases by approximately 6.4 V relative to 25 °C (ΔT = 100 K × 64.4 mV/K), shifting regulation from 62 V to ~68.4 V. This predictable positive drift must be accounted for in overvoltage protection thresholds and feedback divider designs to avoid false triggering or loss of clamping margin.

Can BZX84W-C62-QF replace BZX84-C62 in existing designs?

Yes, with verification of layout compatibility: both share 62 V ±5 % rating and SOT323 package, but BZX84W-C62-QF adds AEC-Q101 qualification, 0.3 pF capacitance (vs. ~2 pF for legacy BZX84), and improved surge rating (40 W vs. 30 W). Confirm that the lower capacitance does not destabilize existing RC filters and that wave soldering profiles match the updated thermal profile.