Nexperia USA Inc. BZB784-C8V2-QX

Overview

BZB784-C8V2-QX from Nexperia is a dual Zener voltage regulator diode in SOT323 (SC-70) package, configured with common anode and two independent cathodes (K1/K2), delivering 8.2 V nominal regulation at 5 mA with ±5% tolerance, 700 nA reverse leakage at VR = 5 V, and 350 mW total power dissipation - used for precision voltage reference and bidirectional ESD clamping in automotive sensor interfaces.

For engineers reviewing the BZB784-C8V2-QX datasheet, BZB784-C8V2-QX pinout, BZB784-C8V2-QX application, or BZB784-C8V2-QX equivalent, this page provides verified electrical characteristics, thermal resistance values (Rth(j-a) = 355 K/W for dual-diode operation), AEC-Q101 qualification status, and exact SC-70 footprint dimensions to support layout validation and automotive-grade reliability assessment.

Technical Context

This dual-Zener device integrates two independently rated Zener diodes sharing a common anode terminal, enabling symmetrical bidirectional voltage clamping or dual-rail regulation without external interconnection. Its differential resistance of 40 Ω at IZ = 5 mA and temperature coefficient of +4.3 mV/K ensure stable regulation across automotive ambient ranges (−40 °C to +150 °C).

The device operates under AEC-Q101 stress qualification, with non-repetitive peak reverse power dissipation rated at 40 W (tp = 100 µs), junction temperature limit of 150 °C, and thermal resistance from junction to solder point of 140 K/W when both diodes are loaded - confirming suitability for transient surge suppression in CAN/LIN bus nodes and ABS sensor signal conditioning.

Key Specifications

Pinout & Package

Package: SOT323 (SC-70), plastic surface-mounted, 3-lead, 1.3 mm pitch, 2.0 mm × 1.25 mm × 0.95 mm body; optimized for reflow soldering per IPC-7095 guidelines.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-Zener regulation and clamping applications.

Compared with BZX84-C8V2,215, the BZB784-C8V2-QX reduces component count by 50% and eliminates interconnect inductance in high-speed clamping paths; versus DMN3026LSD-13, it delivers true bidirectional regulation without gate drive overhead or conduction losses.

Availability

BZB784-C8V2-QX is available at Aetrix Electronics and suitable for automotive sensor interfaces, CAN bus protection, infotainment audio biasing, and ADAS camera power sequencing requiring stable component supply with AEC-Q101 compliance and traceable sourcing.

Supply support for BZB784-C8V2-QX 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 essential efficiency technologies, delivering high-performance logic, discrete, and MOSFET solutions for automotive, industrial, and mobile markets.

The BZB784-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for robust voltage regulation and bidirectional ESD/surge protection in harsh automotive environments.

FAQ

What is the maximum continuous forward current for BZB784-C8V2-QX?

The device is not rated for continuous forward conduction as a rectifier; its absolute maximum forward current is 200 mA per diode, but typical operation uses reverse-bias Zener regulation. Forward voltage is specified at 0.9 V @ IF = 10 mA - intended for ESD clamping conduction, not sustained forward power delivery.

Can BZB784-C8V2-QX replace two separate Zener diodes in a common-cathode configuration?

No - its internal structure is common-anode (CA), with cathodes K1 and K2 electrically isolated. To replicate a common-cathode dual-Zener, external inversion (e.g., using PNP followers) would be required; the device is optimized for common-anode clamping to VCC, not ground-referenced regulation.

Is the 8.2 V Zener voltage specified at DC or pulsed conditions?

The nominal 8.2 V rating is specified at DC test condition IZ = 5 mA, Tj = 25 °C. Under transient surge (tp = 100 µs), the clamping voltage rises due to dynamic impedance and thermal effects - actual peak clamping may reach 9.5 V at 40 W pulse, as validated in AEC-Q101 surge testing.

Does the SOT323 package support automated optical inspection (AOI) after reflow?

Yes - the SC-70 outline has defined solder land geometry (2.65 mm × 2.35 mm occupied area, 0.55 mm pad width) and coplanarity tolerance (<0.1 mm), meeting IPC-A-610 Class 3 requirements for AOI-compatible fiducial alignment and solder joint quality verification in automotive manufacturing lines.