Nexperia USA Inc. BZB84-C9V1-QR

Overview

BZB84-C9V1-QR from Nexperia is a dual Zener diode in SOT23 package with common-anode configuration, nominal 9.1 V regulation voltage (±5 % tolerance), 300 mW total power dissipation, and AEC-Q101 qualification for automotive voltage reference and overvoltage protection circuits.

For engineers reviewing the BZB84-C9V1-QR datasheet, BZB84-C9V1-QR pinout, BZB84-C9V1-QR application, or BZB84-C9V1-QR equivalent, this device serves as a compact dual-voltage clamp for rail stabilization, ESD-protected signal conditioning, and redundant voltage monitoring in space-constrained automotive ECUs and industrial control modules.

Technical Context

This dual-common-anode Zener diode integrates two independent 9.1 V Zener elements sharing a single anode terminal (Pin 3), enabling bidirectional clamping or split-rail reference generation without external interconnection. Each diode supports 200 mA forward current and withstands 40 W non-repetitive surge pulses at 100 µs duration.

Its ±5 % voltage tolerance (C-series), 150 °C maximum junction temperature, and 100 K/W junction-to-solder-point thermal resistance ensure stable operation under transient load conditions in engine bay and powertrain environments.

Key Specifications

Pinout & Package

SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch) with gull-wing leads and standardized footprint per Fig. 12 (reflow) and Fig. 13 (wave).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-Zener voltage reference applications.

Compared with MMBZ5240BLT1G and BZX84-C9V1-7-F, BZB84-C9V1-QR uniquely delivers dual 9.1 V regulation in one AEC-Q101-qualified SOT23, eliminating interconnect parasitics and halving PCB footprint-critical for high-density automotive modules.

Availability

BZB84-C9V1-QR is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC analog input modules, body control modules, and medical infusion pump power monitors requiring stable component supply with automotive-grade reliability and traceable sourcing.

Supply support for BZB84-C9V1-QR 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 optimized for automotive, industrial, and mobile applications.

BZB84-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for dual-voltage regulation and transient suppression in harsh-environment automotive electronics.

FAQ

What is the maximum non-repetitive peak reverse current for BZB84-C9V1-QR?

The maximum non-repetitive peak reverse current is 3.0 A at tp = 100 µs, square wave, with junction temperature at 25 °C prior to surge. This value is derived directly from Table 8 of the official Nexperia datasheet Rev. 2 (April 2024) and corresponds to the 9.1 V C-series variant's surge capability.

Does BZB84-C9V1-QR support bidirectional clamping?

Yes - its dual-cathode/common-anode configuration allows simultaneous clamping of two independent nodes to the same 9.1 V reference, or bidirectional clamping of a single node relative to ground (e.g., K1 to ground for positive transients, K2 to ground for negative transients), as confirmed in Pinning Table 2 and Figure 11.

How does the ±5 % tolerance affect regulation accuracy in real-world circuits?

At 9.1 V nominal, ±5 % tolerance means actual Zener voltage falls between 8.5 V and 9.6 V. This is verified in Table 8 (Min/Max columns for BZB84-C9V1-Q), and ensures predictable clamping behavior across production lots while allowing cost-effective selection for non-precision applications like overvoltage protection.

Can BZB84-C9V1-QR replace two discrete Zeners in a design?

Yes - it replaces two SOT23 Zeners (e.g., two BZX84-C9V1) with identical electrical specs while sharing one anode connection, reducing PCB area by ~35 % and eliminating one solder joint and associated thermal path variability, as documented in the General Description and Pinning sections of the datasheet.