Nexperia USA Inc. BZB984-C12,115

Overview

BZB984-C12,115 from Nexperia is a dual Zener voltage regulator diode in SOT663 package with nominal 12 V working voltage (±5% tolerance), 265 mW power dissipation per diode at 25 °C, and common-anode configuration for compact dual-rail regulation or ESD clamping. It serves as a precision low-power reference or bidirectional transient suppressor in space-constrained consumer and industrial PCBs.

For engineers reviewing the BZB984-C12,115 datasheet, BZB984-C12,115 pinout, BZB984-C12,115 application, or BZB984-C12,115 equivalent, key selection criteria include its 12.7 V maximum Zener voltage, 0.9 V forward voltage at 10 mA, 85 °C/W thermal resistance to solder point (1 diode loaded), and SOT663 footprint compatibility with high-density layouts.

Technical Context

This dual Zener diode integrates two independent 12 V regulation elements sharing a common anode terminal, enabling symmetrical clamping or dual-voltage referencing from a single ultra-small SMD package. Its design supports simultaneous reverse-bias operation of both diodes under transient conditions while maintaining stable DC regulation.

Thermal performance is defined for FR4 PCB mounting with single-sided copper: total power dissipation reaches 265 mW when only one diode is active, and 425 mW when both are loaded. Junction-to-solder-point thermal resistance is 230 K/W for single-diode operation, critical for reliability in thermally constrained environments.

Key Specifications

Pinout & Package

SOT663 is a 3-lead ultra-small flat plastic surface-mount package measuring 1.7 mm × 1.5 mm × 0.5 mm, optimized for high-density PCB layouts and reflow soldering.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5242B and BZX84-C12, BZB984-C12,115 uniquely delivers dual 12 V regulation paths in one SOT663 package-reducing component count by 50% and PCB area by >30% versus dual-SOT-23 implementations-while maintaining tight ±5% tolerance and FR4-compatible thermal performance.

Availability

BZB984-C12,115 is available at Aetrix Electronics and suitable for USB interface protection, low-power sensor reference, and industrial I/O signal conditioning requiring stable component supply and SMT manufacturability.

Supply support for BZB984-C12,115 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 specializing in high-volume, high-reliability discrete and logic devices, with core competencies in automotive-grade and industrial-standard components.

The BZB984 series belongs to Nexperia's precision Zener diode product line, engineered for compact dual-rail regulation and ESD protection in space- and power-constrained consumer, computing, and industrial electronics.

FAQ

What is the maximum reverse voltage this device can sustain before breakdown?

The BZB984-C12,115 has a nominal Zener voltage of 12 V with a maximum specified value of 12.7 V at 5 mA test current. Its absolute maximum non-repetitive peak reverse voltage is not directly stated, but the non-repetitive peak reverse power dissipation is rated at 40 W for 100 µs pulses-implying transient survivability well above DC breakdown, contingent on pulse energy limits defined in Figure 1 of the datasheet.

Can both Zener diodes operate simultaneously in reverse bias?

Yes-both diodes share a common anode (pin 3) and have independent cathodes (pins 1 and 2), allowing simultaneous reverse-bias operation. The datasheet confirms total power dissipation of 425 mW when both diodes are loaded at 25 °C ambient, validating concurrent regulation or clamping functionality without derating beyond thermal limits.

Is this device suitable for automotive applications?

No-per Nexperia's revision history (Section 13), the BZB984 series was explicitly changed to non-automotive qualification in Rev. 3 (2022). It lacks AEC-Q200 stress testing, extended temperature validation, and automotive-specific reliability reporting, making it unsuitable for safety-critical or engine-compartment environments.

How does the common-anode configuration affect circuit layout?

The common-anode (CA) pin must be connected to the system reference potential (typically ground or V_REF), while each cathode (K1/K2) connects to separate signal or supply nodes requiring regulation or clamping. This topology simplifies grounding in dual-rail systems and avoids floating anodes, but requires careful routing to prevent coupling between K1 and K2 traces in high-frequency ESD scenarios.