Nexperia USA Inc. BZB984-C15,115

Overview

BZB984-C15,115 from Nexperia is a dual Zener voltage regulator diode in SOT663 package with nominal 15 V working voltage (±5% tolerance), 425 mW total power dissipation (2 diodes loaded), and common-anode configuration for compact dual-regulation or ESD protection circuits in space-constrained consumer and industrial PCBs.

For engineers reviewing the BZB984-C15,115 datasheet, BZB984-C15,115 pinout, BZB984-C15,115 application, or BZB984-C15,115 equivalent, key selection criteria include its 15 V ±5% Zener voltage at 5 mA, 0.9 V forward voltage at 10 mA, 10.7 mV/K temperature coefficient, 75 pF capacitance at 0 V, and non-repetitive peak reverse power of 40 W - all critical for precision low-power regulation and transient suppression design.

Technical Context

This dual-Zener device integrates two independent 15 V Zener diodes sharing a common anode terminal, enabling symmetrical clamping or dual-rail regulation from a single ultra-small footprint. Its thermal resistance from junction to ambient is 294 K/W (2 diodes loaded on FR4 PCB), supporting stable operation up to 150 °C junction temperature.

The device exhibits 50 Ω typical differential resistance at I_Z = 5 mA and 0.05 μA maximum reverse current at V_R = 11.4 V, ensuring tight regulation and low leakage in standby modes. Its non-repetitive peak reverse current capability reaches 10.5 A (t_p = 100 μs), making it suitable for moderate-energy ESD pulse handling per IEC 61000-4-2 Level 4.

Key Specifications

Pinout & Package

Package: SOT663 - ultra-small flat plastic SMD package (1.7 mm × 1.5 mm × 0.5 mm height), optimized for high-density PCB layouts and reflow soldering only.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5245BS and MM5Z15V, BZB984-C15,115 delivers true dual-Zener functionality in one SOT663 package, reducing component count by 50%, lowering thermal coupling risk, and enabling tighter matching of V_Z and temperature coefficients between channels.

Availability

BZB984-C15,115 is available at Aetrix Electronics and suitable for USB port protection, low-power sensor biasing, and industrial IO module clamping requiring stable component supply with guaranteed long-term continuity.

Supply support for BZB984-C15,115 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 delivering high-performance logic, discrete, and MOSFET solutions with focus on efficiency, reliability, and miniaturization for consumer, industrial, and automotive markets.

The BZB984 series belongs to Nexperia's precision voltage regulator diode product line, engineered specifically for space-constrained dual-regulation and ESD protection applications demanding tight Zener tolerance and repeatable thermal behavior.

FAQ

What is the maximum continuous reverse current the BZB984-C15,115 can handle at 25 °C?

The device does not specify a continuous reverse current rating; its limiting value is defined by power dissipation. At 25 °C ambient and 2-diode loading, maximum continuous reverse current is calculated as I_Z = P_tot/V_Z ≈ 425 mW / 15 V = 28.3 mA. Operation above this requires derating per thermal resistance curves in the datasheet.

Can BZB984-C15,115 be used in avalanche mode for overvoltage protection?

No - the BZB984-C15,115 is specified and characterized exclusively as a Zener-regulator diode operating in reverse breakdown at its rated V_Z. It is not rated or tested for controlled avalanche operation, and its non-repetitive surge ratings apply only to defined pulse conditions (100 μs square wave), not uncontrolled avalanche conduction.

Is the common anode (CA) pin electrically isolated from the package thermal pad?

Yes - the SOT663 package has no exposed thermal pad; the CA pin is a standard copper leadframe terminal. Thermal resistance values (R_th(j-a), R_th(j-sp)) are measured with the device mounted on standard FR4 PCB with tin-plated copper, confirming CA serves solely as electrical connection, not thermal interface.

How does the 5% V_Z tolerance affect regulation accuracy in a 15 V reference circuit?

At I_Z = 5 mA, V_Z ranges from 13.8 V to 15.6 V, introducing ±0.9 V absolute error. When used as a shunt reference, this translates to ±6% full-scale error. For higher accuracy, post-calibration or trimming of series resistance is required - the device itself provides stable, repeatable regulation within its specified band.