Nexperia USA Inc. BZB984-C7V5,115

Overview

BZB984-C7V5 from Nexperia is a dual Zener voltage regulator diode in SOT663 package, configured as two cathodes sharing a common anode (CA-K1-K2), with nominal Zener voltage 7.5 V ±5%, 30 Ω typical differential resistance at I_Z = 5 mA, and 6 μA max reverse current at V_R = 7.0 V - used for precision low-power voltage reference and bidirectional ESD clamping in space-constrained sensor interfaces.

For engineers reviewing the BZB984-C7V5 datasheet, BZB984-C7V5 pinout, BZB984-C7V5 application, or BZB984-C7V5 equivalent, this page delivers verified package mapping (SOT663), terminal roles (CA/K1/K2), thermal resistance (125 K/W junction-to-solder-point, 2 diodes loaded), and real-world regulation/ESD use cases - all extracted from Nexperia's Rev. 3 product data sheet.

Technical Context

This dual-Zener device implements a common-anode configuration enabling independent regulation or clamping paths from either cathode to the shared anode. Its 7.5 V nominal Zener voltage exhibits +3.6 mV/K temperature coefficient at I_Z = 5 mA, supporting stable reference generation across -55 °C to +150 °C ambient range.

Thermal design is constrained by FR4 PCB mounting: total power dissipation is limited to 425 mW when both diodes are active, with junction-to-ambient thermal resistance of 294 K/W (free air, 2 diodes) and 125 K/W to solder point - critical for sustained surge handling in transient protection circuits.

Key Specifications

Pinout & Package

SOT663 is an ultra-small flat plastic surface-mount package (1.7 × 1.5 × 0.5 mm) with three leads, optimized for high-density PCB layouts and automated reflow assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5236BS-7-F and PZU7.5B2A, BZB984-C7V5 uniquely combines SOT663 miniaturization, 425 mW dual-diode power handling, and verified 40 W surge capability - making it optimal for space- and reliability-critical dual-line protection.

Availability

BZB984-C7V5 is available at Aetrix Electronics and suitable for industrial sensor conditioning, USB ESD protection, and low-power IoT voltage reference applications requiring stable component supply and long-term obsolescence management.

Supply support for BZB984-C7V5 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 headquartered in Nijmegen, Netherlands, specializing in high-volume, high-reliability discrete and logic devices for automotive, industrial, and consumer markets.

The BZB984 series belongs to Nexperia's precision Zener diode portfolio, engineered specifically for miniaturized dual-channel regulation and bidirectional transient suppression in space-constrained, thermally demanding applications.

FAQ

What is the maximum continuous current each Zener junction can handle?

Each junction supports up to 200 mA forward current (I_F) and operates continuously at ≤5 mA Zener current for regulation. At 7.5 V, this yields ≤37.5 mW per junction under steady-state conditions - well within the 265 mW single-diode power limit specified for FR4 mounting.

Can BZB984-C7V5 be used for bidirectional clamping between two signal lines?

No - its common-anode topology only permits clamping from either cathode to the shared anode rail (e.g., V_CC or GND). For true differential clamping between two signals, a dual-common-cathode or back-to-back configuration is required; this device is intended for single-rail referenced dual-channel protection.

How does the 3.6 mV/K temperature coefficient affect accuracy over temperature?

At I_Z = 5 mA, the +3.6 mV/K coefficient causes a +36 mV shift from 25 °C to 125 °C ambient. Combined with ±5% initial tolerance, total V_Z variation is ±0.375 V + 0.1 V = ±0.475 V - acceptable for non-critical references but not for high-precision metrology.

Is SOT663 reflow-compatible with standard lead-free processes?

Yes - Nexperia specifies reflow soldering as the only recommended method. The package withstands JEDEC J-STD-020-compliant peak temperatures up to 260 °C, with thermal resistance data (R_th(j-sp) = 125 K/W) validated on standard FR4 boards using tin-plated copper and the footprint shown in Figure 10 of the datasheet.