Nexperia USA Inc. BZB984-C9V1,115

Overview

BZB984-C9V1,115 from Nexperia is a dual Zener voltage regulator diode in SOT663 package with nominal 9.1 V working voltage (±5% tolerance), 40 Ω typical differential resistance at I_Z = 5 mA, and 0.5 μA maximum reverse current at V_R = 7.2 V. It serves as a compact, low-power precision reference or clamping element in space-constrained power rails and ESD protection circuits.

For engineers reviewing the BZB984-C9V1,115 datasheet, BZB984-C9V1,115 pinout, BZB984-C9V1,115 application, or BZB984-C9V1,115 equivalent, this device is selected for dual-cathode common-anode regulation where thermal coupling, footprint efficiency, and ±5% V_Z stability across 25–150 °C are critical design requirements.

Technical Context

This double Zener diode integrates two independent 9.1 V Zener junctions sharing a common anode terminal, enabling symmetrical bidirectional clamping or dual-rail referencing from a single ultra-small SMD footprint. Its thermal resistance from junction to solder point is 125 K/W (2 diodes loaded), supporting stable operation under pulsed surge conditions up to 40 W (t_p = 100 µs).

The device exhibits a +5.2 mV/K temperature coefficient at I_Z = 5 mA and maintains ≤ 0.9 V forward voltage at I_F = 10 mA, allowing use in both reverse-bias regulation and forward-bias bypass roles. Its 150 °C maximum junction temperature and -55 °C to +150 °C ambient rating support industrial and automotive-adjacent environments when derated per thermal data.

Key Specifications

Pinout & Package

Package: SOT663 - ultra-small flat plastic SMD package (1.7 × 1.5 × 0.5 mm), 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 MMBZ5240BS and SMBZ5240B, BZB984-C9V1,115 delivers true dual-junction regulation in one SOT663 package-reducing component count by 50%, improving thermal tracking between channels, and enabling symmetrical bidirectional clamping impossible with discrete singles.

Availability

BZB984-C9V1,115 is available at Aetrix Electronics and suitable for industrial sensor conditioning, USB ESD protection, low-power IoT voltage reference, and automotive body control module clamp applications requiring stable component supply and long-term obsolescence management.

Supply support for BZB984-C9V1,115 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 focused on essential efficiency-enhancing components, with leadership in logic, discrete, and MOSFET technologies serving automotive, industrial, and consumer markets.

The BZB984 series belongs to Nexperia's precision Zener regulator portfolio, engineered specifically for space-constrained dual-rail referencing and bidirectional transient suppression in high-reliability industrial and computing applications.

FAQ

What is the maximum continuous power dissipation for BZB984-C9V1,115 when both diodes are active?

The maximum total power dissipation is 425 mW at T_amb ≤ 25 °C with the device mounted on a standard FR4 PCB (single-sided copper, tin-plated). This rating assumes both diodes are conducting simultaneously and requires adherence to the specified thermal footprint and soldering profile per Figure 10 of the datasheet.

Can BZB984-C9V1,115 be used for bidirectional TVS protection?

Yes-it functions as a bidirectional clamp when the common anode (pin 3) is grounded and cathodes (pins 1 and 2) connect to protected lines. Its 9.1 V Zener voltage, 40 W non-repetitive surge rating (t_p = 100 µs), and 150 pF capacitance make it suitable for IEC 61000-4-2 ESD and low-energy surge suppression on differential or single-ended signals.

How does the temperature coefficient affect regulation accuracy over temperature?

At I_Z = 5 mA, the BZB984-C9V1,115 has a +5.2 mV/K temperature coefficient. Over a 100 °C range (25–125 °C), this produces ~520 mV drift-approximately ±2.8% of nominal 9.1 V. For tighter accuracy, operate near 25 °C or use external compensation; the ±5% initial tolerance dominates error at room temperature.

Is the SOT663 package compatible with standard reflow soldering processes?

Yes-Nexperia specifies reflow soldering as the only recommended method. The package outline (Figure 9) and solder land pattern (Figure 10) define precise stencil aperture and pad dimensions: 0.55 mm × 0.55 mm pads with 0.5 mm pitch and 1.9 mm × 0.6 mm overall footprint. Peak reflow temperature must not exceed 260 °C per JEDEC J-STD-020.