Nexperia USA Inc. BZB84-B11,215

Overview

BZB84-B11,215 from Nexperia is a dual common-anode Zener diode in SOT23 package, designed for precision voltage regulation and transient suppression in compact DC power rails. It delivers nominal 11 V Zener voltage (10.8–11.2 V), ±2 % tolerance, 150 Ω typical differential resistance at 5 mA, 0.1 µA reverse current at 8.8 V, and AEC-Q101 qualification for automotive-grade reliability.

For engineers reviewing the BZB84-B11,215 datasheet, BZB84-B11,215 pinout, BZB84-B11,215 application, or BZB84-B11,215 equivalent, this device supports dual-rail clamping, overvoltage protection in infotainment power supplies, and bidirectional voltage reference generation where space-constrained dual-Zener functionality is required.

Technical Context

This dual-Zener diode integrates two independent 11 V Zener elements sharing a common anode (Pin 3), enabling symmetrical clamping of positive and negative transients relative to a reference node. Its design supports bidirectional voltage limiting without external polarity reversal.

The device operates with 300 mW total power dissipation at 25 °C ambient, exhibits 85 pF junction capacitance at 0 V, and sustains non-repetitive peak reverse currents up to 2.5 A under 100 µs square-wave surge conditions - critical for ESD and load-dump immunity in 12 V automotive subsystems.

Key Specifications

Pinout & Package

SOT23 (TO-236AB) plastic surface-mount package: 3-pin, small-outline transistor outline with gull-wing leads; footprint compatible with standard reflow soldering per IPC-7351.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZB84-C11,215, the BZB84-B11,215 offers superior voltage matching for bidirectional reference use; compared with MMBZ5240BS-7-F, it reduces component count, layout complexity, and inter-device parameter spread in dual-clamp topologies.

Availability

BZB84-B11,215 is available at Aetrix Electronics and suitable for automotive infotainment power management, industrial sensor signal conditioning, and telecom line interface protection requiring stable component supply and AEC-Q101 compliance.

Supply support for BZB84-B11,215 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, reliable discrete and logic devices for automotive, industrial, and consumer markets.

The BZB84 series belongs to Nexperia's AEC-Q101-qualified Zener portfolio, engineered specifically for space-constrained voltage regulation and transient suppression in harsh-environment automotive and industrial power systems.

FAQ

What is the maximum continuous power dissipation for BZB84-B11,215 at 70 °C ambient?

At 70 °C ambient, the device's total power dissipation must be derated linearly from 300 mW at 25 °C using its 417 K/W junction-to-ambient thermal resistance. This yields a maximum continuous dissipation of approximately 185 mW - calculated as 300 mW × (1 − (70 − 25)/417). Exceeding this risks junction temperature exceeding 150 °C.

Can BZB84-B11,215 be used for bidirectional ESD protection on a differential signal pair?

Yes - its dual common-anode configuration allows direct connection across differential lines (e.g., RS-485 A/B), with Pin 1 and Pin 2 tied to each line and Pin 3 grounded. This provides symmetrical ±11.2 V clamping with 85 pF capacitance per path, meeting IEC 61000-4-2 Level 4 requirements when combined with appropriate series impedance.

How does the temperature coefficient affect regulation accuracy over −40 °C to +125 °C?

For BZB84-B11,215, the temperature coefficient is specified as +5.4 to +9.0 mV/K. Over a 165 °C range, this introduces a worst-case Zener voltage shift of +0.89 V to +1.49 V - meaning regulation may drift from 10.8 V to as high as 12.69 V. System-level compensation or operating-point selection within the 11 V nominal band mitigates this effect.

Is the marking code 'VT*' on the device body sufficient to confirm BZB84-B11,215 authenticity?

Yes - per Nexperia's official marking table, 'VT*' is the unique top-side marking for BZB84-B11,215, where '*' denotes manufacturing location (e.g., 't' = Malaysia). Authentic units also exhibit consistent SOT23 package dimensions (2.8 mm × 1.4 mm × 1.1 mm) and laser-etched 'VT' with clear contrast on matte black molding compound.