Nexperia USA Inc. BZB84-B4V7,215

Overview

BZB84-B4V7,215 from Nexperia is a dual common-anode Zener diode in SOT23 package, rated for 4.61 V to 4.79 V nominal Zener voltage at 5 mA, with ±2 % tolerance, 500 Ω differential resistance, and 300 mW total power dissipation. It serves as a precision voltage reference and overvoltage clamp in automotive power supply rails and sensor interface circuits.

For engineers reviewing the BZB84-B4V7,215 datasheet, BZB84-B4V7,215 pinout, BZB84-B4V7,215 application, or BZB84-B4V7,215 equivalent, this device supports dual-channel bidirectional clamping, AEC-Q101-qualified operation up to 150 °C junction temperature, and surface-mount compatibility with standard reflow profiles on FR4 PCBs.

Technical Context

This dual Zener diode integrates two identical Zener elements sharing a common anode (Pin 3), enabling symmetrical clamping of differential signals or independent regulation of two low-current nodes. Each diode exhibits a typical temperature coefficient of −3.5 mV/K to +0.2 mV/K and reverse capacitance of 300 pF at 0 V.

It operates within a wide ambient range (−55 °C to +150 °C), supports non-repetitive surge currents up to 6.0 A (100 µs square wave), and maintains stable regulation under transient load conditions due to its low dynamic impedance and fast response to voltage excursions.

Key Specifications

Pinout & Package

SOT23 (TO-236AB) plastic surface-mounted package with 3 leads, 1.9 mm × 1.1 mm footprint, and 0.95 mm height; optimized for automated placement and reflow soldering on standard FR4 PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZB84-B4V7,215, MMBZ5225BS-7-F and BZX84-B4V7 require additional components to replicate dual-channel functionality, increase PCB area by ≥40 %, and lack the inherent symmetry and thermal coupling of the monolithic dual-Zener structure-making them less suitable for precision analog protection and automotive-grade redundancy.

Availability

BZB84-B4V7,215 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial analog input protection, USB-C port clamping, and low-power MCU reset circuits requiring stable component supply with AEC-Q101 compliance.

Supply support for BZB84-B4V7,215 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 high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and energy-efficient solutions.

The BZB84 series targets compact, robust voltage regulation and transient suppression in space-constrained automotive and industrial systems, emphasizing AEC-Q101 validation, thermal resilience, and SMT manufacturability.

FAQ

What is the maximum continuous reverse current this device can handle?

The BZB84-B4V7,215 supports a maximum continuous forward current of 200 mA per diode, but Zener operation is specified at test currents up to 5 mA. Continuous reverse conduction beyond 5 mA requires thermal derating based on ambient temperature and PCB copper area; at 25 °C ambient, sustained 5 mA per diode stays within the 300 mW total power limit.

Can this dual Zener be used for bidirectional ESD protection on a differential pair?

Yes - connect the common anode (Pin 3) to ground or reference potential, and route each cathode (Pins 1 and 2) to one side of the differential pair. This configuration clamps positive and negative transients symmetrically to ±4.7 V, with measured 300 pF capacitance minimizing signal skew and preserving common-mode rejection above 100 kHz.

How does the temperature coefficient affect regulation accuracy over automotive temperature ranges?

At 4.7 V nominal, the BZB84-B4V7,215 exhibits a temperature coefficient between −3.5 mV/K and +0.2 mV/K. Over −40 °C to +125 °C, this introduces ≤±0.7 V drift - acceptable for non-precision clamping. For tighter regulation, use with a low-tempco bias network or select higher-voltage variants (>6.2 V) where coefficient improves to +0.4 mV/K and above.

Is the SOT23 package compatible with standard IPC-7095 reflow profiles?

Yes - the SOT23 outline meets JEDEC J-STD-020D moisture sensitivity level 1 and is qualified for peak reflow temperatures up to 260 °C. Recommended profile uses 60–90 s above 217 °C, with ramp rates ≤3 °C/s pre- and post-peak, matching standard lead-free assembly processes for FR4 boards with tin-plated copper.