Nexperia USA Inc. BZB84-C2V4-QR

Overview

BZB84-C2V4-QR from Nexperia is a dual Zener diode in SOT23 package with nominal 2.4 V regulation voltage, ±5 % tolerance, and common-anode configuration for compact dual-voltage reference or clamping in automotive power rails. It delivers 300 mW total power dissipation, supports 200 mA forward current, and is AEC-Q101 qualified for under-hood electronics.

For engineers reviewing the BZB84-C2V4-QR datasheet, BZB84-C2V4-QR pinout, BZB84-C2V4-QR application, or BZB84-C2V4-QR equivalent, key selection criteria include its dual-common-anode topology, 2.4 V Zener voltage with ±5 % tolerance, non-repetitive 40 W surge capability, and thermal resistance of 100 K/W to solder point - critical for space-constrained automotive voltage stabilization designs.

Technical Context

This dual Zener diode integrates two independent 2.4 V Zener elements sharing a common anode (Pin 3), enabling bidirectional clamping or dual-rail referencing from a single footprint. Its differential resistance is ≤600 Ω at 5 mA, and temperature coefficient is −3.5 to 0.0 mV/K across operating current.

Designed for automotive environments, it operates from −55 °C to +150 °C ambient, with junction temperature limited to 150 °C and qualified per AEC-Q101. The device sustains non-repetitive reverse surges up to 40 W (100 µs square wave) while maintaining stable regulation under transient load conditions.

Key Specifications

Pinout & Package

SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pitch); 3-terminal configuration optimized for automated placement and reflow soldering.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZB84-B2V4-Q, the C-tolerance version trades voltage accuracy for broader process yield and lower cost, while MMBZ5222BS-7-F lacks integrated dual functionality - making BZB84-C2V4-QR optimal for space- and BOM-constrained dual-rail automotive systems requiring AEC-Q101 compliance.

Availability

BZB84-C2V4-QR is available at Aetrix Electronics and suitable for automotive body control modules, infotainment power sequencing, and ADAS camera bias supplies requiring stable component supply with AEC-Q101 assurance.

Supply support for BZB84-C2V4-QR 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, reliable discrete, logic, and MOSFET devices with focus on automotive, industrial, and mobile markets.

The BZB84-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for robust voltage regulation and transient protection in harsh automotive environments.

FAQ

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

The BZB84-C2V4-QR supports a maximum continuous forward current of 200 mA per diode, but its Zener operation relies on controlled reverse current. At 5 mA test current, it maintains regulation; sustained reverse current must stay within 300 mW total power limit - translating to ~125 mA at 2.4 V, assuming ideal thermal conditions and derating above 25 °C ambient.

Can this dual Zener be used for bidirectional ESD protection?

Yes - with cathodes (Pins 1 and 2) connected to protected signal lines and the common anode (Pin 3) tied to ground, the device provides symmetrical ±2.4 V clamping. Its 40 W non-repetitive surge rating and AEC-Q101 qualification make it suitable for ISO 10605-compliant ESD protection in automotive sensor interfaces.

How does the ±5 % tolerance affect regulation accuracy in real-world operation?

The ±5 % tolerance means the actual Zener voltage falls between 2.20 V and 2.60 V at 5 mA. In practice, regulation error increases with current variation and temperature drift; however, the matched dual structure ensures both diodes track similarly, preserving relative accuracy in differential applications like rail-to-rail clamping or reference splitting.

Is thermal derating required when mounting on 2-layer versus 4-layer PCBs?

Yes - the 300 mW rating assumes FR4 with single-sided 1 oz copper and standard SOT23 footprint. On 2-layer boards with limited copper area, thermal resistance rises significantly; derating to ≤180 mW is recommended. With internal ground/power planes and thermal vias, full 300 mW may be sustained, verified via junction temperature measurement under worst-case ambient conditions.