Nexperia USA Inc. BZB84-C13-QR

Overview

BZB84-C13-QR from Nexperia is a dual common-anode Zener diode in SOT23 package, rated for 13 V nominal working voltage (±5 % tolerance), 300 mW total power dissipation, and qualified to AEC-Q101 for automotive use. It provides precision voltage regulation in compact space-constrained designs such as ECU power rail clamping and sensor biasing.

For engineers reviewing the BZB84-C13-QR datasheet, BZB84-C13-QR pinout, BZB84-C13-QR application, or BZB84-C13-QR equivalent, this page delivers verified electrical parameters, automotive-grade thermal performance, dual-diode configuration details, and real-world use cases in vehicle subsystems requiring stable dual-voltage reference or overvoltage protection.

Technical Context

This dual Zener diode integrates two independent 13 V Zener elements sharing a common anode (Pin 3), enabling simultaneous regulation or clamping of two separate signal or supply lines with matched thermal tracking. Its ±5 % voltage tolerance (C-series) and 7.0 mV/K temperature coefficient at I_Z = 5 mA support cost-optimized automotive sensing circuits where tight initial accuracy is balanced against thermal drift.

The device sustains non-repetitive peak reverse power up to 40 W (100 µs square wave, T_j = 25 °C), while continuous operation is limited to 300 mW at T_amb ≤ 25 °C on FR4 PCB. Junction-to-solder-point thermal resistance is 100 K/W, confirming suitability for reflow-soldered automotive modules with moderate power cycling.

Key Specifications

Pinout & Package

SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch), optimized for automated placement and reflow soldering on dense PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZB84-C13-QR, MMBZ5243BS and BZX84-C13-7-F each deliver single-channel Zener regulation but require duplicated components and lose thermal tracking benefits-making them less optimal for space-constrained automotive dual-rail protection where coordinated clamping response matters.

Availability

BZB84-C13-QR is available at Aetrix Electronics and suitable for automotive ECUs, body control modules, and sensor interface circuits requiring stable component supply with AEC-Q101 compliance and long-term production continuity.

Supply support for BZB84-C13-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 focused on essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and consumer markets.

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

FAQ

What is the maximum continuous reverse current the BZB84-C13-QR can sustain at 25 °C ambient?

The device does not specify a maximum continuous reverse current rating; instead, it defines maximum power dissipation (300 mW) and Zener voltage (12.4–14.1 V). At 13 V, this corresponds to ~23 mA average Zener current under steady-state conditions on FR4 PCB at 25 °C ambient, assuming negligible forward conduction and no additional thermal derating.

Can Pin 3 (common anode) be left floating or must it be connected?

Pin 3 (CA) must be connected to a defined reference potential-typically ground or a stable supply rail-to establish the anode reference for both Zener diodes. Leaving it floating prevents proper reverse-bias operation and may cause unpredictable breakdown behavior or thermal runaway due to uncontrolled junction biasing.

How does the ±5 % tolerance affect regulation accuracy in a 12 V automotive system?

With a nominal 13 V rating and ±5 % tolerance, the actual Zener voltage ranges from 12.4 V to 14.1 V. In a 12 V system, this ensures clamping occurs above normal operating voltage but below destructive thresholds (e.g., MOSFET gate oxide limits), providing safe margin against battery overcharge while avoiding nuisance triggering during cold-cranking dips.

Is the BZB84-C13-QR compatible with lead-free reflow profiles per JEDEC J-STD-020?

Yes-the SOT23 package and internal construction are qualified for standard lead-free reflow, supporting peak temperatures up to 260 °C. Nexperia's recommended reflow profile (Figure 12 in datasheet) specifies 60–150 s above 217 °C, with ramp rates and soak times aligned to J-STD-020E for Class 3 reliability in automotive assemblies.