Nexperia USA Inc. BZB84-B15,215

Overview

BZB84-B15,215 from Nexperia is a dual common-anode Zener diode in SOT23 package, designed for precision voltage regulation and transient suppression in compact power rails. It delivers 14.7 V to 15.3 V nominal Zener voltage at 5 mA, ±2 % tolerance, 200 Ω typical differential resistance, and 300 mW total power dissipation - used in automotive body control modules for ECU reference voltage stabilization.

For engineers reviewing the BZB84-B15,215 datasheet, BZB84-B15,215 pinout, BZB84-B15,215 application, or BZB84-B15,215 equivalent, key selection criteria include dual-Zener common-anode topology, AEC-Q101 qualification, 15 V nominal clamping, thermal resistance of 417 K/W (junction-to-ambient), and non-repetitive peak reverse current of 2.0 A under 100 µs surge.

Technical Context

This dual-Zener device integrates two identical 15 V Zener elements sharing a common anode (Pin 3), enabling bidirectional voltage clamping or dual-rail reference generation without external node connection. Its design supports symmetric reverse-bias operation with matched temperature coefficients (9.2 to 13.0 mV/K) and low capacitance (75 pF at 1 MHz).

It operates within −55 °C to +150 °C ambient range, with junction temperature limited to 150 °C, and is rated for non-repetitive 40 W peak reverse power dissipation (100 µs square wave). The SOT23 footprint ensures compatibility with high-density automotive PCB layouts while maintaining thermal performance via standard FR4 mounting.

Key Specifications

Pinout & Package

SOT23 (TO-236AB) plastic surface-mounted package: 3-pin, small-outline transistor outline with gull-wing leads; 1.3 mm × 2.9 mm footprint, 1.1 mm height; optimized for reflow soldering per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5245B-7-F and BZX84-B15, BZB84-B15,215 uniquely delivers matched dual-Zener performance in one footprint - reducing component count, improving thermal coupling between elements, and enabling true bidirectional transient suppression without layout compromises.

Availability

BZB84-B15,215 is available at Aetrix Electronics and suitable for automotive electronics, industrial PLC I/O modules, and medical sensor signal conditioning requiring stable component supply, AEC-Q101 compliance, and dual-Zener functional integration.

Supply support for BZB84-B15,215 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 logic, analog, and discrete components for automotive, industrial, and consumer markets.

The BZB84 series belongs to Nexperia's AEC-Q101-qualified Zener portfolio, engineered specifically for robust voltage reference and transient protection in space-constrained automotive and industrial control systems.

FAQ

What is the maximum continuous reverse current for BZB84-B15,215 at 25 °C?

The maximum continuous reverse current is derived from its 300 mW total power dissipation and 15 V nominal Zener voltage, yielding approximately 20 mA (300 mW ÷ 15 V). This assumes uniform power sharing between both diodes and ambient temperature ≤25 °C with no derating.

Can BZB84-B15,215 be used for bidirectional ESD protection on a data line?

Yes - its dual common-anode configuration allows it to clamp both positive and negative transients to ground simultaneously. With 75 pF capacitance and 2.0 A non-repetitive peak current rating, it meets IEC 61000-4-2 Level 4 (±15 kV air) when paired with appropriate series impedance.

How does the ±2 % tolerance affect stability in a feedback loop?

The ±2 % tolerance directly impacts setpoint accuracy in closed-loop regulators. For a 15 V reference, this equates to ±0.3 V deviation, which translates to ±2 % output error in a simple resistor-divider feedback network - acceptable for most automotive 12 V system monitoring without trimming.

Is thermal derating required above 25 °C ambient?

Yes - the 300 mW power rating applies only at T_amb ≤25 °C. Above that, power must be linearly derated at 2.4 mW/°C (based on R_th(j-a) = 417 K/W), reaching zero dissipation at 148 °C ambient - consistent with its 150 °C maximum junction temperature rating.