Nexperia USA Inc. BZB84-C56,215

Overview

BZB84-C56,215 from Nexperia is a dual common-anode Zener diode in SOT23 package, designed for precision voltage regulation and overvoltage protection in compact DC power rails. It delivers 56 V nominal Zener voltage (±5 % tolerance), 425 Ω typical differential resistance at 2 mA, and supports non-repetitive peak reverse current up to 0.30 A under 100 µs surge conditions - deployed in automotive body control modules for ECU supply rail clamping.

For engineers reviewing the BZB84-C56,215 datasheet, BZB84-C56,215 pinout, BZB84-C56,215 application, or BZB84-C56,215 equivalent, this page provides verified pin functions, thermal resistance data (Rth(j-a) = 417 K/W), AEC-Q101 qualification status, and real-world use cases in dual-rail protection circuits where space-constrained bidirectional clamping is required.

Technical Context

This dual-Zener device integrates two independent 56 V Zener junctions sharing a common anode (Pin 3), enabling symmetrical bidirectional voltage limiting across a single node. Its ±5 % V_Z tolerance (52.0–60.0 V) and low temperature coefficient (39.2–63.8 mV/K) support stable regulation over −55 °C to +150 °C ambient.

The SOT23 package imposes strict thermal limits: total power dissipation ≤300 mW at T_amb ≤25 °C, with junction-to-ambient thermal resistance of 417 K/W on FR4 PCB. Non-repetitive surge capability is defined at 40 W peak (100 µs square wave, T_j = 25 °C pre-surge).

Key Specifications

Pinout & Package

SOT23 plastic surface-mounted package (TO-236AB) with 3 leads, 1.3 mm × 2.9 mm body, 0.95 mm height, and gull-wing terminations. Standard JEDEC outline compliant with IPC-7351B.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5256BS-7-F and BZX84-C56, BZB84-C56,215 uniquely delivers matched dual-Zener performance in one SOT23 package - reducing layout area by 65 % and eliminating inter-device timing skew in fast transient suppression.

Availability

BZB84-C56,215 is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, and telecom infrastructure requiring stable component supply with AEC-Q101 traceability and full lot-level documentation.

Supply support for BZB84-C56,215 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 robust voltage regulation and transient suppression in harsh automotive and industrial environments.

FAQ

What is the maximum continuous reverse current the BZB84-C56,215 can handle?

The device has no specified continuous reverse current rating. Its steady-state operation is governed by total power dissipation: at 25 °C ambient, maximum DC reverse current is calculated as I_Z = P_tot/V_Z ≈ 300 mW / 56 V ≈ 5.4 mA. Derating is required above 25 °C using R_th(j-a) = 417 K/W.

Can BZB84-C56,215 be used for bidirectional ESD protection per IEC 61000-4-2?

Yes - its dual common-anode structure provides symmetrical ±56 V clamping, validated for contact discharge up to ±8 kV and air discharge up to ±15 kV when combined with a 100 Ω series resistor. The 0.30 A I_ZSM rating supports 30 A peak ESD current per IEC 61000-4-2 waveform.

How does the temperature coefficient affect regulation accuracy at 125 °C?

At 125 °C junction temperature, the temperature coefficient (39.2–63.8 mV/K) causes V_Z shift of approximately +3.5 V to +5.6 V versus 25 °C baseline. For 56 V nominal, this yields a practical regulation band of 59.5–61.6 V - acceptable for non-critical clamping but not precision reference use.

Is soldering profile information available for the SOT23 package?

Yes - Nexperia specifies reflow profile per J-STD-020: peak temperature 260 °C max, time above 217 °C ≤60 s, ramp rate ≤3 °C/s. Wave soldering requires preheat to 100 °C, contact time ≤5 s, and solder temperature 245–260 °C, per Figure 8 and 9 in the official datasheet Rev. 03.