Nexperia USA Inc. BZB84-B20,215

Overview

BZB84-B20,215 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 20 V nominal Zener voltage (19.6–20.4 V), ±2 % tolerance, 225 Ω typical differential resistance at I_Z = 2 mA, 0.05 µA reverse current at V_R = 15 V, and supports automotive-grade reliability per AEC-Q101.

For engineers reviewing the BZB84-B20,215 datasheet, BZB84-B20,215 pinout, BZB84-B20,215 application, or BZB84-B20,215 equivalent, this dual-Zener device is selected for space-constrained bidirectional clamping, reference voltage generation, and ESD-robust bias network design where tight voltage accuracy and thermal stability are required.

Technical Context

This dual-Zener diode integrates two identical 20 V Zener elements sharing a common anode (Pin 3), enabling symmetrical clamping across supply rails or differential signal lines. Its SOT23 footprint supports high-density PCB layouts while maintaining thermal resistance of 100 K/W (junction-to-solder point) under standard FR4 mounting.

The device operates with a temperature coefficient of +14.4 mV/K at I_Z = 2 mA and exhibits 60 pF capacitance at f = 1 MHz, VR = 0 V - making it suitable for low-frequency regulation rather than RF signal paths. Non-repetitive peak reverse power dissipation is rated at 40 W for 100 µs square-wave pulses at T_j = 25 °C.

Key Specifications

Pinout & Package

SOT23 (TO-236AB) plastic surface-mount package: 3-pin, small outline transistor-style body (2.9 mm × 1.3 mm × 1.0 mm), tin-plated leads, compatible with reflow and wave 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 BZB84-C20,215, the BZB84-B20,215 offers tighter regulation and lower leakage for critical bias networks; versus PDZ20B,115, it eliminates component count and layout complexity for bidirectional use cases - directly reducing BOM cost and PCB real estate.

Availability

BZB84-B20,215 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC input stages, DC-DC converter feedback networks, and USB-C interface protection requiring stable component supply and AEC-Q101 compliance.

Supply support for BZB84-B20,215 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-B20,215 can sustain?

The device has a maximum forward current rating of 200 mA per diode, but for Zener operation, continuous reverse current is limited by power dissipation: at 25 °C ambient, I_Z must stay ≤15 mA to remain within the 300 mW total power limit (P = V_Z × I_Z). Derating is required above 25 °C per the 417 K/W thermal resistance.

Can BZB84-B20,215 be used for bidirectional ESD protection on a data line?

Yes - its dual common-anode structure allows symmetrical clamping of differential signals like RS-485 or CAN bus lines. With 60 pF capacitance and 40 W peak pulse handling, it meets IEC 61000-4-2 Level 4 (15 kV air/8 kV contact) when combined with series impedance, though dedicated TVS arrays may offer lower capacitance for high-speed interfaces.

How does the temperature coefficient affect regulation accuracy over temperature?

At I_Z = 2 mA, the BZB84-B20,215 has a +14.4 mV/K temperature coefficient. Over a −40 °C to +125 °C junction range (165 K delta), this introduces up to ±2.38 V drift (14.4 mV/K × 165 K), meaning actual V_Z shifts from ~18.5 V to ~22.5 V - requiring system-level compensation if sub-1 % accuracy is needed across full temperature range.

Is the SOT23 package lead-free and RoHS compliant?

Yes - the BZB84-B20,215 uses lead-free terminations and complies with EU RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. The device is qualified for reflow soldering per JEDEC J-STD-020, with peak temperature tolerance up to 260 °C for 10 seconds.