Nexperia USA Inc. BZB84-B5V1,215

Overview

BZB84-B5V1,215 from Nexperia is a dual common-anode Zener diode in SOT23 package, rated for 5.00 V to 5.20 V nominal Zener voltage at 5 mA, with ±2 % tolerance, 480 Ω typical differential resistance, and 2 µA maximum reverse current at 2 V. It delivers 40 W non-repetitive peak reverse power dissipation (100 µs square wave) and supports automotive-grade regulation in compact PCB space-constrained designs.

For engineers reviewing the BZB84-B5V1,215 datasheet, BZB84-B5V1,215 pinout, BZB84-B5V1,215 application, or BZB84-B5V1,215 equivalent, this device is selected for precision dual-rail voltage clamping, ESD-protected I/O line regulation, and AEC-Q101-compliant automotive subsystems requiring stable low-voltage reference and transient suppression.

Technical Context

This dual-Zener diode integrates two independent Zener junctions sharing a common anode (Pin 3), enabling bidirectional voltage clamping across two cathodes (Pins 1 and 2). Its design supports symmetrical overvoltage protection on differential signal lines or independent regulation of two low-power rails from a shared ground return.

It operates within −55 °C to +150 °C ambient range, features 300 mW total power dissipation at Tamb ≤ 25 °C, and maintains thermal resistance of 417 K/W (junction-to-ambient) on FR4 PCB - critical for sustained operation in thermally dense automotive ECUs and industrial sensor nodes.

Key Specifications

Pinout & Package

SOT23 (TO-236AB) plastic surface-mount package: 3-terminal, small-outline, lead-free, RoHS-compliant, footprint compatible with standard reflow and wave soldering processes per Nexperia's sot023_fr/sot023_fw guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5221BS-7-F and BZX84-C5V1,215, the BZB84-B5V1,215 uniquely delivers matched dual-clamp capability in one footprint - reducing component count by 50 %, improving layout symmetry, and enabling true differential transient suppression without inter-device parameter mismatch.

Availability

BZB84-B5V1,215 is available at Aetrix Electronics and suitable for automotive infotainment head units, industrial 4–20 mA transmitters, USB peripheral protection circuits, and battery-powered IoT sensor nodes requiring stable component supply with AEC-Q101 assurance.

Supply support for BZB84-B5V1,215 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 high-volume, high-reliability essential semiconductors - delivering discrete, logic, and MOSFET solutions optimized for automotive, industrial, and mobile markets.

The BZB84 series belongs to Nexperia's AEC-Q101-qualified Zener portfolio, engineered specifically for robust voltage regulation and transient suppression in harsh-environment automotive subsystems and precision analog interfaces.

FAQ

What is the maximum continuous forward current rating for BZB84-B5V1,215?

The absolute maximum forward current is 200 mA per diode, as specified in Table 5 of the Nexperia datasheet. This rating applies under steady-state conditions with ambient temperature ≤25 °C and assumes proper PCB thermal relief. Exceeding this value risks permanent junction damage due to localized overheating.

Can BZB84-B5V1,215 be used for bidirectional signal line protection?

Yes - its dual common-anode configuration allows it to clamp both positive and negative transients on two independent signal lines referenced to the same ground. When used with appropriate series impedance, it meets IEC 61000-4-2 and ISO 10605 ESD requirements for bidirectional data lines such as RS-485 or CAN.

How does the ±2 % tolerance affect matching between the two Zener diodes?

Both diodes in the BZB84-B5V1,215 share the same ±2 % tolerance band around 5.1 V nominal, ensuring voltage matching within 0.2 V at 5 mA test current. This enables balanced clamping thresholds in differential applications, minimizing common-mode offset during transient events.

Is thermal derating required when operating above 25 °C ambient?

Yes - total power dissipation must be linearly derated above 25 °C at 2.4 mW/°C, based on the 417 K/W junction-to-ambient thermal resistance. At 85 °C ambient, maximum allowable P_tot drops to 156 mW to maintain T_j ≤ 150 °C, as defined in Table 5 and Table 6 of the datasheet.