BZB84-B56-QR

Overview

The Nexperia BZB84-B56-QR is a dual voltage regulator diode in the BZB84-Q series, housed in an SOT-23 surface-mount package. It features a dual common anode configuration with two independent Zener diodes sharing pin 3 as the common anode. The nominal working voltage is 56 V with a ±2% tolerance (Series B). Key electrical parameters include a total power dissipation of 300 mW per device and a non-repetitive peak reverse power dissipation of 40 W per diode. The junction temperature range spans from -55 °C to +150 °C, and it is qualified according to AEC-Q101 for automotive applications.

Feature Summary

• Dual common anode configuration integrating two independent Zener diodes in a single compact SOT-23 package.
• Qualified according to AEC-Q101 standards, ensuring suitability for high-performance automotive electronic applications.
• Offers tight voltage tolerance options, including Series B with ±2% accuracy for precise regulation requirements.

Applications

• General voltage regulation functions in dense circuit designs
• Automotive electronics requiring AEC-Q101 qualified components
• Voltage reference circuits utilizing dual independent channels

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current catalog to confirm packaging details such as reel or cut tape quantities. Ensure the design accounts for the dual common anode topology when routing PCB traces, as Pin 3 serves as the shared anode for both cathodes. Confirm thermal management strategies align with the 300 mW total power dissipation limit under expected operating conditions.

Selection Notes

Select this component when a dual-channel voltage regulation solution is required within space-constrained layouts. The BZB84-B56-QR provides a 56 V breakdown voltage with high precision. Designers must account for the shared anode connection, which differs from single-diode packages. Verify that the application current does not exceed the non-repetitive peak limits defined in the datasheet tables for surge protection scenarios.

Part Context

This part belongs to the Nexperia BZB84-Q series, which comprises 74 types of dual voltage regulator diodes ranging from 2.4 V to 75 V. All variants share the same SOT-23 plastic package and AEC-Q101 qualification. The series allows designers to implement complex regulation schemes using minimal board area compared to discrete single-diode solutions.

Replacement Considerations

Direct replacements within the same family include other BZB84-Bxxx-Q variants with different voltage ratings but identical pinouts and package dimensions. Cross-package substitutes like the BZX84 series are single-diode devices and require circuit redesign due to the absence of the dual common anode feature.

FAQ

What is the pin configuration for the BZB84-B56-QR?

Pin 1 is Cathode 1 (K1), Pin 2 is Cathode 2 (K2), and Pin 3 is the Common Anode (CA).

Is the BZB84-B56-QR suitable for automotive use?

Yes, the component is qualified according to the AEC-Q101 standard and is recommended for use in automotive applications.

What is the maximum total power dissipation for the device?

The total power dissipation (Ptot) for the dual device is limited to 300 mW at an ambient temperature of 25 °C.