BZB84-C18-QR

Overview

The Nexperia BZB84-C18-QR is a dual voltage regulator diode in the BZB84-Q series, housed in an SOT23 surface-mount package. It features a dual common anode configuration with two independent cathodes. The device provides a nominal Zener voltage of 18 V with a tolerance of approximately ±5%. Total power dissipation is rated at 300 mW per device, while non-repetitive peak reverse power dissipation reaches 40 W per diode. Operating junction temperature ranges from -55 °C to +150 °C. The component is qualified according to AEC-Q101 standards for automotive applications.

Feature Summary

• Dual common anode configuration enabling compact circuit designs
• AEC-Q101 qualification for automotive reliability
• Wide operating temperature range suitable for demanding environments

Applications

• General regulation functions
• Automotive electronic systems requiring voltage reference
• Over-voltage protection circuits

Procurement Notes

Verify the specific suffix and marking code against official Nexperia documentation before procurement. Confirm that the ordering part number matches the required voltage tolerance series (C series for ±5%). Ensure design compatibility with the SOT23 footprint dimensions provided in the datasheet package outline section.

Selection Notes

Select this component when a dual Zener diode with a common anode is required in a small SMD package. The C series offers approximately ±5% voltage tolerance, suitable for general-purpose regulation. Consider the 300 mW total power dissipation limit and thermal resistance values when designing heat management strategies for high-density PCB layouts.

Part Context

This part belongs to the Nexperia BZB84-Q series, which includes 74 types with nominal working voltages ranging from 2.4 V to 75 V. The series utilizes the SOT23 plastic package and is designed for surface-mounted applications. The product line supports both B (±2%) and C (±5%) tolerance selections across various voltage levels.

Replacement Considerations

Direct substitutes within the same series include other BZB84-Q variants with different voltage ratings or tolerance grades (e.g., BZB84-B18-Q). Cross-series replacements require verification of pinout compatibility, power dissipation limits, and package dimensions.