BZB784-C3V9-QX

Overview

The Nexperia BZB784-C3V9-QX is a low-power voltage regulator double diode housed in a SOT323 (SC-70) surface-mount package. It features a nominal working voltage of 3.9 V with approximately 5% tolerance and a total power dissipation of 350 mW. The device includes two common-anode Zener diodes, each rated for a maximum forward current of 200 mA and a non-repetitive peak reverse current of 6.0 A at 100 µs. Electrical characteristics include a maximum differential resistance of 90 Ω and a typical temperature coefficient of -1.9 mV/K at IZ = 5 mA. The component operates within an ambient temperature range of -55 °C to +150 °C and is qualified according to the AEC-Q101 standard.

Feature Summary

• Dual common-anode configuration providing two independent voltage regulation channels in a compact footprint.
• AEC-Q101 qualification ensuring suitability for demanding automotive electronic applications.
• Low thermal resistance design enabling effective heat dissipation in high-density circuit layouts.

Applications

• General voltage regulation functions
• Electrostatic discharge (ESD) protection
• Surge protection circuits

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm the packaging format. Confirm that the requested part number matches the exact voltage rating and package type required for the design. Ensure compliance with the automotive qualification standards specified in the product data sheet before finalizing procurement orders.

Selection Notes

Select this component when dual voltage reference or protection channels are needed in space-constrained designs. The SC-70 package offers a small body size suitable for high-density PCB layouts. Consider the negative temperature coefficient for lower voltage variants when designing precision reference circuits across wide operating temperature ranges.

Part Context

This device belongs to the BZB784-Q series, which provides a comprehensive range of nominal working voltages from 2.4 V to 15 V. All members of this series share the same SOT323 package and AEC-Q101 automotive qualification, allowing for consistent supply chain management across different voltage requirements in automotive electronics.

Replacement Considerations

Compatible substitutes within the same series include BZB784-C3V9-Q and BZB784-C3V9-QX. Verify that any replacement maintains the identical SOT323 pinout and electrical tolerances to ensure direct interchangeability without circuit modification.

FAQ

What is the marking code for the BZB784-C3V9-Q?

The marking code for the BZB784-C3V9-Q is 96.

What is the maximum non-repetitive peak reverse current for this device?

The maximum non-repetitive peak reverse current (IZSM) is 6.0 A under conditions of tp = 100 µs square wave at Tamb = 25 °C.

How is the internal structure configured?

The device contains two diodes with a common anode (CA). Pin 3 serves as the common anode, while Pins 1 and 2 serve as the cathodes for Diode 1 and Diode 2, respectively.