DDC143XU-7

Overview

The DDC143XU-7 is an NPN pre-biased small signal dual surface mount transistor manufactured by Diodes Incorporated. It features built-in biasing resistors with nominal values of R1 = 4.7 kΩ and R2 = 10 kΩ. The device is housed in a SOT-363 package, providing two independent NPN transistors within a single compact footprint. Key electrical characteristics include a collector-emitter breakdown voltage (BVCEO) of 50 V, a continuous collector current (IO) of 100 mA, and a peak output current (ICM) of 100 mA. Power dissipation is rated at 200 mW total, with a maximum of 150 mW per element. The transition frequency (fT) is typically 250 MHz, and the DC current gain (GI) has a minimum value of 30.

Feature Summary

• Integrates two NPN transistors with fixed internal biasing resistors to simplify circuit design.
• Utilizes epitaxial planar die construction for reliable performance.
• Compliant with RoHS directives and halogen/antimony-free standards.

Applications

• General-purpose switching applications requiring dual NPN logic control.
• Driver circuits for low-power loads where space-saving dual configurations are beneficial.
• Automotive applications meeting AEC-Q101 qualification requirements when using the Q suffix variant.

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct packaging and status. The standard -7 suffix indicates a 3,000-unit reel size, while other suffixes may denote different quantities or not-recommended-for-new-design statuses. Confirm availability through authorized distributors as supply chain conditions vary. Always cross-reference the latest datasheet revision for any updates to mechanical or electrical specifications before finalizing procurement orders.

Selection Notes

Select this component when a dual NPN configuration with integrated base resistors is required to reduce board space and external component count. Ensure the 50 V collector-emitter voltage rating meets the application's supply requirements. Verify that the 100 mA continuous current limit is sufficient for the load. Consider the SOT-363 package dimensions for PCB layout compatibility. For automotive-grade reliability, select the DDC143XUQ variant which is AEC-Q101 qualified.

Part Context

This part belongs to the DDC(XXXX)U series of NPN pre-biased dual transistors from Diodes Incorporated. It shares the same SOT-363 package and general electrical structure as other members like the DDC143ZU and DDC143TU, differing primarily in the internal resistor values. The series is designed for surface-mount assembly, offering a compact solution for digital switching and amplification tasks in consumer and industrial electronics.

Replacement Considerations

Direct pin-compatible replacements within the same series include DDC143ZU (4.7kΩ/47kΩ) and DDC143TU (4.7kΩ only). For automotive applications, the DDC143XUQ is the qualified equivalent. Verify resistor ratios and current ratings match the original design requirements before substitution.