DDTC144TKA-7-F

Overview

The DDTC144TKA-7-F is an NPN pre-biased small signal surface mount transistor manufactured by Diodes Incorporated. It features epitaxial planar die construction and a built-in biasing resistor (R1) with a nominal value of 47 kOhms. The device operates within a collector-emitter voltage range of up to 50 V and supports a maximum continuous collector current of 100 mA, with a power dissipation rating of 200 mW. Packaged in the SC-59 (SOT-23-3) case, it offers a DC current transfer ratio (hFE) ranging from 100 to 600 at IC = 1mA, VCE = 5V, and a gain-bandwidth product of 250 MHz.

Feature Summary

• Integrates a single built-in biasing resistor (R1 only) to simplify circuit design and reduce component count.
• Utilizes epitaxial planar die construction for reliable performance in surface mount applications.
• Comes in a compact SC-59 molded plastic package designed for automated assembly processes.

Applications

• Switching applications requiring simplified base drive circuits.
• Driver stages for logic outputs interfacing with higher current loads.
• General-purpose amplification in low-power electronic systems.

Procurement Notes

Verify the specific revision of the datasheet DS30339 Rev. 6 - 2 when sourcing components, as manufacturing details may evolve. Confirm that the received units match the SC-59 package marking codes and date code requirements specified in the ordering information section. Ensure compliance with RoHS standards if required by the final assembly specifications.

Selection Notes

Select this component when an NPN configuration with a 47 kOhm base resistor is required. Compare the 200 mW power dissipation limit against the thermal environment of the target application. Consider the complementary PNP type (DDTA144TKA-7-F) if push-pull configurations are needed. Verify that the 50 V breakdown voltage meets the system's maximum operating voltage constraints.

Part Context

This part belongs to the DDTC (R1-only series) KA family from Diodes Incorporated. It shares the same physical footprint and electrical characteristics as other variants in the series, differing primarily in the nominal value of the integrated base resistor. The 'KA' suffix denotes the specific package and lead-free plating configuration used in this generation of products.

Replacement Considerations

Direct substitutes include other NPN pre-biased transistors with similar R1 values and SC-59 packaging. Verify pinout compatibility and ensure that the replacement device meets or exceeds the 50 V VCEO and 100 mA IC ratings. Check for equivalent hFE ranges and thermal resistance characteristics to maintain circuit performance.