DDTC123TUA-7

Overview

The DDTC123TUA-7 is an NPN pre-biased small signal surface mount transistor manufactured by Diodes Incorporated. It features epitaxial planar die construction and integrates a single built-in biasing resistor (R1) with a nominal value of 2.2 kΩ. The device operates within a collector-emitter voltage range of up to 50 V and supports a maximum continuous collector current of 100 mA. Electrical characteristics include a DC current transfer ratio (hFE) ranging from 100 to 600 at IC = 1mA, VCE = 5V, and a gain-bandwidth product (fT) of 250 MHz. Thermal performance allows for power dissipation of 200 mW and operation across a temperature range of -55°C to +150°C.

Feature Summary

• Integrates a single built-in biasing resistor (R1 only) to simplify circuit design
• Utilizes epitaxial planar die construction for reliable performance
• Designed for automated assembly in surface mount packages
• Manufactured using halogen-free and antimony-free green materials

Applications

• General-purpose switching applications requiring simplified bias networks
• Driver circuits for low-power loads where space efficiency is critical
• Digital logic interface circuits utilizing pre-biased transistor configurations

Procurement Notes

Verify the specific ordering suffix against official manufacturer documentation to confirm packing quantity and carrier type. The standard reel size is 7 inches with a packing quantity of 3,000 units. Confirm RoHS compliance status and moisture sensitivity level requirements prior to procurement to ensure compatibility with assembly processes.

Selection Notes

Select this component when a compact NPN solution with integrated base resistance is required. Ensure the 2.2 kΩ internal resistor value aligns with the target drive current and input voltage levels. Verify that the SOT-323 package dimensions fit the available PCB real estate and that the thermal resistance characteristics meet the application's heat dissipation needs.

Part Context

This part belongs to the DDTC R1-only series from Diodes Incorporated, which provides various resistor values within the same SOT-323 footprint. The 'UA' suffix denotes the specific SOT-323 package configuration. Other variants in this family offer different nominal resistance values such as 1kΩ or 4.7kΩ while maintaining identical electrical ratings and physical dimensions.

Replacement Considerations

Direct substitutes within the same family include DDTC113TUA-7-F (1kΩ), DDTC143TUA-7-F (4.7kΩ), and DDTC114TUA-7-F (10kΩ). Cross-manufacturer replacements must match the NPN polarity, 50V/100mA ratings, SOT-323 package, and 2.2kΩ internal resistor value.