DDTC114TUA-7

Overview

The DDTC114TUA-7 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 10 kΩ. The device operates within a collector-emitter voltage range of up to 50 V and supports a continuous collector current of 100 mA. Power dissipation is rated at 200 mW, with a thermal resistance from junction to ambient air of 625 °C/W. The component utilizes an SOT323 package and functions across an operating temperature range of -55°C to +150°C.

Feature Summary

• Epitaxial planar die construction for reliable performance
• Integrated single biasing resistor (R1 only)
• Surface mount package optimized for automated assembly
• Lead-free and fully RoHS compliant

Applications

• General-purpose switching applications
• Driver circuits requiring integrated base biasing
• Automotive electronics (requires specific AEC-Q qualification verification)

Procurement Notes

Verify the exact ordering suffix against official documentation, as variations such as -7-F indicate specific packing quantities and carrier types. Confirm compliance requirements including RoHS 3 and halogen-free status directly with the manufacturer or authorized distributors before procurement. Ensure the selected packaging matches the intended automated assembly equipment specifications.

Selection Notes

Select this component when a single NPN transistor with a fixed 10 kΩ base resistor is required in a compact SOT323 footprint. Verify that the 100 mA collector current and 50 V breakdown voltage meet the circuit demands. Consider the 200 mW power dissipation limit and ensure adequate thermal management on the FR4 PCB layout to maintain operation within the specified temperature range.

Part Context

This part belongs to the DDTC R1-only series from Diodes Incorporated, designed specifically for applications needing a single integrated biasing resistor. The 'UA' suffix denotes the SOT323 surface mount package. This series simplifies circuit design by reducing external component count compared to discrete resistor configurations.

Replacement Considerations

Direct substitutes must match the NPN polarity, 10 kΩ internal resistor, and SOT323 package. Verify electrical parameters such as VCEO, IC, and hFE against the original datasheet. Cross-reference with other manufacturers' equivalent pre-biased transistor offerings if availability is constrained.