DDTC144TUA-7

Overview

The DDTC144TUA-7-F is an NPN pre-biased small signal surface mount transistor from Diodes Incorporated, featuring a built-in biasing resistor (R1 only) with a nominal value of 47 kΩ. It utilizes epitaxial planar die construction and operates within a collector-emitter voltage range of up to 50 V and a continuous collector current of 100 mA. The device supports a power dissipation of 200 mW at +25°C and functions across a temperature range of -55°C to +150°C. Packaged in a compact SOT323 format, it offers a DC current transfer ratio (hFE) ranging from 100 to 600 and a gain-bandwidth product of 250 MHz.

Feature Summary

• Epitaxial planar die construction for reliable performance
• Integrated single input biasing resistor simplifies circuit design
• Surface mount package optimized for automated assembly processes
• Fully compliant with RoHS standards and free from halogen and antimony

Applications

• Automotive applications requiring specific change control protocols
• General-purpose switching circuits utilizing surface mount technology
• Pre-biased transistor stages in consumer electronics

Procurement Notes

Verify the exact ordering suffix against official documentation to confirm packing quantity and carrier specifications. Confirm compliance requirements such as RoHS 3 and REACH status prior to procurement. Ensure that the selected variant matches the required marking code and reel size for your manufacturing line. Cross-reference the active status directly with the manufacturer's latest catalog to avoid obsolete stock.

Selection Notes

Select this component when a single NPN pre-biased transistor with a 47 kΩ input resistor is required in an SOT323 package. Consider the 200 mW power dissipation limit and the 50 V maximum voltage ratings during thermal and electrical design. Verify that the 100 mA continuous collector current meets the load requirements. Check the hFE range and fT specifications against the application's frequency and gain needs.

Part Context

This part belongs to the DDTC (R1-ONLY SERIES) UA family manufactured by Diodes Incorporated. The series includes various resistor values ranging from 1 kΩ to 200 kΩ, all sharing the same NPN transistor characteristics and SOT323 packaging. The 'UA' designation specifically indicates the SOT323 surface mount package type used for these pre-biased devices.

Replacement Considerations

Direct substitutes within the same family include DDTC144TUA-13-F, which shares identical electrical characteristics but differs in packing quantity (10,000 units on a 13-inch reel). Other R1-only variants like DDTC124TUA or DDTC114TUA are electrically compatible regarding the transistor but feature different nominal resistor values.