DDTC143TCA-7-F

DDTC143TCA-7-F is a NPN pre-biased transistor (also known as a digital transistor) from Diodes Incorporated's DDTC series. It integrates a 4.7 kΩ base resistor (R1) to simplify circuit design by reducing external component count. The device is rated for a maximum collector-emitter voltage of 50V and a continuous collector current of 100mA, with power dissipation up to 200mW.

The transistor features a DC current gain (hFE) of at least 100 at 1mA collector current and 5V VCE, and a low saturation voltage of 300mV at 250µA base current and 2.5mA collector current. The transition frequency is 250MHz, making it suitable for switching and amplification applications up to moderate frequencies.

It is housed in a compact SOT-23-3 surface-mount package, which is halogen-free and lead-free, compliant with RoHS 3 standards. Moisture sensitivity is Level 1 per J-STD-020, ensuring robust handling. The standard tape-and-reel packaging (3,000 units per reel) facilitates automated assembly.

Common applications include digital output interfaces, logic gate drivers, and microcontroller I/O expansion where a switched high-side driver is needed. The built-in resistor eliminates the need for an external base resistor, saving board space and assembly cost.