DDTC143ZUA-7-F

The DDTC143ZUA-7-F is an NPN pre-biased transistor from Diodes Incorporated, designed for surface mount applications. It integrates base biasing resistors R1 (4.7 kΩ) and R2 (47 kΩ), simplifying circuit design by reducing external component count.

Key electrical specifications include a collector-emitter breakdown voltage (VCEO) of 50 V, a collector current (IC) rating of 100 mA, and a power dissipation of 200 mW. The DC current gain (hFE) is a minimum of 80 at Ic=10mA, Vce=5V, and the saturation voltage (VCE(sat)) is 300 mV maximum at Ib=250µA, Ic=5mA. The transition frequency (fT) is typically 250 MHz.

The transistor is housed in a SOT-323 package (equivalent to SC-70), which is suitable for automated assembly. The package is molded plastic with green molding compound, UL 94V-0 rated. It is fully RoHS compliant, lead-free, halogen and antimony free. Moisture sensitivity level is 1 (unlimited). Standard packaging is 3000 units per 7-inch reel with 8mm tape width.

This pre-biased transistor is ideal for switching and amplifier circuits where space and component count are critical. The built-in resistors ensure consistent biasing and reduce manufacturing variability. Applications include general purpose switching, signal amplification, and interface circuits in consumer and industrial electronics.