Conduction loss and gain at operating point
The ZXTN19020DZTA: The DC current gain (hFE) minimum is 300 at 100 mA, 2 V, indicating strong beta retention well into the ampere range. Transition frequency is 160 MHz, adequate for switching regulators and DC-DC converters operating in the hundreds of kilohertz range where the transistor's capacitive switching losses remain manageable.
Package and board-fit for SOT-89-3
The SOT-89-3 (TO-243AA) footprint occupies roughly 4.5 mm × 4.0 mm on the PCB, with the collector tab on the backside pad for thermal conduction. The supplier device package is SOT-89-3, and the part is offered in Tape & Reel (TR) for volume pick-and-place or Cut Tape (CT) for prototyping.
ROHS3 compliance is documented by Diodes Incorporated.