The 2SD1898T100Q, manufactured by ROHM, is a bipolar (BJT) transistor NPN with a surface-mount MPT3 package. It has an operating voltage of 80 V and a maximum collector current of 1 A, with a maximum frequency of 100 MHz and a power dissipation of 2 W. The package is a 3-pin Surface Mount type and the pinout is Emitter (E), Collector (C) and Base (B). The device is typically used in switching applications as well as amplifiers, oscillators, and other applications. It is designed for applications requiring low noise, high-frequency performance.