The MMDT5112W is a low-power, pre-biased digital transistor manufactured by Diotec. It is housed in a small SOT-323 package and features an operating voltage of 50V and a current rating of up to 100mA. This bipolar transistor has two distinct emitter-base junctions, which allow it to quickly switch between two different levels of current. It is well suited for low-frequency logic circuits, driver circuits, and small signal circuits.