The MMDT5211W is a Bipolar Transistor Pre-Biased Digital Transistor with SOT-323 package, manufactured by Diotec. It is a dual transistors designed for use in such applications as driver stages, low-current digital logic circuits, display drivers, amplifier stages, and current switches. It operates within a 50V power supply and features a maximum continuous current of 100mA. It provides built-in current source, complementary to the base current, which provides a pre-biased operation point. The junction temperature range for the MMDT5211W Bipolar Transistor is -55 to +150 °C.