The MMBTRA104SS is a pre-biased digital Bipolar Transistor in a SOT-23 surface-mount package manufactured by Diotec. It has a maximum voltage rating of 50V and a maximum current rating of 100mA. It is designed to provide protection against static electricity, over-voltage protection and low-noise. It is compatible with lead-free and most non-lead-free soldering processes. This Bipolar Transistor is ideal for applications such as power management, analog/mixed-signal designs, and circuit boards.