The PUMD48-QX is a bipolar transistor with pre-bias manufactured by Nexperia. It is SOT363/SC-88 packaged, has an integrated base-emitter voltage, and is used to reduce the amount of power dissipation in portable applications. It features low saturation voltage, low collector switch-on voltage, and fast switching performance thanks to its optimized structure design. This transistor is ideal for applications such as consumer electronics, automotive, medical applications, and industrial systems. It also has a high switching frequency and low ESR critical for applications such as hearing aids, mobile phones, and other portable devices.