The RU20P3B with MOSFET P Trench is a small form factor, three-pin, RoHS compliant MOSFET (metal-oxide semiconductor field effect transistor) manufactured by Ruichips. It has a 20V drain to source voltage capacity, and has a current rating of up to 3A. The gate-source breakdown voltage is 1V. It has a Rds(on) of only 0.25mA and its Vgs(th) (gate-source threshold voltage) is 4.5V. Its package type is SOT-23-3, the most common form factor for small-signal, low-power MOSFETs. It is used in electronics for many applications, such as voltage regulation, switching, and audio.