The RB055L-30GTE25 is a power MOSFET transistor manufactured by ROHM. It has a breakdown voltage of 55V, a maximum drain current of 30A, and a threshold voltage of between 1.7V and 2.5V. It is designed for applications such as motor drive, DC-DC converters, and load switching in power distribution systems, and features low on-resistance, a low gate charge, and fast switching.