The FDS6912A part is a Power MOSFET produced by ON Semiconductor. It is a 12A, 80V N-channel Power MOSFET, which is specifically designed to reduce switching losses and increase circuit efficiency. It is rated for a drain source voltage up to 80V, a maximum drain current of 12A, and a drain-to-source ON resistance of 0.33 ohms. The FDS6912A is ideally suited for a broad range of high efficiency, low voltage switch mode power supply (SMPS) applications, such as DC-DC converters, circuit protection, and load switching.