This document describes the features and characteristics of the 2SK2640-01MR N-channel MOS-FET FAP-IIS Series 500V 0.9Ω 10A 50W, including high-speed switching, low on-resistance, no secondary breakdown, low driving power, and high voltage. It is suitable for applications such as switching regulators, UPS, DC-DC converters, and general-purpose power amplifiers.