T491X107K025AT is a surface mount tantalum capacitor manufactured by Kemet and features a 25V DC rating, a capacitance value of 100 uF, and a tolerance of +/-10%. It also comes with an ESR (equivalent series resistance) of 300 milliohm. This part is ideal for filtering and decoupling applications, and its solid electrolyte allows for extended operation in high-temperature environments. Additionally, its low ESR makes it suitable for high-frequency and transistor circuit applications.