This is a 100pF, 2kV, RoHS-compliant, 1206-sized, multi-layer ceramic capacitor (MLCC), manufactured by Walsin. The part number is 1206N101J202. It is a surface-mount device (SMD/SMT), meaning it is designed to be placed directly onto the printed circuit board, as opposed to a through-hole type component, which requires placement through holes in the board. This capacitor is suitable for a variety of applications, including signal filtering, tuning and bypassing, as well as decoupling.