The MPP224K2J1909148LC with CBB capacitors 220nF, through hole, P=15mm RoHS is a capacitor manufactured by Sincerity. It is an encapsulated capacitor made from two metallic plates separated by a dielectric layer. The plates are usually made of aluminum, which is a highly conductive metal. This capacitor has a dielectric constant of 220nF, which means it will store an electrical charge when connected to an electrical circuit. It has a through-hole construction, meaning that the connections are made by drilling a hole through the capacitor and running a wire or lead through it. The 15mm is the pitch or distance between leads, making it easier to mount on a board. The RoHS stands for Restriction of Hazardous Substances, certifying that it is free of lead, mercury, cadmium, hexavalent chromium, and some other hazardous substances.