This is a Polymer Safety Capacitor with a voltage rating of 400/250V, capacitance of 2200pF, temperature coefficient of Y5V, and a tolerance of 20%. It has a Lead Spacing (LS) of 10mm and is manufactured by Kemet, carrying the part number C921U222MUVDBAWL35. It functions as a surge suppressor and transient voltage protection device and is used in applications where overvoltage, ac line filtering and noise attenuation control are needed.