The FN15N180J500PNG is a Multilayer Ceramic Capacitor (MLCC) - Surface Mount Device/Surface Mount Technology with an 18pF capacitance rating, 50V voltage rating, and 0402 package size and is RoHS compliant. It is manufactured by the company Prosperity and is composed of a multilayered ceramic body. It is designed for use in a variety of SMD applications, including filters, decoupling, blocking, timing circuits, and memory back-up. It features good frequency and temperature stability, low ESR, and high reliability.