MU Polymer Multi-Layer Capacitors Rubycon MU Polymer Multi-Layer Capacitors (PMLCAP) feature a miniaturized version of conventional multi-layer film capacitors. The MU capacitors deliver a high capacitance, excellent frequency, and a low leakage current within a small package size. The Rubycon MU PMLCAPs add increased value to various applications, including audio, visual, communication, and wearable equipment. The capacitors are surface-mountable and constructed with multiple polymer layers. Using a dielectric resin, the PMLCAPs provide a high heat resistance for environmental power generation applications.