What is a Murata polymer aluminum electrolytic capacitor? There are two kinds of polymer aluminum capacitors: the “surface mount” type (also known as H-Chip), designed with a multilayer aluminum foil structure, and the “Can” type (also known as V-Chip), which consists of a rolled aluminum structure. Murata's H-Chip type ECAS Series is made with a resin molded case structure, and consist of multilayer aluminum foil for anode and solid conductive polymer for negative cathode. Traditional liquid and rolled type of aluminum electrolytic capacitors use aluminum foil, an oxidized Al dielectric, and liquid electrolyte. On the other hand, conventional tantalum capacitors have tantalum metal, tantalum pent-oxide dielectric and a solid magnesium dioxide electrolyte. Notable disadvantages with the “Can” type is a taller profile, high inductance, and poor performance at high frequencies. Polymer tantalums use sintered tantalum pellets, where the tantalum has lower conductivity than the Al in the ECAS. This allows the ECAS to have noticeably lower ESR than polymer tantalums.