Polytech / Vishay
The Vishay Polytech product portfolio includes molded tantalum chip capacitors with manganese dioxide cathodes, molded tantalum chip capacitors with polymer cathodes, and niobium capacitors. Features of Vishay Polytech capacitors include low equivalent series resistance (ESR), high reliability, high temperature performance, small size, and flatness. In June 2014, Vishay acquired Holy Stone Institute and its product portfolio to complement Vishays tantalum capacitor product portfolio.