Wet Tantalum Capacitor, Button, All-Tantalum Case, Non-Polar, - 55 °C To + 125 °C Operation

This conveniently-packaged non-polar button unit employs a non-solid electrolyte, and has a sintered tantalum anode. The anode is produced from medium capacitance powder and the lower CV product allows a tighter specification of capacitance stability, dissipation factor and leakage current. The cathode is also of tantalum, and overcomes the restrictions of a silver cathode system in allowing a high ripple current rating. The ANP2 capacitor is based upon the CH capacitor design, but with twin tantalum electrodes made of sintered compacts of high purity tantalum powder. The dielectric layer of tantalum pentoxide is formed on each compact to withstand rated voltage. This enables the capacitor to be used where DC bias may fluctuate positively or negatively. The system is then enclosed between a tantalum plate and a tantalum cup, with an outer nickel case. The seal is a highly efficient system comprising a PTFE gasket clamped between coined plates of tantalum by a work-hardened nickel ring. This type of seal, common to all button styles, is largely responsible for their long life and high reliability under severe military environments. By Vishay Intertechnology