New series of axial leaded, hermetically sealed, wet electrolytic tantalum capacitors

AVX Corporation has released a new series of axial leaded, hermetically sealed, wet electrolytic tantalum capacitors that achieve supercapacitor CV values in high temperature environments up to 125C. Utilising high CV tantalum powders and a well-established wet tantalum design, TWD HTMC Series capacitors deliver exceptional electrical and mechanical stability, achieving extended operational lifetimes of up to 10,000 hours at 85C, rated voltage. Combined with extremely high capacitance values spanning 25mF to 50mF and a wide operating temperature range spanning -55C to +125C, the extended endurance of the new capacitors makes them ideal for use in DC hold-up and low frequency pulse circuitry in avionics, defence, specialised industrial, and other high reliability applications that require high capacitance at higher temperatures and for longer lifetimes than EDLC (electric double-layer capacitor) supercapacitor technologies can currently deliver. "The high CV tantalum powders used to develop our new TWD HTMC Series allow us to achieve extremely high capacitance values well within the supercapacitor range, and the hermetic packaging provides high mechanical stability that enables their use in a variety of high temperature, high reliability, and long life applications," said Chris Reynolds, technical marketing manager, AVX. Packaged in T4 axial leaded cases, capacitors are currently available rated for 50mF, 6.3V and 25mF, 10V, -55C to +125C, and 10,000 hours at 85C and rated voltage. Additionally, a third rating of 150mF, 2.5V, -55C to +125C, and 2,000 hours at 85C and rated voltage is in active development. TWD HTMC Series capacitors are available with a ±10% and ±20% capacitance tolerance, with and without an insulating sleeve, and with either Sn/Pb (60/40) plated or pure matte tin terminations. The series is also lead-free reflow compatible and RoHS compliant, and is suitable for automatic mounting and soldering.