AVX announces a series of axial leaded, hermetically sealed wet electrolytic tantalum capacitors that achieve supercapacitor CV values in environments up to +125°C. Utilising high CV tantalum powders and a well-established wet tantalum design, the TWD High Temp Max Cap (HTMC) series capacitors deliver exceptional electrical and mechanical stability, achieving extended operational lifetimes of up to 10,000h at +85°C, rated voltage.
Combined with extremely high capacitance values spanning 25 to 50mF and a wide operating temperature range from -55 to +125°C, the extended endurance of the TWD HTMC series makes the capacitors suited 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.
Chris Reynolds, Technical Marketing Manager, AVX, commented: "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."
Packaged in T4 axial leaded cases, TWD HTMC series capacitors are currently available rated for 50mF, 6.3V and 25mF, 10V, -55 to +125°C and 10,000 hours at 85°C and rated voltage. Additionally, a third rating of 150mF, 2.5V, -55 to +125°C and 2,000 hours at 85°C and rated voltage is in active development.
TWD HTMC series capacitors are available with a ±10 and ±20% capacitance tolerance, with or 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. Lead time for the series is 14 weeks.