Maximum temperature of wet tantalum supercapacitors increased

Manufacturer and supplier of advanced electronic components, AVX Corporation, has increased the maximum operating temperature for its TWD High-Temp Max-Cap (HTMC) Series axial leaded, hermetically sealed wet tantalum capacitors from 125 to 175°C.

Based on a well-established wet tantalum design, the newly improved TWD HTMC Series capacitors provide the highest DC capacitance and the highest operating temperature of any T4-case capacitor available on the market. Currently available in two ratings, 50mF/6.3V and 25mF/10V, the series achieves high capacitance values previously only offered by supercapacitors and delivers exceptional electrical and mechanical stability for extended lifetimes of up to 10,000 hours at +105°C and rated voltage and, for the 25mF/10V rating, up to 2,000 hours at +175°C and derated voltage.

Ideal applications for TWD HTMC Series capacitors now extend to high temperature oil and gas market applications, including down-hole drilling equipment, that require proven high reliability performance at temperatures in excess of 125°C. The series is also well suited for use in DC hold-up and low frequency pulse circuitry in avionics, defense, specialized industrial, and other high reliability applications that require high capacitance at higher temperatures and for longer lifetimes than electric double-layer capacitor (EDLC) supercapacitor technologies can currently deliver.

Mitch Weaver, Technical Staff at AVX, stated: “Made using high quality tantalum powders and established designs, our field-proven HTMC Series hermetically sealed wet tantalum capacitors deliver exceptional electrical and mechanical performance and long-lifetime durability in a range of high temperature, high reliability applications that now extends to the oil and gas industry.”

TWD HTMC Series capacitors are now rated for operating temperatures extending from -55 to +175°C and are available in two ratings: 50mF/6.3V and 25mF/10V, with a ±10% and ±20% capacitance tolerance, in a single case size: DSCC size T4/AVX size ‘E’, with or without an insulating sleeve, and with either Sn/Pb (60/40) plated or pure matte tin terminations.

The cases measure 26.97mm (+0.79 or -0.41mm) in length, 10.31mm in diameter with an insulating sleeve or 9.52mm (±0.41mm) in diameter without, and have 57.15mm (±6.35mm) terminals. The capacitors are also RoHS compliant, lead-free compatible, and suitable for use with automatic mounting and soldering processes. Lead time for the series is 12 weeks.