AVX enhances supercapacitor series for high temperature operation

Claimed to provide the highest DC capacitance and operating temperature of any T4-case capacitor, the TWD High-Temp Max-Cap (HTMC) axial leaded, hermetically sealed wet tantalum capacitors have been announced by AVX.

AVX has increased the maximum operating temperature for its TWD HTMC series from 125 to 175 degrees C. They are based on an established wet tantalum design, and are claimed to 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, says AVX, and delivers electrical and mechanical stability for extended lifetimes of up to 10,000 hours at +105 degrees C and rated voltage and, for the 25mF/10V rating, up to 2,000 hours at +175 degrees C and derated voltage.

The increased temperature range means that applications for TWD HTMC series capacitors now extend to DC hold-up and low frequency pulse circuitry in avionics, defense, specialised 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. They can also be used in high-temperature oil and gas market applications, including down-hole drilling equipment, that require proven high-reliability performance at temperatures in excess of 125 degrees C.

TWD HTMC series capacitors have a ±10 per cent and ±20 per cent capacitance tolerance, in a single case size, the 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 (+0.79mm 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.


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