By Heather Hamilton, contributing writer
AVX Corp. has extended the operating temperature range of its TWD High-Temp Max-Cap (HTMC) Series of axial-leaded, hermetically sealed wet tantalum capacitors from 125°C to 175°C. These capacitors are designed for use in oil and gas markets that require extreme temperatures, including use in down-hole drilling equipment. Other applications include DC hold-up and low-frequency pulse circuitry for avionics, defense, and specialized industrial thanks to their high capacitance, high operating temperature, and longer lifetimes than electric double-layer supercapacitors.
The improved capacitors offer the highest DC capacitance and operating temperature for any T4-case capacitor, according to AVX. The operating temperature range is –55°C to 175°C. The HTMC capacitors are available in two ratings (50 mF/6.3V and 25 mF/10V with a ±10% and ±20% capacitance tolerance), offering capacitance values that were previously only available via supercapacitors.
Key specifications:
- Operating temperature range of –55°C to 175°C
- Ratings of 50 mF/6.3 V and 25 mF/10 V
- Tolerance values of ±10% and ±20%
- RoHS- and lead-free-compliant
The capacitors also promise exceptional electrical and mechanical stability for extended lifetimes of up to 10,000 hours at 105°C and rated voltage. For the 25-mF/10-V parts, they offer stability up to 2,000 hours at 175°C and de-rated voltage.
The capacitors are available in DSCC size T4/AVX size E. Options include with or without an insulating sleeve and either Sn/Pb (60/40) plated or pure matte tin terminations. The case sizes measure 26.97 mm (+0.79 mm or –0.41 mm) in length, 10.31 mm in diameter with an insulating sleeve or 9.52 mm (±0.41 mm) without the sleeve. Terminals measure 57.15 mm (±6.35 mm). The capacitors are RoHS-compliant, lead-free-compliant, and can be used in automatic mounting and soldering.
The capacitors are available through AVX’s distributors: Digi-Key Electronics, Farnell element14, and Mouser Electronics. Lead time is 12 weeks.
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