230°C tantalum capacitors offer 2,000-hour lifetime

Article By : EE Times India

The capacitors are available with capacitance values spanning 6.8µF to 100µF and voltage ratings spanning 16V to 63V.

AVX has doubled the lifetime of select THH 230°C Hermetic Series of high temperature SMD tantalum capacitors. Four of the six ratings available today offer 2,000-hour lifetimes at 230ºC and 0.5VR, while all six devices recently completed mechanical shock and vibration testing to MIL-STD-202 at 230ºC with 20g peak.

Hermetically sealed in ceramic cases with MnO2 cathodes, THH series tantalum capacitors exhibit extremely stable performance, according to AVX.

When compared with other high temperature capacitor solutions currently available, such as 200°C wet tantalum, the THH series features volumetric efficiency, shows no capacitance drop-off at even extremely high temperatures and exhibits superior stability in high temperature, high humidity and ambient atmosphere environments, according to the company.

The THH 230°C Hermetic Series capacitors also exhibit low leakage current (0.01CV) and are manufactured and screened using AVX’s patented Q-Process, which requires statistical lot acceptance over a wide range of parameters above and beyond standard test limits.

The capacitors are available with capacitance values spanning 6.8µF to 100µF, voltage ratings spanning 16V to 63V and minimum operating lifetimes of 1,000 or 2,000 hours at 230°C and 0.5VR, and 10,000 hours at 200°C and 0.5VR. Operating temperatures for the series span -55°C to 230°C, while its maximum ESR is 500mΩ at 100kHz.

Offered in two large, hermetically sealed ceramic packages—9/CTC-21D for higher capacitance (47–100µF at present) and “I” for a lower maximum profile (3.00mm vs. 6.5mm)—the capacitors may be supplied with gold-plated undertab terminations, gold-plated L-shape J-lead terminations and nickel-plated J-lead flex terminations.

The “I” case THH Series capacitors are currently available with 6.8µF/35V, 6.8µF/50V, 10µF/35V and 22µF/16V ratings. The series’ 9/CTC-21D sized capacitors are currently available with 47µF/63V and 100µF/35V ratings.

The “I” case capacitors rated for 47µF/16V are currently available as engineering samples and eight additional codes spanning both case sizes are actively under development. THH Series capacitors are supplied in either waffle or bulk packaging, and lead-time for the series is currently 12 weeks.

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