SMD tantalum capacitors rated to 10,000 hours at 200°C

23rd February 2015
Nat Bowers

AVX has extended the lifespan of its THH 230°C hermetic series high temperature SMD tantalum capacitors to 10,000 hours at 200°C and 50% derating. Providing high capacitance values from 22 to 100µF, the capacitors feature the highest temperature ratings of any SMD tantalum capacitor series available on the market: -55 to +230°C for 9/CTC-21D case components and -55 to +215°C for I case components.

Encased in hermetically sealed ceramic packages, the THH series capacitors exhibit superior stability when exposed to high temperatures, high humidity and ambient atmosphere. They are impervious to the capacitance drop common to high temperature operation, enabling significant size reductions, lower component counts and reliability improvements in extremely high temperature applications, such as down-hole oil drilling.

The capacitors also exhibit excellent volumetric efficiency and low leakage current of 0.01CV. They are manufactured and screened using AVX’s patented and extremely effective Q-Process, which ensures the removal of any components that may experience parametric shifts through customer processing or display instability through life testing. This enables an impressive FIT rate of 1% per 1,000 hours at 85ºC and rated voltage with 0.1Ω/V series impedance.

Allen Mayar, Product Marketing Manager, AVX, commented: “The high temperature capabilities and excellent volumetric efficiency of the THH 230ºC hermetic series capacitors provide engineers with higher capacitance in a smaller package than many comparable components, which significantly extends the design flexibility of circuits in a wide variety of very high temperature applications."

The capacitors rated for 47µF/63V and 100µF/35V are currently available in 9/CTC-21D cases with gold-plated undertab, gold plated L-shape J-lead and nickel-plated J-flex J-lead terminations. 6.8µF/35V, 10µF/35V, 22µF/16V and 47µF/16V capacitors in I cases are also available as engineering samples and 25 more codes in both case sizes are actively under development. The completed series will be available in capacitance values of 3.3-330µF, voltages of 16-63V and six case size/termination combinations ranging in size from 11.9x6.0x3.0 to 12.10x12.5x6.5mm.

“In addition to the newly extended 10,000-hour lifespan available on selected codes at 200ºC and 50% derating, which extends the range of high-reliability applications for which the series is ideal, these capacitors provide engineers with outstanding mechanical robustness and performance - proven with extensive mechanical shock, vibration, operating life and moisture resistance testing - that far surpasses what comparable capacitors molded in standard epoxy resin can provide,” added Mayar.

The THH series capacitors are supplied in either waffle or bulk packaging, and lead time for the series is 14 weeks.

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