Passives

Tantalum polymer chip capacitors rated for 10,000 hours

19th February 2015
AVX
Barney Scott

AVX has announced that its TCH Series hermetically sealed tantalum polymer chip capacitors, developed with the European Space Agency (ESA) for aerospace, defence and other high-reliability applications, are now rated for extended lifespans of up to 10,000 hours. The capacitors are sealed in ceramic cases filled with inert gases to eliminate material and performance degradation resulting from exposure to high temperature and humidity.

The capacitors also feature low ESR conductive polymer electrodes and exhibit low derating capabilities, low leakage current (0.1CV), high ripple current, high capacitance (22-680µF), and the highest voltages (10-100V) of any space-grade SMD tantalum polymer capacitor currently available on the market.

Manufactured and screened using AVX’s Q-Process, which ensures the removal of any components that may experience parametric shifts through customer processing or display instability through life testing, TCH Series capacitors exhibit an impressive FIT rate of 1% per 1,000 hours at 85ºC and rated voltage with 0.1Ω/V series impedance, making them ideal for use in a variety of high-reliability applications, including: aerospace, defense, pulse power, and power supplies.

Rated for use in temperatures spanning -55 to +125ºC, and housed in large CTC-21D cases that weigh a slight 2.4g each, enabling a significant payload reduction when employed in aerospace power supplies, AVX’s TCH Series hermetically sealed tantalum polymer chip capacitors are currently available with seven capacitance values (22, 47, 100, 150, 220, 330, and 680µF), five voltages (10, 16, 25, 35, and 100V), and two terminations: J-lead and undertab.

The dimensions for TCH Series capacitors with J-leads are: 11.5x12.5x6.15mm. Dimensions for TCH Series capacitors with undertab terminations are: 11.0x12.5x5.95mm. In addition, 33µF/75V and 680µF/16V TCH Series capacitors are currently available as engineering samples, and 16 more are actively under development. Components are supplied in either waffle or bulk packaging, and lead time for the series is 14 weeks.

“Although initially developed for a mission-critical ESA application that required both extremely high capacitance and very low ESR, which tantalum technology is especially well suited for, TCH Series capacitors are suitable for a wide range of high-reliability power applications, especially now that selected codes are rated for endurance of up to 10,000 hours,” said Allen Mayar, Product Marketing Manager, AVX.

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