SMD Tantalum Capacitors Break Limit of 200degC for Continuous Operation

SMD Tantalum Capacitors Break Limit of 200degC for Continuous Operation
Written By: R. Faltus | T. Zedníček

Abstract:
Capacitors are one of the key parts of any electronic device and system. The main functions of capacitors include power supply voltage smoothing, supporting energy sources when high current pulse is demanded, blocking a DC voltage in signal pathes, filtering, etc. To assure required functionality of a system we cannot omit capacitors and it is valid for high temperature applications as well. In oil and gas mining industry a high temperature capacitors are needed for DC/DC converter of drilling heads that are subjected to rising ambient temperature with depth. Thus the higher permitted operating temperature of used capacitor and other passive and active parts, the deeper situated resources are accessible.

Solid tantalum capacitors have been known for their excellent reliability, robustness and stable parameters. Hence this is very suitable capacitor technology for further research and development targeting enhancing operating temperatures up to 200ºC. This paper describes a novel 200ºC capacitor concept and technical development & processes of enhancing operating temperature of solid tantalum capacitor. Stability of the main capacitor parameters at high ambient temperature is essential condition for valuable product.

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