While we are all familiar with the ultra high temperature capabilities of multilayer ceramic capacitors and tantalum capacitors for use in applications such as down hole and aerospace circuits, in this post we take a look at 3 less familiar capacitor types also rated to operate at extreme upper temperature limits.

The Cornell Dubilier HHT series of axial leaded aluminum electrolytic capacitors is a unique glass-to-metal sealed device that is rated for 2,000 hours operating life at +175°C at rated voltage.

Their rugged construction make them an ideal choice for high capacitance aerospace, down hole, military and off-road transportation applications.

Their capacitance range is 470µF to 4,700µF and voltage range 16Vdc to 40Vdc.

The Type 911P capacitor from the Dearborn division of Exxelia is an axial leaded plastic film device rated to operate at +250°C  without voltage de-rating.

Manufactured from a polymer film that does not melt, it is packaged with a tape wrap and potting compound especially selected for extreme temperatures.

Rated voltage is 400Vdc and capacitance range is 0.10µF – 2.70µF.

Xtreme Temperature Silicon Capacitors (XTSC) from Murata are designed for applications subject to extreme conditions up to 250°C.

These high stability, high reliability silicon chip capacitors feature ultra low ESR and ESL ratings and low leakage currents.

Capacitance range is 47pF to 3.3µF and breakdown voltage is 11Vdc or 30Vdc.

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