High-temp, 150C, capacitors for automotive applications

October 13, 2014 // By Graham Prophet
Kemet has added through-hole ceramic capacitors for high temperature and automotive applications up to 150C: the Aximax product line uses an X8L dielectric for ultra-stable characteristics.

Aximax high temperature axial capacitors are based on the same Kemet material technologies used in the surface mount X8L and X8R dielectric platforms. The axial form factor now enables these technologies to be extended into high vibration environments.

Claimed as the first X8L dielectric in an axial form factor, Aximax X8L, is a conformally coated device designed to operate in environments reaching temperatures as high as 150C with capacitance up to 2.2 µF and rated voltages up to 50 V.

For applications sensitive to capacitance changes, such as filters, the Aximax Ultra-Stable X8R offers superior performance and more effective capacitance when compared to competitor X8R dielectric technologies. Kemet says its dielectric technology exhibits no capacitance loss with respect to applied DC voltage and negligible loss of capacitance as temperatures approach 150C. These X8R devices are available with rated voltages up to 200 V.

Applications include decoupling, bypass and filtering in extreme environments such as down-hole oil exploration, under-the-hood automotive, defence and aerospace. Both new Aximax products are lead-free, RoHS (without exemption) and REACH compliant and are available in Commercial and Automotive (AEC-Q200) Grades.

Kemet; www.kemet.com/Hi-Temp-Ceramic