Ceramic capacitors qualified for defence and aerospace applications

Posted By : Lanna Cooper
Ceramic capacitors qualified for defence and aerospace applications

According to KEMET it is the first and only supplier to offer both Class-I and Class-II Base Metal Electrode (BME) MultiLayer Ceramic Capacitors (MLCCs) qualified for defence and aerospace applications by the Defense Logistics Agency (DLA). The DLA recently accepted KEMET's X7R dielectric MIL-PRF-32535 for 'M' and 'T' reliability levels.

The MIL-PRF-32535 is the first DLA capacitor specification for defence and aerospace that capitalises on Base Metal Electrode (BME) technology.

In December 2017, KEMET announced DLA approval for C0G and BP Class-I dielectrics which are ideal for critical timing, tuning, pulse, AC, and transient voltage suppression applications where capacitance stability may be a concern.

With the recent DLA approval of KEMET’s X7R Class-II dielectric, design engineers will now have access to ceramic capacitors that offer up to a 55-fold increase in capacitance values as compared to the offerings under traditional specifications using Precious Metal Electrodes (PME). These capacitors are suitable for decoupling, bypass, filtering, and bulk storage for military, avionics and space applications.

The MIL-PRF-32535 is also the first DLA specification to recognise a flexible termination option. KEMET's flexible termination utilises a pliable conductive silver epoxy in the termination system. The addition of this epoxy layer inhibits the transfer of board stress to the rigid ceramic body, therefore mitigating flex cracks that can result in low insulation resistance or short circuit failures.

“KEMET has been a leader in BME ceramic capacitor development for over 20 years,” said Dr. Abhijit Gurav, KEMET Vice President of Ceramic Technology.

“These new Class-I and Class-II capacitor ranges were qualified through the extremely stringent requirements of the MIL-PRF-32535 specification, and still offer significantly higher capacitance values than the MIL-PRF-123 and 55681 specifications. This enables more circuit functionality in defence and space applications while allowing significant component miniaturisation and payload weight reduction.”

Downloads


You must be logged in to comment

Write a comment

No comments




Sign up to view our publications

Sign up

Sign up to view our downloads

Sign up

Sensor+Test 2019
25th June 2019
Germany Nürnberg Messe
DSEI 2019
10th September 2019
United Kingdom EXCEL, London
European Microwave Week 2019
29th September 2019
France Porte De Versailles Paris
Engineering Design Show 2019
16th October 2019
United Kingdom Ricoh Arena, Coventry
ELIV 2019
16th October 2019
Germany Bonn World Conference Center