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Tuesday, March 31, 2015

CalRamic HV Ceramic Capacitor Educational Series 109-4

Ceramic Material Designations

Electronics Industry Standard (EIA) 198 is a US Government document that categorizes various ceramic dielectric materials by their temperature coefficient (ΔTC). Classifications are organized into two basic groupings based on whether they exhibit either extremely stable Class I, or stable / semi-stable performance characteristics (Classes II, III and IV).

Classes I and II represent the more commonly utilized dielectrics, with Class III a distant third and Class IV limited to only a few remote applications where capacitor stability is not a critical component of the system design. For the purpose of this Application Note, information is limited to Class I, Class II and Class III capacitors as outlined in the complete application note:

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