Ceramic capacitors

The failure rate predicted with the FIDES Guide 2004A for ceramic capacitors with high C.V product is sometimes very high, especially if the life profile has strong thermal cycling.

This high failure rate is the expression of the technological difficulty to have a high capacity with a strong insulation in a small package with ceramic capacitor. Nevertheless, the failure rate predicted with FIDES is perhaps too penalizing for ceramic capacitor with high C.V product (and especially for type 2 ceramic capacitors).

Therefore, as a palliative way, if the C.V product of a capacitor is not at technological limit for its size, it may be acceptable to asses it as medium C.V product.

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