Abstract: A capacitor assembly includes an aluminum electrolytic capacitor installed in a casing which is closed by a cover disc. Two metallic connecting elements, which are solid, are disposed in the cover disc. The connecting elements are connected to external connections through the use of a radially acting clamping connection.

Abstract: A servo drive includes a piezoelectric actuator contained in a drive housing. The actuator has an actuator stack surrounded by a hollow cylindrical spring element and an actuator casing disposed in the spring element. The spring element is clamped, together with the actuator stack, between an actuator cap and an actuator base. An elastic compound fills gaps between the drive housing and the spring element as well as between the spring element and the actuator casing, and damps an actuator motion. A piezoelectric actuator for the servo drive and a method of producing the piezoelectric actuator are also provided.