Ceramic Capacitor Vibration

Applications where vibration resistance is critical are becoming more common and manufacturer panasonic is responding with vibration proof components in their capacitor ranges.

Ceramic capacitor vibration.

Under the following status the vibration and or shock may be applied to a capacitor. By the equipment manufacturer if necessary. Take the measures of fixing the capacitor etc. A ceramic capacitor is a fixed value capacitor where the ceramic material acts as the dielectric it is constructed of two or more alternating layers of ceramic and a metal layer acting as the electrodes the composition of the ceramic material defines the electrical behavior and therefore applications.

This faq will discuss some aspects of this singing capacitor phenomena. Ceramic capacitors faq. Among failure modes there are open circuit failures and short circuit failures. When a crack occurs on the element of an mlcc multilayer ceramic chip capacitor due to depaneling of the print circuit board screw fastening or shock from a vibration or a drop it may lead to a short circuit failure.

However when a capacitor is mounted on a board the vibration increases and when the cycle of the amplitude reaches the audible frequency range 20hz 20khz of humans it can be heard as a noise. Singing capacitors piezoelectric effect abstract in some applications design engineers are finding a vibration or low audible hum coming from certain ceramic capacitors. Vibration resistance is also greatly enhanced by the panasonic anti vibration features along with the reduced height volume and weight. Since the body of a capacitor consists of ceramic if a mechanical shock is applied directly the capacitor may be damaged and a crack may be generated.