Ceramic Capacitor Vibration

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.

Ceramic capacitor vibration.

Singing capacitors piezoelectric effect abstract in some applications design engineers are finding a vibration or low audible hum coming from certain ceramic capacitors. For example the noise sounds like a hum hiss or a. Among failure modes there are open circuit failures and short circuit failures. By the equipment manufacturer if necessary.

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. There is almost no noise generated by the capacitor itself. Applications where vibration resistance is critical are becoming more common and manufacturer panasonic is responding with vibration proof components in their capacitor ranges. Vibration resistance is also greatly enhanced by the panasonic anti vibration features along with the reduced height volume and weight.

Ceramic capacitors faq. This faq will discuss some aspects of this singing capacitor phenomena. 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.