A safety capacitor is a type of capacitor used for suppressing electromagnetic interference, reducing resistance and capacitance voltage, and DC filtering. It belongs to a type of safety capacitor, specifically a metalized thin film safety capacitor. According to different withstand voltage levels, it can be divided into three types: X1, X2, and X3, with X2 being the most common.

But do you know the manifestation of the damaged X2 capacitor failure mode?

1、 Appearance abnormality:

When the Class X2 Radial MKP 310 VAC - Standard Across the Line is damaged, there may be obvious appearance changes such as cracking, burning, bulging, etc. Cracking may be caused by overvoltage, overcurrent impact, etc., which damage the structure of the capacitor; Burning indicates that the capacitor has experienced overheating, possibly due to prolonged abnormal operation; Bulging is caused by an increase in internal pressure, resulting in deformation of the capacitor casing.

2、 Changes in electrical performance:

Changes in the capacitance value of X2 Class Safety Certified Capacitors, whether they become larger or smaller, can affect the normal operation of the circuit. For example, in a filtering circuit, a change in capacitance may lead to a decrease in filtering effect and an increase in clutter in the circuit. If a short circuit occurs, it will cause an abnormal increase in circuit current, which may lead to damage to other components. If the X2 Safety Capacitor with Discharge Resistor is completely open, it is equivalent to a circuit break at the location where the capacitor is located in the circuit, and the relevant circuit functions cannot be realized.

3、 Causing circuit malfunction:

In some circuits that require high stability, damage to safety capacitors may lead to unstable circuit operation and intermittent faults. For example, in switch mode power supply circuits, X2 capacitors for high-temperature requirements faults may cause significant fluctuations in output voltage, affecting the normal power supply of backend devices. In severe cases, it can even cause the entire device to fail to start, as safety capacitors play a critical role in the circuit, and their damage can disrupt the normal working conditions of the circuit.