Safety Capacitance Knowledge Essentials (1)

1. Safety capacitors for suppressing electromagnetic interference of power supply

When using a safety capacitor to eliminate noise in a power-over line circuit, not only the normal voltage, but also the generation of abnormal pulse voltages (such as lightning) must be considered, which may cause the capacitor to smoke or catch fire. Therefore, the safety standards for over-the-line capacitors are strictly regulated in different countries, so safety-certified safety capacitors must be used.

2. DC capacitors are not allowed to be used as jumper capacitors

Capacitors for X2 class suppression power supply electromagnetic interference should be applied to the case where the capacitor does not cause a shock hazard when the capacitor fails, such as the power supply across the line connection, can withstand a pulse voltage of 2.5kV.