X capacitor

In power circuits, among the capacitors installed on the primary side for purposes such as removing noise, those installed between phases. Also called across-the-line capacitors. Although X capacitors pose less risk of electric shock compared to Y capacitors when they fail, there is a risk of equipment damage, electric shock, or fire due to current flowing through a phase-to-phase short circuit, so strict standards are in place. The standards for X capacitors include JISC5101-14 for domestic regulations and IEC60384-14 for international standards.