Many X2 capacitors on the market have the words MPX and MKP printed on them. So what do the MPX and MKP printed on X2 safety capacitors mean?

In fact, MPX and MKP represent the material of capacitors, both of which use polypropylene film as the dielectric, and attach zinc aluminum alloy to the surface of the film through vacuum evaporation to form electrodes. Metallized Polypropylene Film EMI Suppression Capacitors X2 are formed by non inductive winding or stacking methods.

It has strong self-healing ability, high voltage resistance, good impedance frequency characteristics, high insulation resistance, low impedance, and is suitable for high-frequency, DC, AC, coupling, and cross pulse circuits.

Why do some have the word MKP printed on them, while others have the word MPX printed on them?

This is because each manufacturer has a different definition of the name for the safety X2 capacitor. Some manufacturers declare MPX and others MKP when declaring product categories. In fact, whether it is the safety X2 capacitor with the words MPX or MKP printed on it, they are all polypropylene film capacitors that use metalized polypropylene film as the material, and their use and application are the same. WEET X2 Capacitor 310VAC Pitch 10MM 15MM 22.5MM, 27.5MM.

Picture of 1uF Pitch 10MM Pitch 15MM 310V X2 Safety Capacitor.