Knowing how safety capacitors operate and the importance of their reliability under high AC voltages and lighting strikes, a proper definition for safety capacitors can be provided. A safety capacitor is a capacitor that is designed to aid in the filtering of AC line voltages and can be safely used on line-to-line, line-to-neutral, and line-to-ground applications. These capacitors must be able to properly filter out EMI, be able to survive voltage transients such as lighting strikes, and operate reliably under constant high AC voltages. Now, even though many people call them Safety capacitors, it is also acceptable, and more accurate to call them interference suppression capacitors since they suppress interference or suppress EMI. Another key feature of these capacitors is that they are qualified and certified to internationally recognized safety standards.