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What Are The Main Differences Between The X Capacitors? - News

What Are The Main Differences Between The X Capacitors?

259 Published by at May 31,2021

X capacitors are safety capacitors. This type of capacitor complies with safety standards and has passed safety standards testing/certification. Therefore, even if this type of capacitor fails, it will not cause electric shock and will not endanger personal safety. In addition, it is made of flame-retardant materials and only It produces explosions, no sparks, only gas.

The X capacitor is a capacitor connected between the live wire and the neutral wire. It is usually only used for filtering in anti-interference circuits, and mainly for filtering differential mode interference.


X capacitors are divided into X1, X2, and X3. The main differences are:



Allowable peak pulse voltage

Overvoltage level





High pulse




General purpose




General purpose


X capacitors usually use metalized polypropylene film capacitors (MPX), and usually use polyester film capacitors with relatively large ripple current resistance. This type of capacitor has a large volume, but it allows a large current for instantaneous charging and discharging, and its internal resistance is correspondingly small. X capacitor adopts plastic package, square structure and internal high-voltage OPP material (made of metalized polypropylene material coiled wire). OPP material not only has better electrical performance, but also is connected in parallel with the input end of the power supply, which can effectively reduce high frequency The effect of pulse on power supply.

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