P surging protector (hereinafter referred to as protector) is up to the standard of IEC61643. It is mainly applied to limiting &#118alue of transion over voltage, absorbing, consuming, discharging surging current energy in the electric wiring or AC 50HZ or 60HZ, rated working voltage 230V, surging through flow capacity not more than 50A. It is used in the occasion of higher type of over voltage which can make the protected electrical component transfer from one type of over voltage to another lower type of over voltage. It is adapted for composing combined electrical equipment with other module terminal electrical equipment so that it can increase installation types and expand range of use, or further step down over voltage on using terminals to protect TV set, hi-fi sound and such kinds of electrical appliances or the thunder direct stroke or protecting from the damage of the surging current caused by outdoor arrester.