Along with the development of modern high-tech industry, lots of high-grade equipment constantly applied in all walks of life and modern people's life, such as communication, electronics, power, etc., and surge especially lightning surge has seriously harming these modern equipment operation of the plant and reliable and stability and security, and even the human life safety and quality of life, shenzhen sensun technology Co., LTD. For power and communications industry application requirements, launched SY1 and SY2 two big series surge protector, its normal product maximum operation voltage 420V, maximum discharge current 100kA, customized products maximum operation voltage is can reach up to 500V, maximum discharge current can reach for the masses of users 150kA, provide round-the-clock surge protection.