... ,Class B,Lower residual,large discharge current 3,Low Voltage Surge Protector Low Voltage Surge Protector SUN-DB40/4 Key words : ... Arrester,Lightning Surge Protector,Surge Protective Device,Surge Protection Product introduce and application: SUN-type surge protector(hereinafter ... surge protector to use non-linear components and low residual voltage,small discharge current,modulus,and using safely and ...