The types of surge protectors produced by surge protection manufacturers are mainly divided into three types: voltage switch type, voltage limit type and composite type. The switching power surge protector is a surge protector that has a high impedance when there is no surge and can be transformed into a low impedance immediately when there is a surge. Its common components are a discharge gap, gas discharge tube, thyristor and three-terminal two-way Thyristor switching element, also known as a "short-circuit surge protector". Parameter 1, the types of surge protector The voltage-limiting surge protector has high impedance when there is no surge, but as the surge current and voltage increase, its impedance will continue to decrease. Its commonly used non-linear components are varistors and suppression diodes, also called "Clamping surge protector" The composite type surge protector is composed of voltage switching type and voltage limiting type components. Its characteristics can be expressed as voltage switching type, voltage limitation or both according to the characteristics of the applied voltage. Parameter 2, Nominal discharge current (In) The nominal discharge current refers to the 8/20 peak current flowing through the surge protector (SPD). The nominal discharge current of Junhe electronic power surge protector varies according to the protection level. For details, please refer to the product list page. Parameter 3, impulse current (Iimp) Determined by the current peak value Ipeak, the charge quantity Q and the specific energy W/R, it is the classification of the surge protector of the 10/350 wave type I experiment. Parameter 4. Maximum discharge current(Imax) The maximum discharge current is flowing through the surge protector, which has a peak value of 8/20 wave type current. The maximum discharge current is different for different levels of the power surge protector. For details, please refer to the product list page. Parameter 5, the maximum continuous working voltage(Uc) The maximum continuous working voltage is the maximum effective value of AC voltage or DC voltage that is allowed to be permanently applied to the surge protector. Its value is equal to the rated voltage. Parameter 6, voltage protection level (Up) The voltage protection level is a performance parameter that characterizes the voltage between the terminals of the surge protector, and its value can be selected from a list of preferred values. Parameter 7, residual pressure Residual voltage refers to the peak voltage between the terminals of the surge protector when the discharge current flows through it. Parameter 8, shell protection level The shell protection level of a surge protector refers to the degree of protection provided by the shell to prevent dangerous parts from being touched, to prevent external solid foreign objects, and to prevent water from entering the shell. Learn more about techwin's products: Smart spd, Ethernet spd, lightning protection device, thunder surge protector. welcome to contact us for help.