Item Type: Surge Protection Device_x000D_Model: SGSP 40_x000D_Uc: 1000VDC_x000D_In: 20KA(8/20s)_x000D_Inmax: 40KA(8/20s)_x000D_Up: 3.8KV_x000D_Shell Material: Fireproof and high flame retardant PC_x000D_Installation: 35 standard guide rail_x000D_Protection Grade: IP20_x000D_Characteristic: _x000D_This series of surge protector is applicable to TT and IT of AC 50/60Hz, 1000V and below The IT-S, TN-CS and other power supply systems can be used as the equipotential connection at the interface between LPZ1, LPZ2 and LPZ3. The design basis is in accordance with IEC61643-1 and GB8802.1. The shell is designed to be installed on the 35mm electrical guide rail. The built in failure release device surge protector of the product can automatically disconnect it from the power grid when it is ineffective due to overcurrent overheating, At the same time, the visual warning indicator module changes from green (normal) to red (fault). The module with protector can be replaced when there is working voltage.