Features 1、Visual Window: Come with visual window, red and green lights indicate power on and off at a glance 2、Anti Crack Buckle: Anti crack buckle is designed to prevent buckle from cracking, bring easy and convenient wiring 3、PC Flame Retardant Material: The shell of the voltage arrester is made of PC flame retardant material, fire prevention, safer to use 4、Removable Components: Come with stable performance and easy installation. Detachable assembly, easy to plug and unplug 5、Excellent Performance: SPS surge protective devices come with stable structure, excellent performance and long service life Specification Item Type: SPD Surge Protective Devices Product Material: PC Product Model: RMU1-C40 Maximum Voltage: AC 420V Nominal Discharge Current: 10kA; 20kA; 30kA Voltage Protection Level: 1.8kV Level: 2P Installation Method: Rail installation Package List 2 x SPD Surge Protective Devices