SURGE ARRESTER TYPE 2 REQUIREMENT CAT. C,UC 440V AC PROTECTION BLOCKS PLUGGABLE 4POLES, 4+0 CIRCUIT FOR IT SYSTEMS WITH N CONDUCTOR COMMUNICATION CONTACT
BASE ELEMENT 2 WIRE ROUGH PROT. FOR DIN RAIL MOUNTING FOR ROUGH PROTECTION OF 2 SIGNAL WIRES MOUNTING FOOT DIRECT EARTHED FOR PLUGGING MODULE 5SD7502-0
BASE ELEMENT 2X2, DIN RAIL 2 CHANNELS, 4 WIRES MOUNTING FOOT INDIRECT EARTHED VIA A GAS_FILLED SURGE ARRESTER FOR PLUGGING MODULE 5SD7522-. AND 5SD7550-4