The ASISP275A-3PN is a DIN rail mountable surge protection device, 4 Pole, 3 Phase Wye 415/240 Vac, MOV (L-N) and GDT (N-G). This UL1449 4th edition spd has a max continuous operating voltage of 275 Vac, has less than or equal to 25 ns response time for (MOV) and less than or equal to 100 ns response time for GDT. The ASI 240V 4 wire 3 phase SPD device has a factory tested SCCR rating of 200kA.