Surgelogic internally mounted surge protection devices delivers specification grade performance for service entrance or critical branch I-Line panel applications. These multiphase systems provide suppression, enchanced EFI/RFI filtering for all critical modes inside electrical equipment, and shorter lead lengths with superior SPD performance. They provide better performance with a diagnostic interface with push to test diagnostic switches, red and green status LEDs, module status LEDs per mode, dry contacts, audible alarm with disable switch, and a surge counter. These products have a 10 year product warranty and 10 modes of protection. This surge protection device is 3 phase, 4-wire + ground, 480Y/277 V, 50 kA breaking capacity, 120 kA surge current, and short circuit current rating of 200 kA. The device is engineered to UL 489 11th Edition, type 2 SPD and complies with UL 96A 12th Edition Master Label for Lightning Protection Systems.