Never worry about power surges. This unit from Square D surge protects all electronic equipment and household appliances in the home from lightning strikes and local power utilities. Compatible with any brand of electrical panel, it connects to a dedicated 2 pole 20A circuit breaker in the panel (sold separately). Compact, it requires minimal space and can be installed anywhere on the side or bottom of the panel. It features duel LED indicators for protection status; surge current rating per phase: 80,000 A; short circuit current rating: 25,000 A; and it meets current UL 1449 3rd edition standards. Modes of surge suppression: line to neutral, line to ground, line to line, neutral to ground.