200A 2-Pole Main Circuit Breaker with Hydraulic Magnetic Trip Technology. 120/240V, 22kA Interrupt Rating HYDRAULIC MAGNETIC – Precision trip technology ensures that the main breaker operates as intended from -40°C to 85°C (-40°F to 185°F) without re-rating *For applications up to 60A when using copper wire; or 50A when using aluminum wire *Designed for Leviton Load Centers only