At Breaker Outlet, we pride ourselves on being one of the largest sources for electrical components, including 400 amp panel boards, circuit breakers, motor controls, busway plugs, and more. If you need a 400 amp breaker box from Square D, General Electric (GE), and other top brands, we offer the best prices for both new and older systems. If you don’t see the specific electrical component you need, we may have it even if it isn’t listed on the website—call us to find out if we have it. There’s no better way to get the electrical parts for any job than going through Breaker Outlet! Browse the full collection of 400 amp panel boards below.