Product Description: The Siemens LXD63B350 is a Molded Case Circuit Breaker from the Sentron Series family. It features a 3-pole design with a 600V, 350A rating and a 35kA@480V AIC rating. This breaker uses a Bolt-On connection and includes Thermal Magnetic protection. The LXD63B350 is part of the LD frame size and does not include lugs.