BW400SAGU-3P300SB is a three-pole molded case circuit breaker from Fuji Electric's G-TWIN series, designed for line protection in industrial and commercial applications. This breaker features a 400 A ampere frame with a 300 A rated current and is UL489 listed, meeting North American safety standards. The unit is equipped with block terminal connections for both line and load sides (SB configuration), providing secure and reliable electrical connections. Available mounting options include Blank, SB, S7, and S8 configurations to accommodate various installation requirements. The SAGU series design ensures robust overcurrent protection and is suitable for three-phase power distribution systems requiring dependable circuit protection.