The BW50EAG-3P040 is a 3-pole molded case circuit breaker from Fuji Electric's G-TWIN Standard Series designed for line protection in industrial AC power distribution systems. It features a 50A ampere frame with a rated breaking capacity of 2.5 kA at 415V AC (per IEC 60947-2 and JIS C 8201-2-1 standards), and supports rated insulation voltage of 690V AC and 250V DC. The breaker accommodates rated currents of 5, 10, 15, 20, 30, 40, and 50A at a reference ambient temperature of 40°C, with a thermal-magnetic tripping device rated at 0.5. It is available with multiple mounting options including front mounting with front or rear connection, flush mounting, plug-in mounting, and IEC 35mm wide rail mounting, and supports internal accessories such as alarm switches, auxiliary switches, undervoltage trips, and shunt trips. This circuit breaker is commonly used in industrial control panels, motor protection circuits, and general line protection applications where reliable overcurrent and short-circuit protection is required.