The electronic part 5SY4350-8 manufactured by Siemens is a circuit breaker, approved according to IEC/EN 60947-2. This device has 230/400V AC voltage, inom (service current) of 50A, 3 poles, DIN mount and Characteristic D. It provides high breaking capacity of 65 kA at 400V AC. The product has a compact, UL approved housing with integrated auxiliary and alarm contacts. It is UL 1077 supplement SB approved and can be used in equipment with 660V AC insulation. The circuit breaker offers selective coordination, increased control precision and troubleshooting facility. Other features include high-speed short-circuit tripping, mechanical and electrical endurance, and shock & vibration protection.