Siemens 5SY6240-7 SENTRON 5SY6 Miniature Circuit Breaker 2P C-curve 40 A 6 kA. Siemens 5SY6240-7 miniature circuit breaker from the SENTRON 5SY6 range. Official Siemens listing: Miniature circuit breaker 400 V 6kA, 2-pole, C, 40A, D=70 mm. Key details: Voltage rating: 400 V, Breaking capacity: 6 kA, Poles: 2P, Trip curve: C, Rated current: 40 A, Installation depth: 70 mm. Suitable for low-voltage distribution boards, industrial control panels, maintenance replacement, and OEM panel-building projects.