Siemens 5SY6520-6 SENTRON 5SY6 Miniature Circuit Breaker 1P+N B-curve 20 A 6 kA. Siemens 5SY6520-6 miniature circuit breaker from the SENTRON 5SY6 range. Official Siemens active listing: Miniature circuit breaker 230 V 6kA, 1+N-pole B, 20 A, D=70 mm. Key details: Voltage rating: 230 V, Breaking capacity: 6 kA, Poles: 1P+N, Trip curve: B, Rated current: 20 A, Installation depth: 70 mm. Selected for Egypt and Gulf MCB demand, including distribution boards, light-commercial panels, industrial control panels, maintenance replacement, and OEM panel-building projects.