The Siemens 5SY6220-7 is a SENTRON miniature circuit breaker (MCB) with 2 poles, a C tripping characteristic, and a rated breaking capacity of 6 kA per IEC 60898-1 or 15 kA per IEC 60947-2. It is rated for 400 V AC (single- or multi-phase) and 60 V DC (72 V DC max).
The 5SY6220-7 occupies 2 modular width units (36 mm) on a DIN rail, with a depth of 76 mm (70 mm installation depth). Breaking capacity varies by standard: 6 kA under IEC 60898-1, 15 kA under IEC 60947-2, and 5 kA under UL 1077 / CSA C22.2 No. 235. For DC circuits, the rated breaking capacity is 15 kA at 60 V (72 V max). This gives flexibility for specifying the breaker across different regional codes and fault-current levels.
Mounts in any position via the quick assembly system (DIN rail). The combined terminal at top and bottom accepts supply from any side. Sealable cover is available for tamper-proofing. The 2-pole design with no neutral switching means it protects both phase conductors in a single-phase or two-phase circuit.