The Siemens 5SY7215-8CC is a 2-pole miniature circuit breaker from the SENTRON 5SY7 series, rated 1.6 A with a D tripping characteristic. It snaps onto a standard 36 mm wide DIN-rail footprint (2 MW, 36 mm wide, 90 mm tall, 76 mm deep) and is rated for 400 V AC, with a maximum DC voltage of 72 V.
Breaking capacity — the number that decides coordination
Rated 50 kA at 400 V AC per IEC 60947-2, which means this breaker can safely interrupt a fault current up to 50,000 A without welding contacts or rupturing the case. That's the figure you need for panel SCCR calculations — it determines whether the breaker clears a bolted fault before upstream devices have to act. Under UL 1077 and CSA C22.2 No. 235 the rating drops to 5 kA, so if the panel carries a UL label, the available fault current must stay under that limit.
Tightening torque is 2.5–3.5 N·m, typical for a screw-type terminal on this frame size. The breaker is sealable and touch-protected (IP20 with conductors connected).