The Siemens SENTRON 5SY5416-6CC is a 4-pole DC miniature circuit breaker rated 880 V with a 10 kA breaking capacity per IEC 60947-2. Polarity matters on this design; the evidence flags it explicitly, so the line and load sides must be wired consistently.
That's the SCCR your DC bus needs to withstand. The AC rating of 5 kA per UL 1077 and CSA C22.2 No.235 covers installations where the same part sees AC supply, though the primary duty here is DC. Conductor termination accepts 0.75 to 35 mm² solid or stranded, with a tightening torque of 2.5 to 3.5 N·m (22 to 31 lbf·in). Mounting uses the quick assembly system — snaps onto a DIN rail without tools. Storage range extends to -40 to +75 °C.
The breaker carries IEC 60947-2 and UL 1077 / CSA C22.2 No.235 certifications.