The Siemens 5SY4215-6 is a SENTRON miniature circuit breaker (MCB) in a 2-pole, B-characteristic configuration, rated at 1.6 A with a 10 kA breaking capacity per EN 60898 and a 35 kA rating per IEC 60947-2. This is a current-production part, actively available through distribution channels.
At higher panel temperatures, the breaker derates: 1.52 A at 40 °C, 1.48 A at 45 °C, 1.44 A at 50 °C, 1.4 A at 55 °C, and 1.36 A at 60 °C (–). At 10 kA per EN 60898, it handles typical commercial service-entrance faults. The 35 kA rating per IEC 60947-2 applies in industrial installations with higher available fault current — useful when this breaker sits downstream of a larger transformer or in a high-SCCR panel. The DC rating of 15 kA covers battery-backed or rectified DC circuits.
Combined top and bottom terminals allow busbar feed-through without extra wiring.