Siemens 5SY7615-8 — SENTRON MCB, 4-pole D-curve 1.6 A
The Siemens 5SY7615-8 is a SENTRON miniature circuit breaker in the 5SY7 design, built for 4-pole (3P+N) protection on 400 V AC systems. That 50 kA figure means it handles high prospective fault currents common in industrial panel mains — not just residential service. The 15 kA EN 60898 rating covers the same part under the household-standard test sequence, so it dual-certifies for both industrial and commercial distribution boards. IP20 with conductors connected, so it's a panel-interior device; keep it behind the enclosure door.
Integration — panel fit and coordination
Width 72 mm (4 TE) matches the SENTRON modular grid. Neutral conductor switching is built in (3P+N), so the neutral pole opens and closes with the phases — no separate neutral link needed. Touch protection on the terminals is standard, and the device is sealable for metering or lockout-tagout compliance. That -40 °C floor covers cold storage or outdoor enclosures in northern climates without a heater.
Approvals and standards
Rated per EN 60898 (15 kA) and IEC 60947-2 (50 kA AC, 15 kA DC at 72 V). Also carries a UL 1077 / CSA C22.2 No. 235 rating at 5 kA AC — supplementary protector status for North American panels.