The Siemens 5SL6608-7 is a SENTRON 5SL6 miniature circuit breaker (MCB) — 4-pole, 3P+N configuration, rated 8 A at 400 V AC with a C tripping characteristic. It breaks fault currents up to 6 kA per EN 60898 and IEC 60947-2, which means it coordinates with standard residential and light commercial distribution boards without requiring an upstream fuse for fault levels up to that threshold. The 72 mm width (4 width units) fits standard DIN-rail enclosures; the 76 mm depth and 70 mm installation depth leave clearance for cover-mounted accessories.
Breaking capacity of 6 kA per both EN 60898 and IEC 60947-2 tells you the breaker can safely interrupt a short-circuit fault up to 6 kA at the rated voltage; if your available fault current exceeds that, you need an upstream current-limiting device or a higher-rated breaker. Overvoltage category 3 means it's rated for fixed-installation distribution panels, not for downstream equipment-level protection. Energy limiting class 3 indicates it limits let-through energy effectively, reducing stress on downstream wiring during a fault.
Installation and environment
Ambient temperature range -25 to +45 °C covers most indoor panel environments; storage range -40 to +75 °C covers shipping and warehousing. Terminals accept solid or stranded conductors from 0.75 to 25 mm² — sufficient for 8 A circuits using 1.5 mm² or 2.5 mm² wiring, and the upper range covers parallel feeds or larger tails. Tightening torque 2.5 to 3 N·m; use a torque screwdriver to avoid terminal damage or loose connections.