What the ratings mean for fit
The Siemens 5SL6208-7 is a 2-pole SENTRON miniature circuit breaker rated 8 A at 400 V AC with a C-curve tripping characteristic — meaning it handles moderate inrush from motor drives and transformers without nuisance trips, while still protecting branch wiring. Its 6 kA breaking capacity (under both EN 60898 and IEC 60947-2) matches typical domestic and light commercial distribution panels; if your fault-current study shows higher available current, you need a higher-rated device upstream. The 36 mm width (2 modular units) fits standard DIN-rail enclosures, and the IP20 rating with connected conductors means it's intended for enclosed panels, not open washdown areas.
Deployment context
Mounts on standard 35 mm DIN rail in any position (horizontal, vertical, flat). The 70 mm installation depth and 76 mm overall depth leave room for wiring in shallow enclosures. The sealable design (padlockable toggle) lets maintenance lock it off for safe work downstream — useful when the breaker feeds a dedicated machine circuit.
Environmental and compliance notes
Rated for ambient temperatures from -40 °C to +75 °C, with derated currents at elevated temperatures (7.61 A at 40 °C, 6.99 A at 55 °C). Halogen-free and silicon-free construction suits installations where outgassing or contamination is a concern (clean rooms, medical, food processing). Overvoltage category III and pollution degree 2 cover fixed-installation mains distribution. The part carries touch-protection on the terminals.