The 5SL7150-7RC: The C characteristic means the magnetic trip operates at 5 to 10 times rated current — suited for motor and lighting loads with moderate inrush, not for pure resistive or high-inrush transformer circuits. The 15 kA breaking capacity at 240/415 V tells you it can safely interrupt a fault current up to that level without welding the contacts or cascading failure to upstream gear. A 50 A frame on a single pole covers branch circuits feeding large single-phase loads or sub-distribution boards.
Panel Integration
Snap-on DIN rail mounting for 35 mm rail per EN 60715. The 1-pole width (roughly 18 mm per module) means it occupies a single slot in the distribution board — plan your fill factor accordingly.