What the 15 kA breaking capacity and C-curve mean for panel coordination
The 5SL7320-7RC: The 20 A rating and 3-pole construction suit it for three-phase branch circuits — lighting, small motor groups, or distribution sub-feeds in a 400 V industrial panel.
Panel fit and DIN-rail integration
The 3-pole body occupies three modular 18 mm widths (54 mm total) — account for this when laying out the enclosure fill factor alongside adjacent breakers, contactors, and terminal blocks. The busbar comb bridges across the line side for a common feed; the load side wires into the screw terminals with a cage clamp rated for solid or stranded copper up to 25 mm².