Siemens 5SN6306-8CP — SENTRON 3-Pole MCB, C-Curve
It is rated for 400 V AC supply voltage (multi-phase operation up to 440 V AC) and carries a 6 kA breaking capacity per EN 60898 alongside a 30 kA rating per IEC 60947-2 — the higher figure governs fault clearance in industrial panel applications where the prospective short-circuit current exceeds the residential standard.
The dual breaking-capacity rating is the key specification for panel coordination.
Voltage Ratings and DC Capability
Rated AC supply voltage is 400 V, with multi-phase and single-phase operation both accepted up to 440 V AC maximum. For DC circuits, the maximum rated voltage is 72 V — useful for control-voltage tap-offs or battery-backed buswork, though the DC breaking capacity is not separately stated here and should be verified against the prospective DC fault current.
Physical Fit and Installation
Dimensions are 90 mm height, 76 mm depth, and 54 mm width (3 modular units). Installation depth is 70 mm. The 54 mm width means it occupies three standard 18 mm DIN-rail module positions — a direct fit in any SENTRON or third-party distribution board that accepts modular devices. Solid conductors up to 35 mm² can be terminated, which covers most feeder and subfeed cable sizes in a panel.