The Siemens 5SL4463-6CC is a 4-pole miniature circuit breaker rated for 400 V AC with a 10 kA breaking capacity, B-curve trip characteristic, and 63 A rated current. It belongs to the Basic Devices product family and carries group code P310, product group 3822.
What the ratings mean for fit
The 10 kA breaking capacity at 400 V means this MCB can safely interrupt fault currents up to 10,000 A without welding its contacts or cascading failure upstream — critical for panel coordination in industrial distribution boards where prospective short-circuit current is known. The B-curve (3-5× In magnetic trip) is standard for resistive and general-purpose loads; it avoids nuisance tripping on moderate inrush while still clearing fast on hard faults. The 4-pole configuration (3 phases + neutral switched) is typical for three-phase final subcircuits in IEC markets.
Deployment context
Snap-on DIN rail mounting for standard 35 mm rail in panel enclosures. The B-curve and 63 A rating suit resistive loads, lighting banks, or general-purpose final circuits in commercial and light industrial distribution boards. Four-pole switching covers three-phase plus neutral disconnection.