It carries a 10 kA breaking capacity per EN 60898 for residential/commercial branch circuits and a 20 kA rating per IEC 60947-2 for industrial panel duty, both at 400 V AC.
Panel integration
The 5SP4150-8 mounts on standard DIN rail and occupies a single modular width unit. Installation depth is 70 mm, which matches the SENTRON 5SP and 5SY series — it drops into existing distribution boards without clearance issues.
Selectivity and coordination
For a site electrical engineer planning selective coordination, the 20 kA breaking capacity per IEC 60947-2 gives headroom above the 10 kA EN 60898 rating — the higher figure applies when the MCB is used in an industrial context where prospective fault current may exceed 10 kA. The D-curve's 10–20× In magnetic trip band means upstream devices need a delayed characteristic (e.g., SENTRON 5SP series with B or C curves, or a larger-frame MCCB) to maintain selectivity on high-impedance faults. The 50 A rating pairs naturally with motor branch circuits up to about 15 kW at 400 V three-phase, depending on starting current profile.