50 A C-curve 3-pole MCB for distribution boards
Active production — no lifecycle risk for new builds
Listed as Active by Siemens. No phase-out or last-time-buy window is in effect. This part is a standard catalog item in the SENTRON family, so BOM planners can specify it for new panel designs without worrying about a near-term EOL notice.
C-curve and breaking capacity — what they mean for coordination
The C-curve trips between 5× and 10× rated current (In), so at 50 A the magnetic trip fires between 250 A and 500 A. This suits loads with moderate inrush — lighting banks, small motor circuits, and general socket outlets. The 10 kA breaking capacity per EN 60898 at 415 V AC is the standard for final circuits fed from a 10 kA-rated upstream device; verify selectivity with the upstream breaker if the prospective short-circuit current exceeds 10 kA. Power loss per pole is 4.5 W in hot operating state — three poles dissipate 13.5 W total, which matters for thermal rise in a densely populated enclosure.