Part identity and key ratings
The Siemens 5SL6250-7 is a SENTRON miniature circuit breaker rated 50 A, 2-pole, with a C tripping characteristic and a 6 kA breaking capacity at 400 V AC per both EN 60898 and IEC 60947-2. The C-curve means it tolerates moderate inrush — typical for motor-starter or lighting panels — without nuisance tripping, while still clearing short circuits within the 6 kA fault level. At 50 A per pole on a 2-pole breaker, the 3.8 W power loss per pole in hot operating state matters for thermal coordination inside a crowded enclosure — derate adjacent devices accordingly.
Fit and panel integration
Two modular-width units (36 mm wide) snap onto standard DIN rail; depth is 76 mm, installation depth 70 mm. Mount in any position — no derating for orientation. IP20 with connected conductors — fine for enclosed distribution boards; not for wet or washdown zones without a secondary enclosure. Sealable, halogen-free, silicon-free construction suits infrastructure and residential building applications where outgassing or contamination matters.
Sourcing and lifecycle
The 5SL6250-7 accepts plug-in supplementary devices (auxiliary contacts, shunt trips, alarm switches) — same accessory family as the rest of the 5SL line, so stocking spare trip blocks or signal modules is straightforward.
Comparison to 5SL4363-7
The 5SL4363-7 is a 3-pole, 63 A, 10 kA variant in the same SENTRON 5SL family. It is 54 mm wide (3 MW units) vs 36 mm (2 MW) for the 5SL6250-7, so it will not drop into a panel wired for 2-pole spacing without a DIN-rail adapter or re-termination. Breaking capacity difference: 10 kA vs 6 kA. If the fault current at the panel exceeds 6 kA, the 5SL4363-7 is the correct call — otherwise the 5SL6250-7 saves one MW unit per circuit.