The Siemens 5SL6550-6 is a 1P+N miniature circuit breaker from the SENTRON 5SL6 series, rated 50 A at 230 V AC with a B tripping characteristic. The B curve trips between 3 and 5 times rated current (150–250 A), making it the standard choice for resistive and general-purpose loads in residential and infrastructure installations — lighting circuits, socket outlets, and small distribution boards where inrush is moderate. Breaking capacity is 6 kA per both EN 60898 and IEC 60947-2, adequate for most domestic and light commercial service entrances where the prospective short-circuit current stays under that threshold.
Panel fit and wiring constraints
Two width units (36 mm) on the DIN rail, installation depth 70 mm, total depth 76 mm. Accepts solid or stranded copper from 0.75 mm² up to 25 mm².