{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL6550-7BB","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL6550-7BB","canonicalUrl":"https://aoctrl.com/siemens/5SL6550-7BB","factsUrl":"https://aoctrl.com/api/mcp/products/5SL6550-7BB","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL6 series, miniature circuit breaker, 2-pole 1P+N, C-curve, 50 A rated, 6 kA breaking capacity, 230 V AC, IP20.","salesMarkdown":"The Siemens 5SL6550-7BB is a SENTRON 5SL6 miniature circuit breaker — 2-pole 1P+N configuration, C-curve trip characteristic, rated 50 A at 230 V AC with a 6 kA breaking capacity certified to both EN 60898 and IEC 60947-2. At 50 A this is a high-current single-pole-plus-neutral breaker for the Italian market variant (the -7BB suffix). The neutral pole is switched — the breaker opens both line and neutral when it trips, which matters for installations that require full isolation on a single module width. If your panel's SCCR is higher, you'd step up to the 5SY series or a higher-rated SENTRON variant. ## Thermal derating — the number that actually governs the load At 40 °C it derates to 46.19 A, at 45 °C to 44 A, and at 55 °C to 39.81 A. That's a 20 % drop from the nameplate at the top of the operating range. The C-curve's magnetic trip threshold (5–10× In) means a 50 A unit holds through 250–500 A inrush before instant tripping — fine for lighting banks, distribution subfeeds, and small transformer primaries. For a motor circuit with locked-rotor inrush above 500 A, you'd want a D-curve or a motor-protective breaker instead. ## Panel fit and installation notes Depth behind the panel face is 70 mm installation depth; overall depth including the front profile is 76 mm. Terminals accept solid and stranded copper up to 25 mm² (the 5SL6563-7BB peer confirms the range). Halogen-free and silicon-free construction — no outgassing concerns in clean environments or sealed enclosures. Sealable per the spec, which matters for utility-metering applications where tamper evidence is required. Ambient storage range -40 to +75 °C covers warehouse and transport extremes.","metaTitle":"Siemens 5SL6550-7BB SENTRON MCB, 2-pole C 50 A 6 kA","metaDescription":"Siemens 5SL6550-7BB SENTRON miniature circuit breaker, 2-pole 1P+N, C-curve, 50 A rated, 6 kA breaking capacity per EN 60898/IEC 60947-2. Current production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"36 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"2","lifecycle_stage":"current","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"2","Product Designation":"Miniature circuit breaker","acc. to IEC 81346-2":"F","at AC / rated value":"50 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","acc. to DIN EN 61346-2":"F","Energy Limitation Class":"3","at 30 °C / rated value":"50 A","at 40 °C / rated value":"46.19 A","at 45 °C / rated value":"44 A","at 55 °C / rated value":"39.81 A","Suitability For Operation":"Residential buildings/infrastructure","Number Of Modular Width Units":"2","Tripping Characteristic Class":"C","at DC / rated value / maximum":"72 V","acc. to EN 60898 / rated value":"6 kA","acc. to IEC 60947-2 / rated value":"6 kA","Product Feature / Touch Protection":"Yes","supply voltage / at AC / rated value":"230 V","Influence Of The Surrounding Temperature":"Periodically +55°C, max. 95% humidity","Product Function / Neutral Conductor Switching":"Yes","with single-phase operation / at AC / rated value":"250 V","Mechanical Service Life (Switching Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/bc1fa966fffe0222196ce1f430cc19ae.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=444130&mlfb=5SL6550-7BB","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SL6550-7BB/alternatives.json"},"ai":{"faq":[{"question":"When sourcing 5SL6550-7BB, what's the closest functional second-source — 5SL6563-7BB?","answer":"The 5SL6563-7BB is the closest functional sibling — same 2-pole 1P+N C-curve, same 6 kA breaking capacity, same 76×36 mm DIN footprint, but rated 63 A instead of 50 A. It drops into the same panel without rewiring."},{"question":"What is 5SL6550-7BB's listed depth (76 mm) on this component line?","answer":"The overall depth is 76 mm; the installation depth behind the panel face is 70 mm. Width is 36 mm (2 modular units), height is 90 mm."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL6550-7BB","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/5SL6550-7BB when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}