{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL4550-6","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL4550-6","canonicalUrl":"https://aoctrl.com/siemens/5SL4550-6","factsUrl":"https://aoctrl.com/api/mcp/products/5SL4550-6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL4550-6 miniature circuit breaker, 1P+N, B characteristic, 50 A, 10 kA breaking capacity, 230 V AC, 2 MW units.","salesMarkdown":"## Spec recap for the panel builder The Siemens 5SL4550-6 is a SENTRON miniature circuit breaker (MCB) with a 1P+N pole design — it switches the line and protects the neutral, but does not break the neutral on overcurrent. Rated 50 A at 30 °C with a B tripping characteristic, it clears faults up to 10 kA per EN 60898 and IEC 60947-2. That 10 kA SCCR at 230 V AC means it safely interrupts a short-circuit up to that level without upstream damage — standard for residential and light commercial distribution boards. ## Thermal derating and real-world current The 50 A rating holds at 30 °C ambient. At 40 °C it derates to 46.19 A, at 45 °C to 44 A, and at 55 °C to 39.81 A. If your enclosure runs warm — typical for a crowded consumer unit — size the upstream protection for the derated figure, not the label. The 4 W power loss per pole at rated current adds up in a multi-way board; keep ventilation slots clear. ## Mounting and integration Snap-on DIN rail mount, 2 modular width units (36 mm wide). Depth is 76 mm, with an installation depth of 70 mm behind the panel face. ## Environmental and compliance notes Halogen-free and silicon-free construction — important for installations where outgassing during a fault could damage nearby electronics or where silicone contamination affects contactors and relays. Operating temperature range is -40 °C to 75 °C, covering outdoor enclosures in cold climates. Pollution degree 2 and overvoltage category III, which is the standard for fixed-installation distribution boards.","metaTitle":"Siemens 5SL4550-6 SENTRON MCB, 1P+N, B Curve, 50 A, 10 kA","metaDescription":"Siemens 5SL4550-6 SENTRON miniature circuit breaker, 1P+N, B characteristic, 50 A rated, 10 kA breaking capacity per EN 60898. Active production, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","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","Design Of Pole":"1P+N","Number Of Poles":"2","lifecycle_stage":"current","Mounting Position":"any","at AC rated value":"50 A","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"2","Product Designation":"Miniature circuit breaker","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","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","Energy Limitation Class":"3","according to EN 61346-2":"F","according to IEC 81346-2":"F","Suitability For Operation":"Residential buildings/infrastructure","at DC rated value maximum":"72 V","Number Of Modular Width Units":"2","Tripping Characteristic Class":"B","supply voltage at AC rated value":"230 V","according to EN 60898 rated value":"10 kA","according to IEC 60947-2 rated value":"10 kA","Type Of Voltage Of The Operating Voltage":"AC","Value Range Of The Supply Voltage Frequency":"50/60 Hz","with single-phase operation at AC rated value":"250 V","Mechanical Service Life (Switching Cycles) Typical":"10 000","Product Extension Installable Supplementary Devices":"Yes","power loss [W] for rated value of the current at AC in hot operating state per pole":"4 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/33e571ac4223ddce0bdc88ccae49eeb4.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=450450&mlfb=5SL4550-6","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SL4550-6/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL4550-6","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/5SL4550-6 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}}