{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL1150-7MB","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL1150-7MB","canonicalUrl":"https://aoctrl.com/siemens/5SL1150-7MB","factsUrl":"https://aoctrl.com/api/mcp/products/5SL1150-7MB","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL1150-7MB, miniature circuit breaker, 1-pole, C-curve, 50 A, 3 kA per IEC 60947-2, 230/400 V AC, 18 mm width.","salesMarkdown":"## What it is and what it does The Siemens 5SL1150-7MB is a SENTRON miniature circuit breaker — a 1-pole, C-curve unit rated 50 A with a 3 kA breaking capacity per IEC 60947-2. It occupies a single 18 mm modular width on the DIN rail, making it a direct fit for residential and infrastructure distribution boards where branch-circuit overcurrent protection is needed for resistive or moderate motor-start loads. The C-curve trips between 5× and 10× rated current, so it handles inrush from small transformers or lighting ballasts without nuisance tripping. ## Key ratings and what they mean for fit The 3 kA breaking capacity (IEC 60947-2) is the fault current this breaker can safely interrupt — suitable for residential and light commercial panels where the prospective short-circuit current stays under that threshold. At 50 A, it protects a 50 A feeder or a high-load branch; the single-pole design switches the line conductor only, so it is used in single-phase 230 V AC circuits (rated 253 V single-phase) or across two phases at up to 440 V AC (multi-phase operation). The 4.3 W power loss per pole at rated current matters for thermal budgeting inside a crowded enclosure. ## Installation and environment Mounts in any position on a DIN rail with 70 mm installation depth behind the panel. The IP20 rating (with connected conductors) means it is intended for dry indoor enclosures — standard for distribution boards. Ambient range spans -40 °C to 75 °C, covering unheated utility rooms and outdoor-adjacent cabinets. Halogen-free and silicon-free construction suits environments where outgassing must be minimized (e.g., clean rooms or sensitive electronics nearby).","metaTitle":"Siemens 5SL1150-7MB SENTRON MCB, 1P C 50A 3kA","metaDescription":"Siemens SENTRON 5SL1150-7MB miniature circuit breaker, 1-pole, C-curve, 50 A, 3 kA breaking capacity per IEC 60947-2. Active production, sourced to order. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"18 mm","title":"5SL1150-7MB","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Circuit breaker 230/400V 3kA, 1pole, C, 50A","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"1P","Number Of Poles":"1","lifecycle_stage":"current","Mounting Position":"any","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","Suitability For Operation":"Residential buildings/infrastructure","at DC rated value maximum":"72 V","Number Of Modular Width Units":"1","Tripping Characteristic Class":"C","supply voltage at AC rated value":"230 V","according to IEC 60947-2 rated value":"3 kA","Type Of Voltage Of The Operating Voltage":"AC","with multi-phase operation at AC maximum":"440 V","Value Range Of The Supply Voltage Frequency":"50/60 Hz","with multi-phase operation at AC rated value":"440 V","with single-phase operation at AC rated value":"253 V","vibration resistance according to IEC 60068-2-6":"no","Mechanical Service Life (Operating Cycles) Typical":"4 000","power loss [W] for rated value of the current at AC in hot operating state per pole":"4.3 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/2d396558b77f00194f5ac81df00cacee.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1046711&mlfb=5SL1150-7MB"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SL1150-7MB?","answer":"3 kA per IEC 60947-2. This is the maximum prospective fault current the breaker can safely interrupt at its rated voltage."},{"question":"Will 5SL1150-7MB drop into a panel designed for 5SL4363-7?","answer":"No — the 5SL4363-7 is a 3-pole unit (54 mm wide), while the 5SL1150-7MB is a single-pole (18 mm wide). The footprint and wiring differ; you cannot swap them without rewiring the panel."},{"question":"Where can I buy 5SL1150-7MB?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL1150-7MB","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/5SL1150-7MB when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}