{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL6440-7BB","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL6440-7BB","canonicalUrl":"https://aoctrl.com/siemens/5SL6440-7BB","factsUrl":"https://aoctrl.com/api/mcp/products/5SL6440-7BB","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL6440-7BB, miniature circuit breaker, 4-pole, tripping characteristic C, 40 A, 400 V AC, 6 kA breaking capacity, 4 MW.","salesMarkdown":"## What it is and what it does The Siemens SENTRON 5SL6440-7BB is a 4-pole miniature circuit breaker (MCB) with a C tripping characteristic, rated 40 A at 400 V AC. It provides overcurrent and short-circuit protection for final circuits in residential and infrastructure builds, with a breaking capacity of 6 kA per both EN 60898 and IEC 60947-2. The C-curve means it trips between 5 and 10 times rated current — suited for circuits with moderate inrush, like lighting banks, small motor loads, or general socket outlets. The 4-pole design switches all three phases plus neutral, common for three-phase distribution boards in European-style panels. ## Panel fit and integration Occupies 4 modular width units (72 mm wide) on a DIN rail, with a depth of 76 mm and height of 90 mm. Mounts in any position — no derating needed for orientation. Installation depth is 70 mm behind the panel surface, so it clears shallow enclosures. IP20 with connected conductors; suitable for clean, dry indoor environments. Sealable design allows locking in the OFF position for lockout/tagout. Accepts supplementary devices (auxiliary switches, shunt trips, undervoltage releases) for remote status or emergency-off integration. ## Environmental and compliance Halogen-free and silicon-free construction, rated for ambient temperatures from -40 °C to 75 °C. Overvoltage category III, pollution degree 2 — standard for fixed-installation distribution boards. Power loss is 3 W per pole at rated current in hot operating state.","metaTitle":"Siemens 5SL6440-7BB SENTRON MCB, 4P C 40A 6kA","metaDescription":"Siemens SENTRON 5SL6440-7BB miniature circuit breaker, 4-pole, C-curve, 40 A, 400 V AC, 6 kA breaking capacity per EN 60898/IEC 60947-2. Active production, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["4-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"72 mm","title":"5SL6440-7BB","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V 6kA, 4-pole C, 40 A Version Italy","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"4P","Number Of Poles":"4","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","Energy Limitation Class":"3","Suitability For Operation":"Residential buildings/infrastructure","at DC rated value maximum":"72 V","Number Of Modular Width Units":"4","Tripping Characteristic Class":"C","supply voltage at AC rated value":"400 V","according to EN 60898 rated value":"6 kA","according to IEC 60947-2 rated value":"6 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","Mechanical Service Life (Operating 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":"3 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/0d39958bdb01b3b38e97409b940d9225.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=156662&mlfb=5SL6440-7BB"},"ai":{"faq":[{"question":"Where can I buy 5SL6440-7BB?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the breaking capacity of 5SL6440-7BB?","answer":"Rated 6 kA per both EN 60898 and IEC 60947-2 at 400 V AC."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL6440-7BB","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/5SL6440-7BB 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}}