{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL3340-7MB","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL3340-7MB","canonicalUrl":"https://aoctrl.com/siemens/5SL3340-7MB","factsUrl":"https://aoctrl.com/api/mcp/products/5SL3340-7MB","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL3340-7MB miniature circuit breaker, 3-pole, 40 A, C-curve, 4.5 kA breaking capacity per EN 60898, 400 V AC, 3 MW units.","salesMarkdown":"The 4.5 kA breaking capacity at 400 V AC (per EN 60898) tells you this MCB can safely interrupt a fault current up to 4.5 kA without welding its contacts or failing open; that is sufficient for most residential and light commercial sub-distribution boards, but if your fault current at the panel exceeds 4.5 kA you need the higher-rated 5SL4363-7 sibling (10 kA). Single-phase operation is rated at 250 V AC. The DC rating tops out at 72 V — so this is primarily an AC device; do not spec it for a 110 V DC string unless you stay under that ceiling. The 3 MW width (54 mm) means it occupies three adjacent 18 mm slots — check your rail fill before committing. That is adequate for a distribution breaker that cycles infrequently; if your design calls for frequent switching (e.g., a load-shedding contactor), this is not the part for that duty.","metaTitle":"Siemens 5SL3340-7MB SENTRON MCB, 3P C 40A 4.5kA","metaDescription":"Siemens SENTRON 5SL3340-7MB miniature circuit breaker, 3-pole, 40 A, C-curve, 4.5 kA breaking capacity per EN 60898. Active production, available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["3-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"54 mm","title":"5SL3340-7MB","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V 4.5 kA, 3-pole, C, 40 A","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"3P","Number Of Poles":"3","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":"3","Tripping Characteristic Class":"C","supply voltage at AC rated value":"400 V","according to EN 60898 rated value":"4.5 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":"250 V","vibration resistance according to IEC 60068-2-6":"no","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":"3.3 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/3ecf99778167a6ca59dcf8e89b3ab516.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=160346&mlfb=5SL3340-7MB"},"ai":{"faq":[{"question":"What is the breaking capacity of the 5SL3340-7MB?","answer":"The 5SL3340-7MB has a breaking capacity of 4.5 kA at 400 V AC per EN 60898. This is sufficient for most residential and light commercial sub-distribution boards, but if your available fault current exceeds 4.5 kA, consider the 5SL4363-7 which offers 10 kA."},{"question":"Will the 5SL3340-7MB fit in a panel designed for the 5SL4363-7?","answer":"Yes, both the 5SL3340-7MB and the 5SL4363-7 share the same physical footprint: 3 MW width (54 mm), 76 mm depth, 70 mm installation depth, and 90 mm height. They mount on the same DIN rail and accept the same supplementary devices. The only difference is the breaking capacity — 4.5 kA vs 10 kA — so the swap is mechanical but not electrical if your fault current requires the higher rating."},{"question":"Where can I buy the 5SL3340-7MB?","answer":"The 5SL3340-7MB is sourced and quoted to order through independent distribution. Availability and current pricing are confirmed at quote time against an RFQ."},{"question":"What is the operating temperature range for the 5SL3340-7MB?","answer":"The 5SL3340-7MB operates from -40 °C to +75 °C, covering extreme cold storage and hot panel environments."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL3340-7MB","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/5SL3340-7MB 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}}