{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL4340-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL4340-7","canonicalUrl":"https://aoctrl.com/siemens/5SL4340-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SL4340-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL4340-7 miniature circuit breaker, 3-pole, C-curve, 40 A, 400 V AC, 10 kA breaking capacity per EN 60898 / IEC 60947-2.","salesMarkdown":"The Siemens 5SL4340-7 is a SENTRON miniature circuit breaker — 3-pole, C-curve, rated 40 A at 400 V AC, with a 10 kA breaking capacity certified to both EN 60898 and IEC 60947-2. The 3-pole design handles three-phase loads up to 440 V AC (multi-phase operation), and it also carries a DC rating of 72 V maximum — useful if the same panel feeds a DC bus or control supply, though the DC breaking capacity is not the same as the AC 10 kA figure. ## Panel integration and physical fit The 5SL4340-7 occupies 3 modular width units (each 18 mm, so 54 mm total) on a DIN rail. The 90 mm height is standard for SENTRON MCBs, so it aligns with adjacent devices in a multi-row enclosure. It is sealable (a lead seal can be fitted through the toggle slot to prevent unauthorized switching), halogen-free and silicon-free — important for environments where outgassing from a fault could damage sensitive electronics or contaminate clean-room processes. The closest peer in the same family is the 5SL4363-7 — identical form factor (same 54 mm width, 76 mm depth, 90 mm height), same 3-pole C-curve, same 10 kA breaking capacity, same 400 V AC rating. The difference is the current rating: the 5SL4363-7 is a 63 A device. If your BOM specifies 40 A, the 5SL4340-7 is the correct part; the 63 A version will not drop in without checking the downstream conductor sizing and load protection coordination. The halogen-free and silicon-free construction supports RoHS and REACH compliance. The manufacturer provides a declaration of conformity and test reports; these are typically available on the Siemens Industry Online Support portal.","metaTitle":"Siemens 5SL4340-7 SENTRON MCB, 3P C 40A 10kA","metaDescription":"Siemens 5SL4340-7 SENTRON miniature circuit breaker, 3-pole, C-curve, 40 A, 10 kA breaking capacity per EN 60898. Active production, available to order. Request RFQ for current pri","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":"5SL4340-7","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V 10kA, 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":"10 kA","according to IEC 60947-2 rated value":"10 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":"3.3 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/14bff235354d92c9f23a8ad09209f9ba.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=103598&mlfb=5SL4340-7"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SL4340-7?","answer":"10 kA per both EN 60898 and IEC 60947-2 at 400 V AC."},{"question":"Will 5SL4340-7 fit in a panel designed for 5SL4363-7?","answer":"Yes, the two share the same 54 mm width, 76 mm depth, and 90 mm height, so the physical fit is identical. The difference is the current rating — 40 A vs 63 A — so verify the load and conductor sizing before substituting."},{"question":"Where can I buy 5SL4340-7 and get current pricing?","answer":"The 5SL4340-7 is sourced to order against an RFQ through independent distribution. Submit an RFQ for current pricing and availability; lead time is confirmed at quote time."},{"question":"What compliance documentation is available for 5SL4340-7?","answer":"The manufacturer provides a declaration of conformity for CE, EN 60898, and IEC 60947-2. The part is halogen-free and silicon-free, supporting RoHS and REACH compliance."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL4340-7","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/5SL4340-7 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}}