{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL3240-7MB","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL3240-7MB","canonicalUrl":"https://aoctrl.com/siemens/5SL3240-7MB","factsUrl":"https://aoctrl.com/api/mcp/products/5SL3240-7MB","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL3240-7MB miniature circuit breaker, 2-pole, C-curve, 40 A, 4.5 kA breaking capacity at 400 V AC, 2 modular width units.","salesMarkdown":"The Siemens SENTRON 5SL3240-7MB is a 2-pole miniature circuit breaker rated 40 A at 400 V AC with a C tripping characteristic and a 4.5 kA breaking capacity per EN 60898. The 2-pole design switches both phase and neutral (or two phases) in a single 36 mm wide unit, occupying 2 modular width units on the DIN rail. The 76 mm depth and 70 mm installation depth fit standard distribution boards; the 36 mm width (2 modular units) means it occupies two adjacent 18 mm slots. IP20 with connected conductors is typical for enclosed panel use — no special sealing needed. Rated for ambient temperatures from -40 °C to 75 °C, with the 40 A rating valid at 30 °C and 40 °C (derate above that per the thermal curve). The 10 000 mechanical switching cycles cover typical service life for a panel MCB. The part carries the EN 60898 rating (4.5 kA) and is designed for residential and infrastructure applications per the manufacturer's suitability listing.","metaTitle":"Siemens 5SL3240-7MB SENTRON MCB, 2-Pole C 40 A, 4.5 kA","metaDescription":"Siemens SENTRON 5SL3240-7MB miniature circuit breaker, 2-pole, C-curve, 40 A, 4.5 kA breaking capacity at 400 V AC. Active production, sourced to order. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"36 mm","title":"5SL3240-7MB","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V 4.5 kA, 2-pole, C, 40 A","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"2P","Number Of Poles":"2","lifecycle_stage":"current","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"2","Product Designation":"Miniature circuit breaker","at AC / rated value":"40 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Energy Limitation Class":"3","according to EN 61346-2":"F","at 30 °C / rated value":"40 A","according to IEC 81346-2":"F","Suitability For Operation":"Residential buildings/infrastructure","Number Of Modular Width Units":"2","Tripping Characteristic Class":"C","at DC / rated value / maximum":"72 V","according to EN 60898 / rated value":"4.5 kA","supply voltage / at AC / rated value":"400 V","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 Hz","with multi-phase operation / at AC / rated value":"440 V","with single-phase operation / at AC / rated value":"250 V","Mechanical Service Life (Switching Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/3a5260073ea00545061e8ac4c6f0d7c9.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=131147&mlfb=5SL3240-7MB"},"ai":{"faq":[{"question":"Where can I buy 5SL3240-7MB and get a price?","answer":"We source this part to order against an RFQ. Submit a request for quote; availability and current pricing are confirmed at that time."},{"question":"What is the depth of 5SL3240-7MB?","answer":"The depth is 76 mm, with an installation depth of 70 mm. The width is 36 mm (2 modular units) and height is 90 mm."},{"question":"Will 5SL3240-7MB fit a panel designed for 5SL4106-7CC?","answer":"No — the 5SL3240-7MB is 36 mm wide (2 modular units) versus 18 mm for the 5SL4106-7CC. The depth and height match, but the wider footprint requires two adjacent DIN slots instead of one."},{"question":"What compliance documentation does Siemens provide for 5SL3240-7MB?","answer":"The part is designed to EN 60898 (4.5 kA breaking capacity) and carries the SENTRON brand. For specific RoHS, REACH, or UL declarations, refer to the manufacturer's documentation available through the product page."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL3240-7MB","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/5SL3240-7MB 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}}