{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL6540-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL6540-7","canonicalUrl":"https://aoctrl.com/siemens/5SL6540-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SL6540-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL6540-7 miniature circuit breaker, 1P+N, C-curve, 40 A, 6 kA per EN 60898, 230 V AC, 2 MW, IP20.","salesMarkdown":"## What it is and what it does The Siemens SENTRON 5SL6540-7 is a 1P+N miniature circuit breaker (MCB) with a C tripping characteristic, rated 40 A at 230 V AC and a 6 kA breaking capacity per EN 60898. It switches the neutral conductor along with the line, so it's a single-module-width (2 MW) unit that fits standard DIN-rail distribution boards in residential and light commercial infrastructure. ## What the ratings mean for fit The C-curve means the magnetic trip activates at 5–10× rated current — designed for loads with moderate inrush like small motors, fluorescent lighting banks, or transformer-coupled circuits. At 40 A and 6 kA SCCR, it handles typical residential and light commercial fault levels; the same 6 kA rating applies under IEC 60947-2 for industrial panel applications where the standard demands it. Thermal derating is published: full 40 A at 30 °C ambient, 37.57 A at 40 °C, 36.8 A at 45 °C, and 33.61 A at 55 °C (–). If your panel ambient runs above 30 °C, size the upstream protection for the derated figure — the breaker will hold at its published curve, not the nameplate 40 A. Mechanical service life is 10,000 switching cycles — fine for a distribution board where the breaker is rarely operated, but not rated for frequent switching duty like a motor-disconnect application. ## Panel fit and mounting Width is 36 mm (2 modular units), depth 76 mm, height 90 mm, installation depth 70 mm. Snaps onto standard 35 mm DIN rail; mounting position is unrestricted. The housing is halogen-free and silicon-free — relevant for panels in clean-room or semiconductor-adjacent environments where outgassing is a concern. IP20 with connected conductors — protected against finger contact but not water ingress; install inside a sealed enclosure if washdown or outdoor exposure is expected. Overvoltage category III and pollution degree 2 cover fixed-installation distribution panels.","metaTitle":"5SL6540-7 SENTRON MCB, 1P+N, C-curve, 40 A, 6 kA","metaDescription":"Siemens SENTRON 5SL6540-7 miniature circuit breaker, 1P+N, 40 A, C characteristic, 6 kA breaking capacity per EN 60898. Active production, sourced to order. Request RFQ for current","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"36 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"1P+N","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","at 40 °C / rated value":"37.57 A","at 45 °C / rated value":"36.8 A","at 55 °C / rated value":"33.61 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","Product Feature / Touch Protection":"Yes","according to EN 60898 / rated value":"6 kA","supply voltage / at AC / rated value":"230 V","according to IEC 60947-2 / rated value":"6 kA","Type Of Voltage / Of The Operating Voltage":"AC","Product Component / Neutral Conductor Switching":"Yes","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,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/202cc609e545d6d3658178577b1f8110.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=45062&mlfb=5SL6540-7","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SL6540-7/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SL6540-7?","answer":"6 kA per EN 60898 and also 6 kA per IEC 60947-2 at 230 V AC."},{"question":"What is the width of 5SL6540-7 in modular units?","answer":"2 modular width units, which is 36 mm."},{"question":"Does 5SL6540-7 switch the neutral?","answer":"Yes, it has neutral conductor switching in a 1P+N design."},{"question":"Where can I buy 5SL6540-7 and get current pricing?","answer":"We source and quote this part to order against an RFQ. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm response."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL6540-7","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/5SL6540-7 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}