{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY6040-7CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY6040-7CC","canonicalUrl":"https://aoctrl.com/siemens/5SY6040-7CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SY6040-7CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY6040-7CC miniature circuit breaker, 40 A, C characteristic, 1P+N, 6 kA per EN 60898, 1 MW wide.","salesMarkdown":"## What it is and what the ratings mean The Siemens SENTRON 5SY6040-7CC is a 1P+N miniature circuit breaker rated 40 A with a C tripping characteristic, breaking 6 kA per EN 60898. The C-curve means it trips between 5 and 10 times rated current — standard for general-purpose loads like lighting, socket circuits, and small distribution boards where moderate inrush is expected. The 6 kA breaking capacity at 250 V AC tells you it can safely interrupt a fault current up to that level without welding contacts or cascading upstream, which is the typical requirement for residential and light commercial sub-distribution. Rated current is temperature-dependent: 40 A at 30 °C, derated to 38 A at 40 °C and 37.2 A at 45 °C. If your panel runs hot, size the downstream load against the derated figure, not the 30 °C number. ## Where it goes and how it mounts Snaps onto standard DIN rail (35 mm), occupies one modular width (18 mm), and can be mounted in any position. Depth is 76 mm, installation depth 70 mm — fits standard distribution enclosures without a deep-can requirement. IP20 with conductors connected, so it belongs inside a panel or enclosure, not exposed to washdown or outdoor weather. Rated for overvoltage category III and pollution degree 2 — the usual spec for fixed-installation distribution boards in dry, non-conductive environments.","metaTitle":"Siemens 5SY6040-7CC SENTRON MCB, 40A C-Curve 1P+N 6kA","metaDescription":"Siemens SENTRON 5SY6040-7CC miniature circuit breaker, 40A rated, C tripping characteristic, 1P+N, 6kA breaking capacity per EN 60898. Active production, sourced to order. Request","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"18 mm","title":"5SY6040-7CC","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"CIRCUIT BREAKER, 1MW 230V, 6KA, 1+N-POLE, C, 40A","Halogen-Free":"Yes","Silicon-Free":"Yes","Type Of Voltage":"AC","lifecycle_stage":"current","Fastening Method":"standard rail","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"2","Product Designation":"Miniature circuit breaker","acc. to IEC 81346-2":"F","at AC / rated value":"40 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"No","Design Of The Product":"Miniature circuit breaker compact","Number Of Poles / Note":"1P+N","acc. to DIN EN 61346-2":"F","Energy Limitation Class":"3","at 30 °C / rated value":"40 A","at 40 °C / rated value":"38 A","at 45 °C / rated value":"37.2 A","Combined Terminal Bottom":"No","Suitability For Operation":"Residential buildings/infrastructure","Number Of Modular Width Units":"1","Tripping Characteristic Class":"C","acc. to EN 60898 / rated value":"6 kA","Position / Of Power Supply Cord":"Any","Product Feature / Touch Protection":"Yes","Supply Voltage Frequency / Rated Value":"50/60 Hz","Influence Of The Surrounding Temperature":"45°C, max. 95% humidity","insulation voltage / at AC / rated value":"250 V","vibration resistance / acc. to IEC 60068-2-6":"Yes","with single-phase operation / at AC / maximum":"250 V","Product Function / Neutral Conductor Switching":"Yes","Mechanical Service Life (Switching Cycles) / Typical":"4 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/8d464c65a3bf4550f6e38af0e4c9a670.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=752844&mlfb=5SY6040-7CC"},"ai":{"faq":[{"question":"What is the breaking capacity of the 5SY6040-7CC?","answer":"6 kA per EN 60898 at 250 V AC, which covers standard residential and light commercial fault levels."},{"question":"What is the width of the 5SY6040-7CC?","answer":"18 mm, which is one modular unit (1 MW) on a standard DIN rail."},{"question":"Where can I buy the 5SY6040-7CC?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Submit a request for current pricing and availability."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY6040-7CC","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/5SY6040-7CC 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}}