{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY5140-7CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY5140-7CC","canonicalUrl":"https://aoctrl.com/siemens/5SY5140-7CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SY5140-7CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY5140-7CC, 1-pole miniature circuit breaker, C-curve, 40 A at 35 °C, DC rated 220 V, 10 kA breaking capacity, IP20, halogen-free.","salesMarkdown":"## What it is and what it does The Siemens 5SY5140-7CC is a 1-pole miniature circuit breaker from the SENTRON family, designed for DC branch-circuit protection. Its C-curve tripping characteristic means it handles moderate inrush currents — typical for motor starters, contactor coils, and control transformers — without nuisance trips, while still clearing overloads and short circuits. Rated 40 A at 35 °C and 37.28 A at 40 °C, it's sized for a 40 A DC load at a 35 °C ambient; above that, the thermal derating is already on the nameplate. The DC breaking capacity is 10 kA per IEC 60947-2, which covers most industrial 220 V DC bus faults. Pollution degree 3 and overvoltage category III place it in fixed industrial panels where conductive dust and switching transients are normal. ## Panel fit and mounting Width is 18 mm — one modular unit on a standard DIN rail. Depth is 76 mm, with an installation depth of 70 mm. The quick-assembly fastening method clips onto the rail without tools; mounting position is any orientation. Combined terminals top and bottom accept both busbar and wire connections. IP20 with connected conductors means it's protected against finger contact but not washdown — standard for enclosed panelboards. Halogen-free and silicon-free construction matters for clean-room or high-reliability environments where outgassing can contaminate contacts or optics.","metaTitle":"Siemens 5SY5140-7CC SENTRON MCB, 1P C-curve 40A DC 220V","metaDescription":"Siemens 5SY5140-7CC SENTRON miniature circuit breaker, 1-pole, C-curve, 40A at 35°C, DC rated 220V, 10kA breaking capacity. IP20, halogen-free. Current lifecycle, sourced to order.","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":"5SY5140-7CC","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit-breaker 220 V DC 10kA, 1-pole, C, 40 A","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"1P","Number Of Poles":"1","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","acc. to IEC 81346-2":"F","at DC / rated value":"220 V","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Design Of The Product":"Machine manufacture / industry","acc. to DIN EN 61346-2":"F","at 35 °C / rated value":"40 A","at 40 °C / rated value":"37.28 A","at 45 °C / rated value":"35.84 A","at 50 °C / rated value":"34.32 A","at 55 °C / rated value":"32.76 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"1","Tripping Characteristic Class":"C","Position / Of Power Supply Cord":"Consider polarity","Product Feature / Touch Protection":"Yes","Influence Of The Surrounding Temperature":"max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C","at DC / acc. to IEC 60947-2 / rated value":"10 kA","Type Of Voltage / Of The Operating Voltage":"DC","vibration resistance / acc. to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","Product Component / Neutral Conductor Switching":"No","operating voltage / at DC / rated value / maximum":"250 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/afde6e8e53466b81d18df75f2e60ac60.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=311166&mlfb=5SY5140-7CC"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY5140-7CC","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/5SY5140-7CC 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}}