{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4140-7CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4140-7CC","canonicalUrl":"https://aoctrl.com/siemens/5SY4140-7CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4140-7CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4140-7CC, 1-pole miniature circuit breaker, 40 A rated, C tripping characteristic, 10 kA IEC breaking capacity, 18 mm wide.","salesMarkdown":"The Siemens 5SY4140-7CC is a SENTRON miniature circuit breaker (MCB) — a 1-pole, 40 A device with C-curve tripping characteristic, rated to interrupt 10 kA under IEC 60898. It occupies a single 18 mm modular width on a DIN rail, quick-assembly fastening, and mounts in any position. The IP20 rating applies with connected conductors — expected for panel-mounted breakers; the enclosure provides the rest of the ingress protection. ## Ratings that govern fit The headline 40 A rating holds at 35 °C ambient. Above that, the breaker derates: 36.76 A at 40 °C, 35 A at 45 °C, 33.16 A at 50 °C, and 31.24 A at 55 °C. Breaking capacity: 10 kA per IEC 60898, 5 kA per UL 1077 and CSA C22.2 No.235. Vibration resistance per IEC 60068-2-6: ±1 mm at 5 to 25 Hz, 50 m/s² at 25 to 150 Hz — enough for normal machine-mounted panels; not a concern unless the panel is on a high-vibration platform like a large press or engine test stand. The combined terminal at top and bottom accepts standard copper conductors. Sealable design allows lockout/tagout. Halogen-free and silicon-free construction — no silicone outgassing to foul contacts or optics in adjacent sensors.","metaTitle":"Siemens 5SY4140-7CC SENTRON MCB, 1P 40A C-curve, 10kA IEC","metaDescription":"Siemens 5SY4140-7CC SENTRON miniature circuit breaker, 1-pole 40A, C-trip, 10kA IEC breaking capacity. IP20 with conductors. Quoted to order against RFQ.","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","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","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 AC / rated value":"40 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","acc. to DIN EN 61346-2":"F","Energy Limitation Class":"3","at 35 °C / rated value":"40 A","at 40 °C / rated value":"36.76 A","at 45 °C / rated value":"35 A","at 50 °C / rated value":"33.16 A","at 55 °C / rated value":"31.24 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"1","Tripping Characteristic Class":"C","acc. to EN 60898 / rated value":"10 kA","Position / Of Power Supply Cord":"Any","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","Type Of Voltage / Of The Operating Voltage":"AC","at AC / acc. to UL 1077 and CSA C22.2 No.235":"5 kA","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","with multi-phase operation / at AC / rated value":"440 V","operating voltage / at DC / rated value / maximum":"72 V","with single-phase operation / at AC / rated value":"440 V","Mechanical Service Life (Switching Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/f9f64ee6076b8c9841719807b61efeab.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=233527&mlfb=5SY4140-7CC","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY4140-7CC/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SY4140-7CC and get a price?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the closest functional second-source to 5SY4140-7CC?","answer":"Within the same SENTRON 5SY4 family, a 40 A C-curve 1-pole MCB like 5SY4116-7CV (if that is a 40 A variant — verify the rating on the peer) shares the same 18 mm footprint, DIN-rail mount, and 10 kA IEC breaking capacity, so it drops into the same panel position without rewiring. The deciding factor is the exact current rating and any local approval requirement."},{"question":"What is the listed depth and width of 5SY4140-7CC?","answer":"Depth 76 mm, width 18 mm (one modular unit)."},{"question":"Will 5SY4140-7CC drop into a panel specified around 5SY4116-7CV without rewiring?","answer":"Yes — both are 1-pole, 18 mm wide SENTRON MCBs with the same mounting system and terminal layout. No rewiring needed if the current rating and trip curve match the circuit design."},{"question":"What compliance documentation does Siemens provide for 5SY4140-7CC?","answer":"The breaker carries IEC 60898 rating (10 kA), UL 1077 and CSA C22.2 No.235 (5 kA). It is halogen-free and silicon-free. Full RoHS and REACH declarations are available from Siemens on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4140-7CC","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/5SY4140-7CC 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}}