{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY5140-7KK11","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY5140-7KK11","canonicalUrl":"https://aoctrl.com/siemens/5SY5140-7KK11","factsUrl":"https://aoctrl.com/api/mcp/products/5SY5140-7KK11","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY5140-7KK11 miniature circuit breaker, 1-pole, C-curve, 10 kA breaking capacity per EN 60898, 15 kA per IEC 60947-2 at DC, 18 mm width, 76 mm depth.","salesMarkdown":"## What it is — and what the ratings mean for fit The Siemens SENTRON 5SY5140-7KK11 is a 1-pole miniature circuit breaker with a C tripping characteristic, designed for universal-current operation (AC/DC) and built to railway application standards. The C-curve means it trips at 5–10 times rated current — the standard choice for moderate inrush loads like small motors, transformers, and lighting banks. Breaking capacity sits at 10 kA per EN 60898 and 15 kA per IEC 60947-2 at DC, so it handles fault currents up to that level without welding contacts or cascading upstream. That 15 kA DC rating is the one to watch if you're protecting a DC bus or battery-backed circuit — the EN number alone undersells it. ## Panel fit and mounting Snaps onto DIN rail via the quick-assembly system — no tools needed for the rail, just a screwdriver for the terminals. At 18 mm wide (1 modular width) and 70 mm installation depth, it leaves room for adjacent breakers and wiring ducts in a crowded enclosure. The combined terminal top and bottom accept conductors from either side, which saves a bend when you're landing the feed. Mounting position is any, so you can run it sideways in a shallow gland-plate layout without derating the thermal trip.","metaTitle":"Siemens SENTRON 5SY5140-7KK11 MCB, C-curve, 10kA, 1-pole","metaDescription":"Siemens SENTRON 5SY5140-7KK11 miniature circuit breaker, 1-pole, C-curve, 10kA breaking capacity per EN 60898. Active production. Sourced 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","at AC rated value":"400 V","at DC rated value":"220 V","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Design Of The Product":"For railway applications","Energy Limitation Class":"3","Combined Terminal Bottom":"Yes","Suitability For Operation":"universal current","Neutral Conductor Switching":"No","Number Of Modular Width Units":"1","Position Of Power Supply Cord":"AC as required, observe DC polarity","Tripping Characteristic Class":"C","at DC according to EN 60898-2":"10 kA","according to EN 60898 rated value":"10 kA","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/DC","at DC according to IEC 60947-2 rated value":"15 kA","Value Range Of The Supply Voltage Frequency":"50/60 Hz","operating voltage at DC rated value maximum":"250 V","with multi-phase operation at AC rated value":"440 V","with single-phase operation at AC rated value":"440 V","vibration resistance according to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","Mechanical Service Life (Operating Cycles) Typical":"5 000","Product Extension Installable Supplementary Devices":"Yes","supply voltage with single-phase operation at AC rated value":"230 V","power loss [W] for rated value of the current at AC in hot operating state per pole":"3.5 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=199981&mlfb=5SY5140-7KK11","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY5140-7KK11/alternatives.json"},"ai":{"faq":[{"question":"How do I get pricing and availability for 5SY5140-7KK11?","answer":"Submit an RFQ through this listing. The part is sourced to order through independent distribution; current pricing and stock levels are confirmed at quote time."},{"question":"Will 5SY5140-7KK11 drop into a panel built for 5SY5240-7?","answer":"The 5SY5240-7 is a 2-pole variant. The 1-pole 5SY5140-7KK11 shares the same 18 mm width per pole, same DIN-rail mounting, and same terminal layout, so it fits the same rail footprint — but you'd need one per pole and a separate neutral bar if the original panel used a 2-pole unit."},{"question":"What compliance documentation does this brand provide?","answer":"The SENTRON series carries the usual Siemens declarations for RoHS, REACH, and applicable IEC/EN standards. Specific certificates (UL, CSA, EAC) should be confirmed against the exact variant at quote time — the evidence does not list them individually."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY5140-7KK11","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/5SY5140-7KK11 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}}