{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4218-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4218-7","canonicalUrl":"https://aoctrl.com/siemens/5SY4218-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4218-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4218-7, 2-pole miniature circuit breaker, C-curve, 10 kA per EN 60898, 20 kA per IEC 60947-2, 400 V AC, 36 mm wide.","salesMarkdown":"## Breaking capacity and what it means on your line This breaker carries a 10 kA interrupting rating per IEC/EN 60898-1, and 20 kA per IEC 60947-2 at 400 V AC. For DC circuits, it's rated 15 kA at 60 V (72 V max) per IEC 60947-2, and under UL 1077 it's listed for 5 kA. The dual rating means it's built for IEC-spec panels globally but also carries the UL mark for North American machinery control panels. ## Panel fit and environmental tolerance The 5SY4218-7 occupies 2 modular width units (36 mm) on a DIN rail, with a depth of 76 mm and an installation depth of 70 mm. It mounts in any position, and the terminals accept top and bottom comb busbars for easy distribution. Temperature range runs from -40 °C to 75 °C, with humidity derating above 55 °C (95% at 55 °C, down to 35% at 75 °C). That covers most plant-floor environments, including unheated warehouses and outdoor-rated enclosures. IP20 with conductors connected — standard for inside a closed panel.","metaTitle":"Siemens 5SY4218-7 SENTRON MCB, 2-Pole C-Curve, 10 kA","metaDescription":"Siemens 5SY4218-7 SENTRON miniature circuit breaker, 2-pole, C-curve, 10 kA (EN 60898) / 20 kA (IEC 60947-2). Active production. Sourced to order. RFQ for pricing.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"36 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60898-1, IEC / EN 60947-2 / UL1077","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"2P","Number Of Poles":"2","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","at AC rated value":"400 V","at DC rated value":"60 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","Energy Limitation Class":"3","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Neutral Conductor Switching":"No","Number Of Modular Width Units":"2","Position Of Power Supply Cord":"Any","Tripping Characteristic Class":"C","according to EN 60898 rated value":"10 kA","according to IEC 60947-2 rated value":"20 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","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":"72 V","with multi-phase operation at AC rated value":"440 V","with single-phase operation at AC rated value":"440 V","at AC according to UL 1077 and CSA C22.2 No.235":"5 kA","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":"10 000","Product Extension Installable Supplementary Devices":"Yes","power loss [W] for rated value of the current at AC in hot operating state per pole":"1.5 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$27.94","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/348bc0347fe03889f13498a1301e3165.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=237844&mlfb=5SY4218-7","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY4218-7/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SY4218-7 and get a price?","answer":"We source this breaker to order through independent distribution. Submit an RFQ for current pricing and availability — confirmed at quote time."},{"question":"What is the difference between 5SY4218-7 and 5SY4140-7?","answer":"The 5SY4140-7 is also a 2-pole SENTRON MCB but with a lower current rating. The 5SY4218-7 carries a higher amp rating for heavier branch circuits. Both share the same 36 mm width and DIN-rail footprint, so a panel wired for one can accept the other without re-drilling or busbar changes — just verify the load current matches the new breaker's rating."},{"question":"What compliance documentation does Siemens provide for 5SY4218-7?","answer":"This breaker is certified to IEC/EN 60898-1, IEC/EN 60947-2, and UL 1077. It carries CE marking for the European market and UL/CSA listings for North America. The housing is halogen-free and silicon-free, supporting RoHS and REACH compliance requirements."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4218-7","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/5SY4218-7 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}}