{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY7402-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY7402-7","canonicalUrl":"https://aoctrl.com/siemens/5SY7402-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY7402-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY7402-7, 4-pole miniature circuit breaker, C-curve, 2 A rated at 400 V AC, 15 kA breaking capacity per EN 60898, 50 kA per IEC 60947-2.","salesMarkdown":"The Siemens 5SY7402-7 is a SENTRON 4-pole miniature circuit breaker with a C-curve trip characteristic, rated 2 A at 400 V AC. It carries a 15 kA breaking capacity per EN 60898 and 50 kA per IEC 60947-2, giving it headroom for high-fault installations like industrial panel feeders or distribution sub-mains. The 15 kA rating under EN 60898 covers the standard domestic/commercial fault level; the 50 kA under IEC 60947-2 addresses industrial installations where the prospective short-circuit current at the panel is higher. That dual rating means the same MCB satisfies both a building-services spec and a machine-control cabinet spec without swapping parts. Snaps onto DIN rail via the quick assembly system; 4 modular width units (72 mm wide) occupy four 18 mm slots. Mounting position is unrestricted, so it can be installed vertically, horizontally, or flat in a panel without derating the 2 A rating. ## Thermal derating and environment Rated 2 A at 35 °C ambient; derates to 1.9 A at 40 °C, 1.85 A at 45 °C, 1.8 A at 50 °C, 1.75 A at 55 °C, and 1.7 A at 60 °C.","metaTitle":"Siemens 5SY7402-7 SENTRON MCB, 4P C-Curve 2A 400V AC","metaDescription":"Siemens 5SY7402-7 SENTRON 4-pole miniature circuit breaker, C-curve 2A rated at 400V AC, 15kA (EN 60898) / 50kA (IEC 60947-2). Current production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["4-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"72 mm","title":"5SY7402-7","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V 15kA, 4-pole, C, 2A, D=70 mm","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"4","Type Of Voltage":"AC","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":"400 V","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Number Of Poles / Note":"4P","acc. to DIN EN 61346-2":"F","Energy Limitation Class":"3","at 35 °C / rated value":"2 A","at 40 °C / rated value":"1.9 A","at 45 °C / rated value":"1.85 A","at 50 °C / rated value":"1.8 A","at 55 °C / rated value":"1.75 A","at 60 °C / rated value":"1.7 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"4","Tripping Characteristic Class":"C","acc. to EN 60898 / rated value":"15 kA","Position / Of Power Supply Cord":"Any","acc. to IEC 60947-2 / rated value":"50 kA","Product Feature / Touch Protection":"Yes","Supply Voltage Frequency / Rated Value":"50/60 Hz","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":"15 kA","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 Function / 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 (Operating Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/a9797e1b760f568beb1209c7c3d11b7d.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=438547&mlfb=5SY7402-7"},"ai":{"faq":[{"question":"What is the breaking capacity of the 5SY7402-7?","answer":"15 kA per EN 60898 and 50 kA per IEC 60947-2 at 400 V AC."},{"question":"What is the 5SY7402-7 used for?","answer":"It is a 4-pole C-curve miniature circuit breaker rated 2 A at 400 V AC, used for overcurrent and short-circuit protection in industrial panels, distribution sub-mains, and mechanical engineering applications."},{"question":"Where can I buy the 5SY7402-7?","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 width of the 5SY7402-7?","answer":"72 mm, which corresponds to 4 modular width units on a DIN rail."},{"question":"Does the 5SY7402-7 drop into a panel specified around the 5SY4304-7CV?","answer":"Both are 4-pole SENTRON MCBs on the same DIN-rail footprint, so physical fit is the same. The 5SY7402-7 is a C-curve 2 A unit; the 5SY4304-7CV is a different rating and curve — verify the trip characteristic and ampacity against the circuit design before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY7402-7","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/5SY7402-7 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}}