{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SQ2370-2YA03","brand":"Siemens","brandSlug":"siemens","productSlug":"5SQ2370-2YA03","canonicalUrl":"https://aoctrl.com/siemens/5SQ2370-2YA03","factsUrl":"https://aoctrl.com/api/mcp/products/5SQ2370-2YA03","rawCanonicalId":null},"summary":{"shortDescription":"SENTRON 5SQ2370-2YA03, miniature circuit breaker, 3-pole, C characteristic, 3 A, 400 V AC, 3 kA per EN 60898, IP20, 3 modular width units.","salesMarkdown":"The C-curve (tripping characteristic class C) means the magnetic trip fires at 5 to 10 times rated current — 15 to 30 A for this 3 A unit. Thermal derating is published across the ambient range: 3 A at 30 °C, 2.85 A at 40 °C, down to 2.55 A at 60 °C. For a panel running at 50 °C ambient, figure 2.7 A continuous load maximum per pole. Overvoltage category III means it's rated for fixed-installation level — downstream of the utility meter, not for equipment-level protection.","metaTitle":"SENTRON 5SQ2370-2YA03 Miniature Circuit Breaker, 3P C 3A 400","metaDescription":"SENTRON 5SQ2370-2YA03 miniature circuit breaker, 3-pole, C-curve 3A, 400V AC, 3kA breaking capacity per EN 60898. IP20, 3 MW. Current production. Available to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Number Of Poles":"3","Type Of Voltage":"AC/DC","lifecycle_stage":"current","Installation Depth":"55 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","at AC / rated value":"3 A","protection class IP":"IP20","Overvoltage Category":"3","Design Of The Product":"Miniature circuit breaker 5SQ","Number Of Poles / Note":"3P","Energy Limitation Class":"3","at 30 °C / rated value":"3 A","at 40 °C / rated value":"2.85 A","at 45 °C / rated value":"2.78 A","at 50 °C / rated value":"2.7 A","at 55 °C / rated value":"2.63 A","at 60 °C / rated value":"2.55 A","Number Of Modular Width Units":"3","Tripping Characteristic Class":"C","acc. to EN 60898 / rated value":"3 kA","supply voltage / at AC / rated value":"400 V","Product Function / Neutral Conductor Switching":"No"}},"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=224412&mlfb=5SQ2370-2YA03","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SQ2370-2YA03/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SQ2370-2YA03?","answer":"3 kA per EN 60898 at 400 V AC. That is the standard domestic/commercial rating for this class of MCB."},{"question":"What is the C-curve trip range on this breaker?","answer":"The C characteristic trips magnetically at 5 to 10 times the rated current — for the 3 A unit, that is 15 to 30 A."},{"question":"Where can I buy 5SQ2370-2YA03?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing confirmed at quote time."},{"question":"Will 5SQ2370-2YA03 drop into a panel specified for 5SQ2370-2YA05?","answer":"Yes — same 3-pole footprint, 3 MW width, 55 mm depth, same terminal layout. The only difference is the current rating: 3 A versus 0.5 A on the -2YA05. No rewiring needed if the load is within the 3 A rating."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SQ2370-2YA03","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/5SQ2370-2YA03 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}}