{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SQ2370-2YA63","brand":"Siemens","brandSlug":"siemens","productSlug":"5SQ2370-2YA63","canonicalUrl":"https://aoctrl.com/siemens/5SQ2370-2YA63","factsUrl":"https://aoctrl.com/api/mcp/products/5SQ2370-2YA63","rawCanonicalId":null},"summary":{"shortDescription":"SENTRON 5SQ2370-2YA63, 3-pole miniature circuit breaker, C-curve, 63 A rated, 3 kA breaking capacity per EN 60898 at 400 V AC, 3 modular width units, IP20.","salesMarkdown":"Three modular width units (each 18 mm) on the DIN rail — 54 mm total. ## Thermal derating — the real ampacity At 40 °C it derates to 59.85 A; at 50 °C to 56.7 A; at 60 °C to 53.55 A. A 60 A continuous load in a 50 °C cabinet will nuisance-trip this breaker on thermal overload.","metaTitle":"SENTRON 5SQ2370-2YA63 Miniature Circuit Breaker, 3P C 63A 3k","metaDescription":"SENTRON 5SQ2370-2YA63 3-pole MCB, C-curve, 63 A rated, 3 kA breaking capacity per EN 60898 at 400 V AC. Current production. Quoted to order.","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":"63 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":"63 A","at 40 °C / rated value":"59.85 A","at 45 °C / rated value":"58.28 A","at 50 °C / rated value":"56.7 A","at 55 °C / rated value":"55.13 A","at 60 °C / rated value":"53.55 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":"$173.19","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=453134&mlfb=5SQ2370-2YA63","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SQ2370-2YA63/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SQ2370-2YA63?","answer":"3 kA rated breaking capacity per EN 60898 at 400 V AC. That's the standard for final subcircuits in a 400 V distribution board; upstream protection must limit fault current if the available short-circuit current exceeds 3 kA."},{"question":"Will 5SQ2370-2YA63 drop into a panel specified for 5SQ2370-2YA05?","answer":"Yes — same 3-pole footprint, same 55 mm installation depth, same 3 modular width units, same C-curve. The only difference is the current rating: 63 A vs 0.5 A. As long as the busbar and downstream conductors are sized for 63 A, it's a direct mechanical swap."},{"question":"How do I get pricing and availability for 5SQ2370-2YA63?","answer":"Submit an RFQ through this listing. The part is sourced to order through independent distribution; current pricing and stock position are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SQ2370-2YA63","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/5SQ2370-2YA63 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}}