{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SQ2370-2YA25","brand":"Siemens","brandSlug":"siemens","productSlug":"5SQ2370-2YA25","canonicalUrl":"https://aoctrl.com/siemens/5SQ2370-2YA25","factsUrl":"https://aoctrl.com/api/mcp/products/5SQ2370-2YA25","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SQ2370-2YA25, miniature circuit breaker, 3-pole, C characteristic, 25 A rated current, 3 kA breaking capacity at 400 V AC, IP20, 3 modular width units.","salesMarkdown":"The Siemens SENTRON 5SQ2370-2YA25 is a 3-pole miniature circuit breaker (MCB) with a C tripping characteristic, rated 25 A at 400 V AC. Its 3 kA breaking capacity per EN 60898 suits it for branch-circuit protection in residential and light commercial distribution boards where fault currents stay modest. The C-curve means it trips between 5 and 10 times rated current — standard for motor and lighting loads that see moderate inrush. ## Ratings and derating Rated 25 A at 30 °C ambient, the breaker derates to 23.75 A at 40 °C, 22.5 A at 50 °C, and 21.25 A at 60 °C. If your panel runs hot — common in a crowded enclosure — size the load to the derated value, not the 30 °C number. Pollution degree 3 and overvoltage category III mean it's rated for industrial environments where conductive dust or transient surges are expected. ## Mounting and integration Occupies 3 modular width units (roughly 54 mm) on a standard DIN rail. Installation depth is 55 mm — shallower than the 70 mm of the 5SL-series siblings, which matters when panel depth is tight. IP20 finger-safe terminals; no neutral pole switching (3P only, no switched neutral).","metaTitle":"Siemens 5SQ2370-2YA25 SENTRON MCB, 3-pole, C 25A, 3kA","metaDescription":"Siemens SENTRON 5SQ2370-2YA25 miniature circuit breaker, 3-pole, C-curve, 25 A, 3 kA breaking capacity per EN 60898, 400 V AC/DC. Current lifecycle stage. 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":"25 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":"25 A","at 40 °C / rated value":"23.75 A","at 45 °C / rated value":"23.13 A","at 50 °C / rated value":"22.5 A","at 55 °C / rated value":"21.88 A","at 60 °C / rated value":"21.25 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=185269&mlfb=5SQ2370-2YA25","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SQ2370-2YA25/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SQ2370-2YA25?","answer":"3 kA per EN 60898 at 400 V AC."},{"question":"What is the closest functional alternative to 5SQ2370-2YA25?","answer":"The 5SL4363-7 is a 3-pole C-curve 25 A MCB but with a 10 kA breaking capacity per EN 60898, a deeper 70 mm installation depth, and a wider operating temperature range (-40 to 75 °C). It also supports supplementary devices and has a higher mechanical life (10,000 cycles). The 5SQ2370-2YA25 is the shallower, lower-breaking-capacity option for panels where fault current is under 3 kA."},{"question":"Where can I buy 5SQ2370-2YA25?","answer":"Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SQ2370-2YA25","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/5SQ2370-2YA25 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}}