{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SQ2570-0KA25","brand":"Siemens","brandSlug":"siemens","productSlug":"5SQ2570-0KA25","canonicalUrl":"https://aoctrl.com/siemens/5SQ2570-0KA25","factsUrl":"https://aoctrl.com/api/mcp/products/5SQ2570-0KA25","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SQ2570-0KA25, miniature circuit breaker, 2-pole 1P+N, C-curve, 25 A, 3 kA breaking capacity, 240 V AC, 50 Hz, IP20.","salesMarkdown":"The C-curve (tripping characteristic class C) means the magnetic trip fires at 5 to 10 times rated current — so for a 25 A breaker, instantaneous trip occurs between 125 A and 250 A. That's the right choice for circuits with a modest starting surge; a B-curve would nuisance-trip on the same load, while a D-curve would let a fault ride through too long. If your available fault current exceeds 3 kA, step up to the 6 kA or 10 kA SENTRON siblings. The 1P+N design switches the neutral pole but does not protect it — overcurrent sensing is on the phase pole only. That's standard for single-phase final subcircuits where the neutral is bonded to ground at the service entrance. Verify your local wiring rules allow switched neutral without protection before specifying. The 55 mm installation depth fits flush in shallow enclosures — a common constraint in retrofit panel work where gland-plate depth is tight. ## Deployment context Snap-on DIN rail mounting, IP20 finger-safe terminals — standard for enclosed distribution boards. The AC/DC voltage type means the same breaker can be used on DC circuits up to the manufacturer's rated DC voltage (not stated here, so verify for your specific DC application). Rated for 50 Hz only; not suitable for 60 Hz systems without checking the thermal-magnetic response at the higher frequency.","metaTitle":"Siemens SENTRON 5SQ2570-0KA25 MCB, 2-pole 1P+N, C-curve 25 A","metaDescription":"Siemens SENTRON 5SQ2570-0KA25 miniature circuit breaker, 2-pole 1P+N, C-curve 25 A, 3 kA breaking capacity per EN 60898/IEC 60947-2, 240 V AC, 50 Hz, IP20. Currently in production;","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Number of poles":"2","Type of voltage":"AC/DC","lifecycle_stage":"current","Installation depth":"55 mm","Product brand name":"SENTRON","Protection class IP":"IP20","Overvoltage category":"3","Energy limiting class":"3","Number of width units":"2","Number of poles / Note":"1P+N","circuit-breaker / Design":"5SQ","Current / at AC / rated value":"25 A","Tripping characteristic class":"C","acc. to EN 60898 / rated value":"3 kA","acc. to IEC 60947-2 / rated value":"3 kA","Supply voltage / at AC / rated value":"240 V","Supply voltage frequency / rated value":"50 Hz","Product function / neutral conductor switching":"Yes"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$54.91","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=509017&mlfb=5SQ2570-0KA25","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SQ2570-0KA25/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 5SQ2570-0KA25?","answer":"This part is sourced to order against an RFQ through independent distribution. Submit a request for quote; availability and current pricing are confirmed at quote time."},{"question":"What is the breaking capacity of 5SQ2570-0KA25?","answer":"3 kA per both EN 60898 and IEC 60947-2. That's the maximum fault current this breaker can safely interrupt at 240 V AC."},{"question":"Will 5SQ2570-0KA25 drop into a panel specified around 5SU9304-1KK32 without rewiring?","answer":"No — the 5SU9304-1KK32 is an RCBO (RCD-operated circuit breaker) with a 30 mA residual current trip and 10 kA breaking capacity, occupying 1 width unit. The 5SQ2570-0KA25 is a plain MCB with 3 kA breaking capacity at 2 width units. The footprint, fault rating, and protection function differ; rewiring and possibly a larger enclosure are required."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SQ2570-0KA25","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/5SQ2570-0KA25 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}}