{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SQ2370-2YA04","brand":"Siemens","brandSlug":"siemens","productSlug":"5SQ2370-2YA04","canonicalUrl":"https://aoctrl.com/siemens/5SQ2370-2YA04","factsUrl":"https://aoctrl.com/api/mcp/products/5SQ2370-2YA04","rawCanonicalId":null},"summary":{"shortDescription":"SENTRON 5SQ2370-2YA04, miniature circuit breaker, 3-pole, C-curve, 4 A rated, 3 kA breaking capacity per EN 60898, 400 V AC, IP20.","salesMarkdown":"The C-curve trips between 5 and 10 times rated current, so a 4 A breaker clears faults in the 20–40 A range, which matches the let-through of most domestic and small commercial loads. Rated for AC/DC supply voltage and overvoltage category 3, this breaker is suitable for fixed-installation panels where transient overvoltages from the mains are expected. The 55 mm installation depth and 3 width units mean it occupies 3 x 18 mm on a DIN rail — standard for a 3-pole MCB in a SENTRON distribution board. IP20 finger-safe protection is adequate for enclosed panel mounting; no additional touch protection is needed once the cover is on. Snap-on DIN rail mounting per EN 60715. The 55 mm depth leaves clearance behind the gland plate for wiring; no deep enclosure required. Neutral conductor switching is not integrated — the 3-pole version switches only the phases, so a separate neutral bar or 4-pole breaker is needed if neutral isolation is required. The energy limiting class 3 means this breaker limits let-through energy to a level that protects downstream wiring under fault conditions up to its 3 kA rating.","metaTitle":"SENTRON 5SQ2370-2YA04 MCB, 3-pole C 4A, 3 kA","metaDescription":"SENTRON 5SQ2370-2YA04 miniature circuit breaker, 3-pole, C-curve 4 A, 3 kA breaking capacity per EN 60898 at 400 V AC. Current production 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","Protection class IP":"IP20","Overvoltage category":"3","Energy limiting class":"3","Number of width units":"3","Number of poles / Note":"3P","circuit-breaker / Design":"5SQ","Current / at AC / rated value":"4 A","Tripping characteristic class":"C","acc. to EN 60898 / rated value":"3 kA","Supply voltage / at AC / rated value":"400 V","Supply voltage frequency / rated value":"50 Hz","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=171702&mlfb=5SQ2370-2YA04","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SQ2370-2YA04/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SQ2370-2YA04?","answer":"3 kA rated value according to EN 60898 at 400 V AC. This is suitable for residential and light commercial distribution boards where the prospective short-circuit current stays under 3 kA."},{"question":"Will 5SQ2370-2YA04 drop into a panel specified for 5SQ2370-2YA01 without rewiring?","answer":"Yes, the 5SQ2370-2YA01 is the same 3-pole, C-curve design at 1 A rating. The 5SQ2370-2YA04 at 4 A shares the same physical footprint, DIN-rail mounting, 55 mm depth, and terminal layout — no rewiring needed, just a higher current rating."},{"question":"Where can I buy 5SQ2370-2YA04 and how is it quoted?","answer":"This part is sourced through independent distribution channels and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time — submit an RFQ for your volume and delivery requirements."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SQ2370-2YA04","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/5SQ2370-2YA04 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}}