{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SQ2370-0KA03","brand":"Siemens","brandSlug":"siemens","productSlug":"5SQ2370-0KA03","canonicalUrl":"https://aoctrl.com/siemens/5SQ2370-0KA03","factsUrl":"https://aoctrl.com/api/mcp/products/5SQ2370-0KA03","rawCanonicalId":null},"summary":{"shortDescription":"SENTRON 5SQ2370-0KA03, 3-pole miniature circuit breaker, C tripping characteristic, 3 A rated current, 3 kA breaking capacity at 400 V AC, 50 Hz, IP20.","salesMarkdown":"## SENTRON 5SQ2370-0KA03 — 3-pole C-curve MCB at 3 A, 3 kA The SENTRON 5SQ2370-0KA03 is a 3-pole miniature circuit breaker rated 3 A with a C tripping characteristic, designed for 400 V AC, 50 Hz systems. IP20 finger-safe terminals suit dry indoor panels; no washdown rating. Neutral conductor not switched through the breaker — plan for a separate neutral bar or a 4-pole variant if isolation on all poles is required.","metaTitle":"SENTRON 5SQ2370-0KA03 Circuit Breaker, 3-Pole C 3A, 3 kA","metaDescription":"SENTRON 5SQ2370-0KA03 3-pole MCB, C-curve 3A, 3 kA breaking capacity per EN 60898 & IEC 60947-2, 400 V AC, 50 Hz, IP20. Active lifecycle, available to order. Request a quote.","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":"3 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":"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=294058&mlfb=5SQ2370-0KA03","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SQ2370-0KA03/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of the 5SQ2370-0KA03?","answer":"It is rated 3 kA at 400 V AC per both EN 60898 and IEC 60947-2, so it safely interrupts fault currents up to that level without cascading upstream."},{"question":"Will the 5SQ2370-0KA03 drop into a panel specified for the 5SQ2370-2YA04?","answer":"Yes, the 5SQ2370-2YA04 shares the same 3-pole form factor, 55 mm depth, and 3 kA breaking capacity — the only difference is its 4 A rating versus the 3 A on this part. Panel wiring and DIN-rail footprint are identical."},{"question":"Where can I buy the 5SQ2370-0KA03?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit a request for a firm offer."},{"question":"What is the tripping characteristic of this breaker?","answer":"C-curve, which trips magnetically at 5× to 10× rated current. That means the 3 A unit holds through brief inrush from small motors or transformers but clears fast on a hard short."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SQ2370-0KA03","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/5SQ2370-0KA03 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}}