{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SQ3270-1BA20","brand":"Siemens","brandSlug":"siemens","productSlug":"5SQ3270-1BA20","canonicalUrl":"https://aoctrl.com/siemens/5SQ3270-1BA20","factsUrl":"https://aoctrl.com/api/mcp/products/5SQ3270-1BA20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SQ series, miniature circuit breaker (MCB), 2-pole (1P+N), C-curve, 20 A rated current, 240 V AC, 50 Hz, breaking capacity 3 kA per EN 60898 / 4.5 kA per IEC 60947-2, IP20, 55 mm installation depth.","salesMarkdown":"## Siemens SENTRON 5SQ3270-1BA20 — 20 A C-Curve MCB, 1P+N Breaking capacity is rated at 3 kA per EN 60898 and 4.5 kA per IEC 60947-2. That 4.5 kA figure under the industrial standard means this MCB can safely interrupt a fault up to 4.5 kA at 240 V AC without welding its contacts or rupturing the housing — sufficient for most sub-distribution boards fed from a transformer of 250 kVA or less. Neutral conductor switching is integrated, so you don't need a separate neutral bar or link for the switched neutral; the 1P+N design handles it inside the breaker housing.","metaTitle":"Siemens SENTRON 5SQ3270-1BA20 MCB, 2-Pole C-Curve 20 A, 3/4.","metaDescription":"Siemens SENTRON 5SQ3270-1BA20 miniature circuit breaker, 2-pole (1P+N), C-curve, 20 A rated. Breaking capacity 3 kA (EN 60898) / 4.5 kA (IEC 60947-2). 240 V AC, 50 Hz. Current prod","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":"20 A","Tripping characteristic class":"C","acc. to EN 60898 / rated value":"3 kA","acc. to IEC 60947-2 / rated value":"4.5 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":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=177856&mlfb=5SQ3270-1BA20","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SQ3270-1BA20/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SQ3270-1BA20?","answer":"3 kA per EN 60898 and 4.5 kA per IEC 60947-2 at 240 V AC."},{"question":"What does 1P+N mean on this breaker?","answer":"It means the breaker switches both the line and neutral poles, with the neutral pole opening and closing together with the line pole — no separate neutral switching device needed."},{"question":"Where can I buy 5SQ3270-1BA20 and get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"Will 5SQ3270-1BA20 drop into a panel specified for 5SQ2570-2YA50?","answer":"Both are 2-pole SENTRON 5SQ breakers with the same 55 mm depth and 2 width units, but 5SQ2570-2YA50 is a 2P (two protected poles) rated 50 A at 400 V, while 5SQ3270-1BA20 is 1P+N rated 20 A at 240 V. They share the same DIN-rail footprint and terminal layout, so physical fit is the same, but the electrical ratings differ — verify the circuit's voltage, current, and neutral switching requirements before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SQ3270-1BA20","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/5SQ3270-1BA20 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}}