{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SQ2260-0KA20","brand":"Siemens","brandSlug":"siemens","productSlug":"5SQ2260-0KA20","canonicalUrl":"https://aoctrl.com/siemens/5SQ2260-0KA20","factsUrl":"https://aoctrl.com/api/mcp/products/5SQ2260-0KA20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SQ T55 series, 5SQ2260-0KA20 miniature circuit breaker, 2-pole, B-curve, 20 A, 3 kA breaking capacity, 400 V AC/DC.","salesMarkdown":"## What this 20 A B-curve MCB does in a panel Neutral conductor switching is integrated (both poles break line and neutral), so it serves as a fully isolated disconnect for single-phase sub-circuits. The 2-module width (2 width units) fits standard DIN-rail enclosures; installation depth is 55 mm. Overvoltage category 3 and energy limiting class 3 place it in the fixed-installation distribution board, not the final-equipment sub-panel. The closest functional peer is the 5SQ2270-2YA04 — same 2-pole, 3 kA, 400 V AC/DC, same 55 mm depth and 2-module width. The deciding difference is the tripping curve: the 5SQ2260-0KA20 uses a B-curve, while the 5SQ2270-2YA04 uses a C-curve. IP20 finger-safe terminals; no additional shrouding needed inside an enclosed distribution board. Snap-on DIN-rail mount, 2 module spaces. The neutral pole is switched internally — no separate neutral bar required downstream of this breaker.","metaTitle":"Siemens SENTRON 5SQ2260-0KA20 MCB, 2P, B-Curve, 20A, 3kA","metaDescription":"Siemens SENTRON 5SQ2260-0KA20 miniature circuit breaker, 2-pole, B-curve, 20 A rated, 3 kA breaking capacity per EN 60898. IP20, 400 V AC/DC. Current lifecycle. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["2-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":"2P","circuit-breaker / Design":"5SQ","Current / at AC / rated value":"20 A","Tripping characteristic class":"B","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":"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=221042&mlfb=5SQ2260-0KA20","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SQ2260-0KA20/alternatives.json"},"ai":{"faq":[{"question":"Will 5SQ2260-0KA20 drop into a panel specified around 5SQ2270-2YA04 without rewiring?","answer":"Physically yes — same 2-pole footprint, same 2-module width, same 55 mm depth, same DIN-rail mount. But the tripping curve differs: B-curve vs C-curve. Verify the load inrush before swapping; a C-curve circuit may need the higher magnetic trip threshold to avoid nuisance trips on startup."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SQ2260-0KA20","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/5SQ2260-0KA20 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}}