{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SQ2670-0KA40","brand":"Siemens","brandSlug":"siemens","productSlug":"5SQ2670-0KA40","canonicalUrl":"https://aoctrl.com/siemens/5SQ2670-0KA40","factsUrl":"https://aoctrl.com/api/mcp/products/5SQ2670-0KA40","rawCanonicalId":null},"summary":{"shortDescription":"SENTRON 5SQ2670-0KA40, 4-pole MCB, 40 A, C-curve, 3 kA breaking capacity per EN 60898, 400 V AC, 50 Hz, IP20, 3 width units.","salesMarkdown":"It carries a 40 A rated current at 400 V AC, 50 Hz, with a C tripping characteristic — meaning it holds up to 5–10× rated current for short overloads and trips faster on higher faults, typical for motor and general-purpose branch circuits. Snap-on DIN-rail mount, 3 width units (approx. 54 mm), installation depth 55 mm. IP20 finger-safe terminals. Overvoltage category 3 and energy limiting class 3 — suitable for fixed-installation distribution boards where the breaker provides both overload and short-circuit protection downstream. The switched neutral (3P+N) means the neutral is disconnected when the breaker is off, which some local wiring codes require for final circuits.","metaTitle":"SENTRON 5SQ2670-0KA40 MCB, 4P, 40 A, C-curve, 3 kA","metaDescription":"SENTRON 5SQ2670-0KA40 4-pole MCB, 40 A, C tripping characteristic, 3 kA breaking capacity per EN 60898, 400 V AC, IP20. Active lifecycle. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Number of poles":"4","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+N","circuit-breaker / Design":"5SQ","Current / at AC / rated value":"40 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":"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=164729&mlfb=5SQ2670-0KA40","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SQ2670-0KA40/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SQ2670-0KA40?","answer":"3 kA per EN 60898 at 400 V AC, which is the standard rating for this class of MCB in residential and light commercial distribution boards."},{"question":"Will 5SQ2670-0KA40 drop into a panel specified around 5SQ2670-0KA15 without rewiring?","answer":"Yes — both are 4-pole 3P+N, same 55 mm depth, same 3 width units, same C-curve. The only difference is the 40 A rating versus 15 A. The panel busbar and wiring must be sized for 40 A; if the existing circuit is wired for 15 A, the breaker will not protect the smaller conductors."},{"question":"Where can I buy 5SQ2670-0KA40?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SQ2670-0KA40","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/5SQ2670-0KA40 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}}