{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SQ2270-0KA40","brand":"Siemens","brandSlug":"siemens","productSlug":"5SQ2270-0KA40","canonicalUrl":"https://aoctrl.com/siemens/5SQ2270-0KA40","factsUrl":"https://aoctrl.com/api/mcp/products/5SQ2270-0KA40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SQ series, 5SQ2270-0KA40, 2-pole miniature circuit breaker, 40 A rated current, C tripping characteristic, 3 kA breaking capacity per EN 60898, 400 V AC, IP20.","salesMarkdown":"The Siemens SENTRON 5SQ2270-0KA40 is a 2-pole miniature circuit breaker rated for 40 A at 400 V AC, with a C tripping characteristic and a 3 kA breaking capacity per EN 60898. It also handles DC circuits (type of voltage AC/DC). This is the part for a 40 A branch circuit needing a C-curve — the magnetic trip holds through moderate inrush (motor starts, capacitor banks, transformer energization) and clears on sustained overload. Snaps onto standard DIN rail. Occupies 2 width units (about 36 mm) and has an installation depth of 55 mm — shallow enough for most flush-mount enclosures. IP20 rated, so it belongs inside a closed distribution board or panel, not in a wet or dusty location. Neutral conductor switching is integrated (product function / neutral conductor switching = Yes), which simplifies wiring in 2P applications where you want to isolate both phase and neutral.","metaTitle":"Siemens SENTRON 5SQ2270-0KA40 Circuit Breaker, 2-Pole, C, 40","metaDescription":"Siemens SENTRON 5SQ2270-0KA40 2-pole MCB, 40 A, C-curve, 3 kA per EN 60898, 400 V AC/DC. IP20, 55 mm depth. Current lifecycle stage. Sourced to order against RFQ.","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":"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":"$91.54","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=28801&mlfb=5SQ2270-0KA40","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SQ2270-0KA40/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SQ2270-0KA40?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the breaking capacity of 5SQ2270-0KA40?","answer":"The breaking capacity is 3 kA according to EN 60898 at 400 V AC."},{"question":"What does the C tripping characteristic mean on this breaker?","answer":"The C-curve means the magnetic trip activates at 5 to 10 times the rated current (200 to 400 A for this 40 A unit). It is suited for circuits with moderate inrush, such as motor starters or small transformers, where a B-curve would nuisance-trip."},{"question":"Will 5SQ2270-0KA40 drop into a panel specified around 5SU9304-1KK32?","answer":"No — the 5SU9304-1KK32 is an RCBO (RCD + MCB) with 1P+N design, 32 A, and a 10 kA breaking capacity. The 5SQ2270-0KA40 is a plain MCB, 2-pole, 40 A, 3 kA. They are not drop-in interchangeable; the panel wiring and fault-current rating differ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SQ2270-0KA40","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/5SQ2270-0KA40 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}}