{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SQ2270-0KA04","brand":"Siemens","brandSlug":"siemens","productSlug":"5SQ2270-0KA04","canonicalUrl":"https://aoctrl.com/siemens/5SQ2270-0KA04","factsUrl":"https://aoctrl.com/api/mcp/products/5SQ2270-0KA04","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SQ2270-0KA04, miniature circuit breaker, 2-pole, C-curve, 4 A rated current, 3 kA breaking capacity (EN 60898 / IEC 60947-2), 400 V AC, 50 Hz, IP20, 55 mm depth.","salesMarkdown":"The Siemens SENTRON 5SQ2270-0KA04 is a 2-pole miniature circuit breaker with C-curve tripping characteristic, rated 4 A at 400 V AC, 50 Hz. The 5SQ2270-0KA04 sits in the SENTRON 5SQ family alongside higher-pole siblings. The 4-pole 5SQ2670-0KA15 (15 A, C-curve, 3 kA) shares the same 55 mm depth and IP20 rating — the difference is pole count and current rating. If your BOM calls for a 2-pole 4 A breaker, the 5SQ2270-0KA04 is the direct fit; the 4-pole variant would occupy three width units instead of two and requires a neutral conductor switching path. Two width units (standard 18 mm per pole) means it takes up 36 mm on the DIN rail — plan the rail fill accordingly. Installation depth of 55 mm fits standard distribution boards and sub-panels. The neutral conductor switching function is built in, so the neutral pole opens and closes with the phase pole. Energy limiting class 3 means the breaker limits let-through energy during a fault — less stress on downstream components and wiring. The 5SQ design (design of the product) is Siemens' compact MCB platform for 50 Hz networks. AC/DC voltage type means it can also be applied in DC circuits up to the rated voltage, though the 3 kA breaking capacity should be verified against the DC fault current available.","metaTitle":"Siemens 5SQ2270-0KA04 SENTRON MCB, 2-Pole C-Curve 4A 3kA","metaDescription":"Siemens SENTRON 5SQ2270-0KA04 miniature circuit breaker. 2-pole, C-curve, 4A, 3kA breaking capacity per EN 60898 / IEC 60947-2. 400V AC, 50Hz. Current lifecycle. Available 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","Degree of pollution":"3","Product designation":"Miniature circuit breaker","protection class IP":"IP20","Overvoltage Category":"3","Design of the product":"Miniature circuit breaker 5SQ","Energy limiting class":"3","Number Of Width Units":"2","Number Of Poles / Note":"2P","circuit-breaker / Design":"5SQ","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","operating current / at AC / rated value":"4 A","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=278058&mlfb=5SQ2270-0KA04","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SQ2270-0KA04/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of the 5SQ2270-0KA04?","answer":"The 5SQ2270-0KA04 is rated 3 kA breaking capacity per both EN 60898 and IEC 60947-2 at 400 V AC."},{"question":"Where can I buy the 5SQ2270-0KA04?","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":"Does the 5SQ2270-0KA04 switch the neutral?","answer":"Yes, the product function includes neutral conductor switching — both poles (phase and neutral) open and close together."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SQ2270-0KA04","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/5SQ2270-0KA04 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}}