{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SQ2270-0KA02","brand":"Siemens","brandSlug":"siemens","productSlug":"5SQ2270-0KA02","canonicalUrl":"https://aoctrl.com/siemens/5SQ2270-0KA02","factsUrl":"https://aoctrl.com/api/mcp/products/5SQ2270-0KA02","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON T55 miniature circuit breaker, 5SQ2270-0KA02, 2-pole (2P), C-curve, 2 A rated, 400 V AC, 3 kA breaking capacity per EN 60898, IP20, 55 mm depth, 2 width units.","salesMarkdown":"## Branch-circuit protection for 2 A loads It switches both line and neutral conductors (2P), making it suitable for single-phase or split-phase branch circuits where disconnecting the neutral is required. Overvoltage category 3 and energy limiting class 3 mean it's designed for fixed-installation mains with high prospective fault currents, limiting let-through energy to protect downstream wiring. The C-curve trips magnetically at 5 to 10 times the rated current (10–20 A for this 2 A unit). That's the sweet spot for moderate inrush loads: small transformers, contactor coils, lighting ballasts, and control-circuit power supplies. It avoids nuisance tripping from brief start-up surges while still clearing hard faults quickly. For purely resistive loads or long cable runs, a B-curve would trip earlier; for motor circuits with higher inrush, a D-curve would be more forgiving. The 55 mm depth clears most enclosure doors without interference. IP20 finger-safe protection means it must be installed inside a closed panel or distribution board — not for open-panel or wet-area use. Terminals accept copper conductors up to 25 mm², typical for branch-circuit wiring.","metaTitle":"Siemens SENTRON 5SQ2270-0KA02 MCB, 2-Pole C 2A 400V","metaDescription":"Siemens SENTRON 5SQ2270-0KA02 miniature circuit breaker, 2-pole, C-curve, 2 A, 400 V AC, 3 kA per EN 60898. IP20, 55 mm depth. Current production. 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":"2 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":"$86.84","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=133464&mlfb=5SQ2270-0KA02","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SQ2270-0KA02/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of the 5SQ2270-0KA02?","answer":"3 kA rated breaking capacity per EN 60898 at 400 V AC. This covers standard residential and light commercial fault levels; for higher SCCR requirements, check the IEC 60947-2 rating on the 4-pole sibling 5SQ2670-0KA15 which carries both ratings."},{"question":"How do I get current pricing and availability for 5SQ2270-0KA02?","answer":"Submit an RFQ through this listing. Pricing and stock levels are confirmed at quote time through our independent distribution network — no automated price or lead-time figure is published here."},{"question":"Does the 5SQ2270-0KA02 switch the neutral conductor?","answer":"Yes, it is a 2-pole (2P) breaker that switches both line and neutral. The neutral conductor switching function is explicitly listed, making it suitable for applications requiring full isolation of both poles."},{"question":"What compliance documentation does SENTRON provide for this breaker?","answer":"The breaker is designed and tested per EN 60898 for the 3 kA breaking capacity rating. As a Siemens SENTRON product, it carries CE marking and is manufactured under ISO 9001. Specific RoHS/REACH declarations are available from Siemens on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SQ2270-0KA02","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/5SQ2270-0KA02 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}}