{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SQ2170-0KA03","brand":"Siemens","brandSlug":"siemens","productSlug":"5SQ2170-0KA03","canonicalUrl":"https://aoctrl.com/siemens/5SQ2170-0KA03","factsUrl":"https://aoctrl.com/api/mcp/products/5SQ2170-0KA03","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SQ2170-0KA03, miniature circuit breaker, 1-pole, C-tripping characteristic, rated current 3 A, breaking capacity 3 kA acc. to EN 60898, rated voltage 240 V AC, 50 Hz, IP20, installation depth 55 mm.","salesMarkdown":"## SENTRON T55 1-pole MCB, C-curve, 3 A The Siemens 5SQ2170-0KA03 is a single-pole miniature circuit breaker from the SENTRON T55 series, rated 3 A with a C tripping characteristic. It breaks fault currents up to 3 kA per EN 60898 at 240 V AC, 50 Hz — the standard for final-subcircuit protection in commercial and light-industrial panels where the supply transformer impedance keeps prospective fault current below that level. The C-curve means the magnetic trip fires at 5 to 10 times rated current (15–30 A), so it handles the inrush of motor starters, contactor coils, and small transformers without nuisance tripping while still clearing a hard short. For resistive loads or long cable runs where inrush is lower, a B-curve sibling would trip faster; for high-inrush loads like welders, a D-curve would be a better fit. This one splits the difference for general mixed loads.","metaTitle":"Siemens 5SQ2170-0KA03 SENTRON MCB, 1P, C, 3 A, 3 kA","metaDescription":"Siemens SENTRON 5SQ2170-0KA03 miniature circuit breaker, 1-pole, C-curve, 3 A, 3 kA breaking capacity per EN 60898, 240 V AC. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Number of poles":"1","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":"1","Number of poles / Note":"1P","circuit-breaker / Design":"5SQ","Current / at AC / rated value":"3 A","Tripping characteristic class":"C","acc. to EN 60898 / rated value":"3 kA","Supply voltage / at AC / rated value":"240 V","Supply voltage frequency / rated value":"50 Hz","Product function / neutral conductor switching":"No"}},"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=19443&mlfb=5SQ2170-0KA03","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SQ2170-0KA03/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of the 5SQ2170-0KA03?","answer":"3 kA rated short-circuit capacity per EN 60898 at 240 V AC, 50 Hz. That is the standard domestic/commercial fault level; for industrial panels with higher prospective fault current you would step up to a 10 kA or 15 kA rated MCB."},{"question":"Where can I buy the 5SQ2170-0KA03 and get a price?","answer":"This part is sourced to order against an RFQ through independent distribution. Submit a request for current pricing and availability — confirmed at quote time, no stock count or price figure published here."},{"question":"Will the 5SQ2170-0KA03 drop into a panel built for the 5SQ2170-2YA15?","answer":"Yes — same 1-pole footprint, same 55 mm depth, same C-curve, same 3 kA breaking capacity. The only difference is the 5SQ2170-2YA15 is rated 1.6 A while this one is 3 A. It physically fits the same DIN-rail slot without rewiring, but verify the load current matches the new 3 A rating before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SQ2170-0KA03","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/5SQ2170-0KA03 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}}