{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SQ2170-0KA08","brand":"Siemens","brandSlug":"siemens","productSlug":"5SQ2170-0KA08","canonicalUrl":"https://aoctrl.com/siemens/5SQ2170-0KA08","factsUrl":"https://aoctrl.com/api/mcp/products/5SQ2170-0KA08","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SQ2170-0KA08 miniature circuit breaker, 1-pole, C-curve, 8 A, 3 kA breaking capacity per EN 60898 and IEC 60947-2, 240 V AC, 50 Hz, IP20, 55 mm depth.","salesMarkdown":"## Siemens SENTRON 5SQ2170-0KA08 — 1-pole C-curve MCB at 8 A The Siemens SENTRON 5SQ2170-0KA08 is a 1-pole miniature circuit breaker with a C tripping characteristic, rated 8 A at 240 V AC, 50 Hz. Its 3 kA breaking capacity is certified per both EN 60898 and IEC 60947-2 — that means it's tested to safely interrupt fault currents up to 3 kA under the respective standard's conditions. The C-curve (5–10× In) is the standard choice for general-purpose branch circuits feeding inductive loads like contactor coils, small motors, or lighting ballasts where the inrush isn't extreme but exceeds a B-curve's threshold. ## Panel fit and integration Occupying a single modular width unit with an installation depth of 55 mm, this breaker snaps onto standard DIN rail. ## What the ratings mean for your panel The 3 kA breaking capacity is the key coordination number. In a panel where the prospective short-circuit current is under 3 kA, this MCB clears a fault without upstream devices needing to trip.","metaTitle":"Siemens 5SQ2170-0KA08 SENTRON MCB, 1P C 8A 3kA","metaDescription":"Siemens SENTRON 5SQ2170-0KA08 miniature circuit breaker, 1-pole, C-curve, 8 A, 3 kA per EN 60898/IEC 60947-2, 240 V AC, 50 Hz. Current 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":"8 A","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":"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=518236&mlfb=5SQ2170-0KA08","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SQ2170-0KA08/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional alternative to the 5SQ2170-0KA08?","answer":"The closest functional peer within the SENTRON family is the 5SY4140-7, also a 1-pole C-curve MCB. The 5SY4140-7 offers a higher breaking capacity (10 kA per EN 60898, 15 kA per IEC 60947-2) and a wider operating voltage range (400 V AC single-phase, 440 V multi-phase), but it has a deeper installation depth of 70 mm versus 55 mm. If your panel has the depth clearance and you need the extra fault-current headroom, the 5SY4140-7 is a drop-in replacement on the same DIN rail footprint. If your PSCC is under 3 kA and depth is tight, the 5SQ2170-0KA08 is the correct fit."},{"question":"What is the number of poles on the 5SQ2170-0KA08?","answer":"It is a 1-pole (1P) device, switching only the line conductor — neutral is not switched or protected."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SQ2170-0KA08","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/5SQ2170-0KA08 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}}