{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SQ2170-2YA25","brand":"Siemens","brandSlug":"siemens","productSlug":"5SQ2170-2YA25","canonicalUrl":"https://aoctrl.com/siemens/5SQ2170-2YA25","factsUrl":"https://aoctrl.com/api/mcp/products/5SQ2170-2YA25","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SQ2170-2YA25, 1-pole miniature circuit breaker, C-curve 25 A, 3 kA breaking capacity per EN 60898, 240 V AC, 55 mm depth, IP20.","salesMarkdown":"The Siemens SENTRON 5SQ2170-2YA25 is a 1-pole miniature circuit breaker (MCB) with a C-curve trip characteristic rated at 25 A. It provides a 3 kA breaking capacity per EN 60898 at 240 V AC, making it suitable for protecting lighting, socket-outlet, and general-purpose branch circuits in residential and light commercial distribution boards. The 1-module-width (1 MW) footprint and 55 mm installation depth mean it snaps directly onto a standard DIN rail in a consumer unit or sub-distribution panel — no extra space needed for the neutral pole since this is a single-pole device. The C-curve trips between 5 and 10 times rated current — so a 25 A C-curve holds through motor inrush up to about 250 A but clears a hard short fast. The 3 kA breaking capacity per EN 60898 means it safely interrupts a fault current up to 3 kA at 240 V AC; if your prospective short-circuit current at the panel exceeds that, you need an upstream current-limiting device or a higher-rated MCB. The 25 A rating at 30 °C derates to 20 A at 60 °C — so if the breaker lives in a hot enclosure (e.g., next to a transformer or in a sun-exposed panel), size the load accordingly. Single-module width on a DIN rail. The 55 mm depth is shallower than the older 5SJ3 series (70 mm) — so if you're retrofitting into a panel originally built for 5SJ3140-7, the 5SQ2170-2YA25 leaves an extra 15 mm behind the breaker for wiring or busbar clearance. Pollution degree 3 and overvoltage category 3 mean it's rated for the typical industrial environment inside a distribution board — conductive dust and transient overvoltages up to 4 kV are within spec. No neutral switching on this 1P variant; the neutral bar passes through separately.","metaTitle":"Siemens SENTRON 5SQ2170-2YA25 MCB, 1P C-curve 25A, 3kA","metaDescription":"Siemens SENTRON 5SQ2170-2YA25 miniature circuit breaker, 1-pole, C-curve 25A, 3kA breaking capacity per EN 60898, 240V AC. Current lifecycle. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Design Of Pole":"1P","Number Of Poles":"1","lifecycle_stage":"current","Installation Depth":"55 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","at AC / rated value":"25 A","protection class IP":"IP20","Overvoltage Category":"3","Design Of The Product":"Miniature circuit breaker 5SQ","Energy Limitation Class":"3","at 30 °C / rated value":"25 A","at 40 °C / rated value":"23.13 A","at 45 °C / rated value":"22.38 A","at 50 °C / rated value":"21.75 A","at 55 °C / rated value":"20.88 A","at 60 °C / rated value":"20 A","Number Of Modular Width Units":"1","Tripping Characteristic Class":"C","according to EN 60898 / rated value":"3 kA","supply voltage / at AC / rated value":"240 V","Type Of Voltage / Of The Operating Voltage":"AC/DC"}},"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=389213&mlfb=5SQ2170-2YA25","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SQ2170-2YA25/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 5SQ2170-2YA25?","answer":"Submit an RFQ through this listing. Availability and current pricing are confirmed at quote time through independent distribution — no minimum order quantity applies."},{"question":"Will 5SQ2170-2YA25 drop into a panel specified around 5SJ3140-7 without rewiring?","answer":"Generally yes — both are 1-pole C-curve MCBs on a DIN-rail footprint, but the 5SQ2170-2YA25 is 15 mm shallower (55 mm vs 70 mm). The busbar connection and terminal spacing are compatible, but verify the busbar finger length if your panel uses a pre-formed busbar system designed for the deeper 5SJ3 profile."},{"question":"What is 5SQ2170-2YA25's listed design of pole (1P) and number of poles?","answer":"The design of pole is 1P and the number of poles is 1 — a single-pole breaker switching only the phase conductor. The neutral is not switched and passes through the neutral bar separately."},{"question":"What compliance documentation does this brand provide for 5SQ2170-2YA25?","answer":"The breaker is rated per EN 60898 for breaking capacity. As a Siemens SENTRON product, it carries CE marking for the European market. Specific RoHS/REACH declarations and UL recognition (if applicable) should be confirmed from the manufacturer's documentation — the evidence on this listing does not include those certs."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SQ2170-2YA25","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/5SQ2170-2YA25 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}}