{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SQ2170-2YA04","brand":"Siemens","brandSlug":"siemens","productSlug":"5SQ2170-2YA04","canonicalUrl":"https://aoctrl.com/siemens/5SQ2170-2YA04","factsUrl":"https://aoctrl.com/api/mcp/products/5SQ2170-2YA04","rawCanonicalId":null},"summary":{"shortDescription":"SENTRON 5SQ2170-2YA04 miniature circuit breaker, 1-pole, C-curve, 4 A rated current, 3 kA breaking capacity per EN 60898, AC/DC rated voltage, 55 mm depth, IP20 finger-safe terminals.","salesMarkdown":"The SENTRON 5SQ2170-2YA04 is a miniature circuit breaker (MCB) from the 5SQ series, designed for branch-circuit overcurrent protection in distribution boards and control panels. Single-pole (1P) construction with a C-curve trip characteristic — the standard choice for moderate inrush loads like small motors, transformers, and lighting banks where the start-up surge exceeds a B-curve's tolerance but doesn't need a D-curve's headroom. Rated 4 A at 240 V AC, 50 Hz, with a 3 kA breaking capacity certified to EN 60898. That 3 kA figure governs its fault-clearing ability at the panelboard's service entrance or subfeed — adequate for residential and light commercial final circuits where the prospective short-circuit current stays under that threshold. The AC/DC voltage rating means it can also switch DC loads up to the same voltage class, though the DC breaking capacity follows a different derating curve; confirm the DC application against the manufacturer's data. Snaps onto a standard DIN rail, occupying one modular width unit. Installation depth is 55 mm. ## Panel Fit & Integration Degree of pollution 3 and overvoltage category III suit it for fixed installations inside an enclosure where conductive contamination is controlled — typical for commercial distribution boards and industrial control panels. The energy limitation class 3 indicates the breaker limits let-through energy during a fault, aiding downstream coordination. No neutral-conductor switching — this is a straight single-pole line-side breaker. For applications requiring switched neutral, pair it with a separate switched-neutral terminal block.","metaTitle":"SENTRON 5SQ2170-2YA04 Miniature Circuit Breaker, 1P C 4A 3kA","metaDescription":"SENTRON 5SQ2170-2YA04 miniature circuit breaker, 1-pole, C-curve, 4 A, 3 kA breaking capacity per EN 60898. Current production. Quoted to order against RFQ.","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","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","protection class IP":"IP20","Overvoltage Category":"3","Design Of The Product":"Miniature circuit breaker 5SQ","Number Of Poles / Note":"1P","Energy Limitation Class":"3","Number Of Modular Width Units":"1","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","operational current / at AC / rated value":"4 A","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=399558&mlfb=5SQ2170-2YA04","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SQ2170-2YA04/alternatives.json"},"ai":{"faq":[{"question":"What is 5SQ2170-2YA04's number of poles?","answer":"Single-pole (1P) construction. It protects one phase conductor and does not switch the neutral."},{"question":"What type of voltage does 5SQ2170-2YA04 accept?","answer":"Rated for both AC and DC operation. The AC rating is 240 V at 50 Hz; confirm DC voltage and breaking capacity against manufacturer data for DC applications."},{"question":"How does 5SQ2170-2YA04 compare to the 5SY4140-7?","answer":"The 5SY4140-7 is a later-generation SENTRON MCB with a higher 10 kA breaking capacity (EN 60898), deeper 70 mm installation depth, and broader operating temperature range (-40 to +75 °C). The 5SQ2170-2YA04 has a shallower 55 mm depth and a 3 kA rating — it fits where panel space is tight and fault current is low, but the 5SY4140-7 offers more fault-clearing headroom and environmental tolerance."},{"question":"Will 5SQ2170-2YA04 drop into a panel specified for 5SY4140-7?","answer":"Both share the same 1-module DIN-rail footprint and single-pole form factor, so mechanical fit is identical. However, the 5SQ2170-2YA04 is 55 mm deep versus 70 mm for the 5SY4140-7 — it will fit, but the shallower depth may leave a gap behind the DIN rail if the panel was designed for the deeper breaker. The electrical difference is the 3 kA vs 10 kA breaking capacity; verify the available fault current at the panel before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SQ2170-2YA04","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/5SQ2170-2YA04 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}}