{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SQ2270-2YA02","brand":"Siemens","brandSlug":"siemens","productSlug":"5SQ2270-2YA02","canonicalUrl":"https://aoctrl.com/siemens/5SQ2270-2YA02","factsUrl":"https://aoctrl.com/api/mcp/products/5SQ2270-2YA02","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON miniature circuit breaker, 5SQ series, 2-pole, C-curve, 2 A rated, 3 kA breaking capacity per EN 60898, 400 V AC, IP20, 2 modular width units.","salesMarkdown":"## 2-pole C-curve MCB for 400 V AC branch circuits The Siemens SENTRON 5SQ2270-2YA02 is a 2-pole miniature circuit breaker with a C tripping characteristic, rated 2 A at 30 °C and 400 V AC, with a 3 kA breaking capacity per EN 60898. The C-curve means it trips at 5 to 10 times rated current — typical for moderate inrush loads like lighting banks, small transformers, or motor control circuits where you need to ride through the start surge without nuisance trips. The 3 kA SCCR at 400 V is the fault-clearing limit per the standard; upstream coordination must respect that ceiling. ## Thermal derating — read the real rating at your panel temperature The 2 A rating is at 30 °C ambient. At 40 °C it derates to 1.85 A, at 50 °C to 1.74 A, and at 60 °C to 1.6 A. If this breaker sits in a warm enclosure — common in packed panels — the continuous load must be sized against the derated value, not the 30 °C figure. The IP20 finger-safe terminals are standard for enclosed distribution boards; not rated for wet or washdown zones. ## Panel fit — 2 MWUs, 55 mm depth Occupies 2 modular width units (about 36 mm) on a DIN rail, with an installation depth of 55 mm. The 2-pole form factor switches both phase and neutral (or two phases in a split-phase or single-phase 400 V line-to-line circuit). Pollution degree 3 and overvoltage category III suit it for fixed-installation distribution panels in industrial environments.","metaTitle":"Siemens SENTRON 5SQ2270-2YA02 MCB, 2P, C 2A, 3 kA, 400 V","metaDescription":"Siemens SENTRON 5SQ2270-2YA02 miniature circuit breaker, 2-pole, C-curve, 2 A rated at 30 °C, 3 kA breaking capacity per EN 60898, 400 V AC. Current lifecycle stage. Quoted to orde","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Design Of Pole":"2P","Number Of Poles":"2","lifecycle_stage":"current","Installation Depth":"55 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","at AC / rated value":"2 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":"2 A","at 40 °C / rated value":"1.85 A","at 45 °C / rated value":"1.79 A","at 50 °C / rated value":"1.74 A","at 55 °C / rated value":"1.67 A","at 60 °C / rated value":"1.6 A","Number Of Modular Width Units":"2","Tripping Characteristic Class":"C","according to EN 60898 / rated value":"3 kA","supply voltage / at AC / rated value":"400 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=29192&mlfb=5SQ2270-2YA02","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SQ2270-2YA02/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 5SQ2270-2YA02?","answer":"Submit an RFQ — availability and current pricing are confirmed at quote time through our independent distribution channel."},{"question":"What is the breaking capacity of 5SQ2270-2YA02?","answer":"3 kA per EN 60898 at 400 V AC. This is the maximum fault current it can safely interrupt."},{"question":"What is the design of pole for 5SQ2270-2YA02?","answer":"2-pole (2P). It switches both poles simultaneously."},{"question":"Will 5SQ2270-2YA02 drop into a panel specified for 5SQ2370-2YA04?","answer":"No — 5SQ2370-2YA04 is a 3-pole breaker (3P) with 4 A rating, while this is a 2-pole 2 A unit. The pole count and current rating differ; the panel would need rewiring and a different DIN-rail allocation."},{"question":"What compliance documentation does Siemens provide for 5SQ2270-2YA02?","answer":"The part is designed to EN 60898 for breaking capacity. Standard documentation includes a CE declaration of conformity and RoHS/REACH compliance statements available from the manufacturer."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SQ2270-2YA02","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/5SQ2270-2YA02 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}}