{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SQ2370-2YA02","brand":"Siemens","brandSlug":"siemens","productSlug":"5SQ2370-2YA02","canonicalUrl":"https://aoctrl.com/siemens/5SQ2370-2YA02","factsUrl":"https://aoctrl.com/api/mcp/products/5SQ2370-2YA02","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SQ2370-2YA02 miniature circuit breaker, 3-pole, C characteristic, 2 A, 3 kA breaking capacity at 400 V AC, IP20.","salesMarkdown":"## What it is and what it does The Siemens SENTRON 5SQ2370-2YA02 is a 3-pole miniature circuit breaker (MCB) with a C tripping characteristic, rated at 2 A at 400 V AC and a 3 kA breaking capacity per EN 60898. The C-curve means it trips at 5 to 10 times rated current — designed for moderate inrush loads like small motors, transformers, or lighting banks where a B-curve would nuisance-trip on startup. The 3 kA breaking capacity at 400 V AC covers most final subcircuits in residential and light commercial distribution boards; if your fault current exceeds that, you need an upstream current-limiting device. Accepts AC or DC supply voltage, occupies 3 width units, installation depth 55 mm, IP20. ## Panel fit and integration Snap-on DIN rail mount, 3 width units, 55 mm installation depth. No neutral conductor switching. Overvoltage category 3 and energy limiting class 3 — suitable for fixed installations downstream of the main distribution board, where transient overvoltages are already limited by upstream SPDs.","metaTitle":"Siemens SENTRON 5SQ2370-2YA02 MCB, 3-pole, C-curve, 2 A, 3 k","metaDescription":"Siemens SENTRON 5SQ2370-2YA02 miniature circuit breaker, 3-pole, C characteristic, 2 A rated current, 3 kA breaking capacity at 400 V AC. Current lifecycle stage. Sourced to order","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Number of poles":"3","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":"3","Number of poles / Note":"3P","circuit-breaker / Design":"5SQ","Current / at AC / rated value":"2 A","Tripping characteristic class":"C","acc. to EN 60898 / rated value":"3 kA","Supply voltage / at AC / rated value":"400 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=275948&mlfb=5SQ2370-2YA02","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SQ2370-2YA02/alternatives.json"},"ai":{"faq":[{"question":"Will 5SQ2370-2YA02 drop into a panel specified around 5SQ2370-2YA04 without rewiring?","answer":"Yes — both are 3-pole, C-curve, 3 kA, 400 V AC, same physical footprint (3 width units, 55 mm depth). The only difference is the current rating: 2 A vs 4 A. If the circuit load is under 2 A, it's a direct swap; if the original design called for 4 A, the 2 A will trip on the load."},{"question":"What is 5SQ2370-2YA02's listed number of poles?","answer":"3 poles (3P)."},{"question":"What is 5SQ2370-2YA02's listed type of voltage?","answer":"AC/DC — it can be used on both AC and DC circuits within its rated parameters."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SQ2370-2YA02","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/5SQ2370-2YA02 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}}