{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SQ2370-2YA08","brand":"Siemens","brandSlug":"siemens","productSlug":"5SQ2370-2YA08","canonicalUrl":"https://aoctrl.com/siemens/5SQ2370-2YA08","factsUrl":"https://aoctrl.com/api/mcp/products/5SQ2370-2YA08","rawCanonicalId":null},"summary":{"shortDescription":"SENTRON 5SQ2370-2YA08 miniature circuit breaker, 3-pole, C-curve, 8 A, 400 V AC, 3 kA breaking capacity per EN 60898, IP20, 55 mm depth.","salesMarkdown":"## SENTRON 5SQ2370-2YA08 — 3-pole C-curve MCB, 8 A, 400 V AC Its 3 kA breaking capacity is certified per EN 60898, the standard for overcurrent protection in residential and commercial final circuits. The C-curve (5–10× In) makes it suitable for moderate inrush loads such as small motors, lighting banks, and transformer-fed circuits — not for purely resistive loads where a B-curve would suffice, nor for high-inrush industrial drives that need a D-curve. ## Drop-in fit vs. sibling ratings The 5SQ2370-2YA08 shares the same physical footprint (3-pole, 55 mm depth, 3 width units) and breaking capacity (3 kA at 400 V AC) as the 5SQ2370-2YA04 (4 A) and 5SQ2370-2YA01 (1 A). The only difference is the rated current. If a panel was specified around a 4 A or 1 A sibling, the 8 A unit drops into the same DIN-rail slot without rewiring — but verify the downstream conductor sizing and load protection coordination, since the higher rating may exceed the cable's ampacity or the device's withstand. No neutral conductor switching — this is a line-side only device.","metaTitle":"SENTRON 5SQ2370-2YA08 Miniature Circuit Breaker, 3-Pole, C 8","metaDescription":"SENTRON 5SQ2370-2YA08 miniature circuit breaker, 3-pole, C-curve 8 A, 400 V AC, 3 kA breaking capacity per EN 60898. Current lifecycle stage. Quoted to order against RFQ.","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":"8 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=358088&mlfb=5SQ2370-2YA08","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SQ2370-2YA08/alternatives.json"},"ai":{"faq":[{"question":"Will 5SQ2370-2YA08 drop into a panel specified around 5SQ2370-2YA04?","answer":"Yes, the physical footprint is identical — both are 3-pole, 55 mm deep, 3 width units, with the same 3 kA breaking capacity at 400 V AC. The only difference is the 8 A rating vs. 4 A. No rewiring needed for the DIN-rail slot, but check downstream cable sizing and load coordination."},{"question":"Where can I buy 5SQ2370-2YA08 and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock count or price is listed here."},{"question":"What is the number of poles and voltage type for 5SQ2370-2YA08?","answer":"It is a 3-pole device rated for AC/DC supply voltage, with a rated AC voltage of 400 V at 50 Hz."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SQ2370-2YA08","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/5SQ2370-2YA08 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}}