{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SQ2370-0KA40","brand":"Siemens","brandSlug":"siemens","productSlug":"5SQ2370-0KA40","canonicalUrl":"https://aoctrl.com/siemens/5SQ2370-0KA40","factsUrl":"https://aoctrl.com/api/mcp/products/5SQ2370-0KA40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SQ2370-0KA40, miniature circuit breaker, 3-pole, C tripping characteristic, 40 A rated current, 3 kA breaking capacity per EN 60898 at 400 V AC, 50 Hz, IP20, 3 modular width units.","salesMarkdown":"The Siemens SENTRON 5SQ2370-0KA40 is a 3-pole miniature circuit breaker (MCB) in the 5SQ design, carrying a C tripping characteristic and rated 40 A at 400 V AC, 50 Hz. The 55 mm installation depth keeps it compatible with shallow gland plates and compact enclosures. ## DIN-rail integration note Snap-on DIN-rail mount, 3 module widths at 18 mm each. No neutral pole switching — the 3-pole unit breaks only the phase conductors, so a separate neutral bar is required in the enclosure.","metaTitle":"Siemens SENTRON 5SQ2370-0KA40 MCB, 3-pole C 40A 3kA","metaDescription":"Siemens SENTRON 5SQ2370-0KA40 miniature circuit breaker, 3-pole, C-curve, 40 A rated current, 3 kA breaking capacity per EN 60898 at 400 V AC. Current lifecycle stage. Quoted to or","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","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":"3P","Energy Limitation Class":"3","Number Of Modular Width Units":"3","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","operational current / at AC / rated value":"40 A","Product Function / Neutral Conductor Switching":"No"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$127.39","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=467888&mlfb=5SQ2370-0KA40","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SQ2370-0KA40/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SQ2370-0KA40?","answer":"The 5SQ2370-0KA40 has a 3 kA breaking capacity per EN 60898 at 400 V AC. That means it safely interrupts short-circuit faults up to 3 kA at the rated voltage."},{"question":"Where can I buy 5SQ2370-0KA40?","answer":"The 5SQ2370-0KA40 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm offer."},{"question":"What is the closest functional second-source to 5SQ2370-0KA40?","answer":"The closest functional peer within the same SENTRON 5SQ family is the 5SQ2370-2YA05 — identical 3-pole, C-curve, 3 kA, 400 V AC rating, but at 0.5 A instead of 40 A. It shares the same form factor, DIN-rail footprint, and pollution/overvoltage ratings, so it drops into the same panel without rewiring — only the current rating differs for the branch circuit being protected."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SQ2370-0KA40","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/5SQ2370-0KA40 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}}