{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SQ2370-2YA16","brand":"Siemens","brandSlug":"siemens","productSlug":"5SQ2370-2YA16","canonicalUrl":"https://aoctrl.com/siemens/5SQ2370-2YA16","factsUrl":"https://aoctrl.com/api/mcp/products/5SQ2370-2YA16","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SQ2370-2YA16 miniature circuit breaker, 3-pole, C-curve 16 A, 3 kA breaking capacity at 400 V AC per EN 60898, 55 mm installation depth.","salesMarkdown":"## What it is and what it does The Siemens SENTRON 5SQ2370-2YA16 is a 3-pole miniature circuit breaker (MCB) with C-curve tripping characteristic, rated 16 A at 400 V AC. It is built to EN 60898 with a 3 kA breaking capacity, making it suitable for branch-circuit protection in commercial and light-industrial panels where the prospective short-circuit current stays under that threshold. ## What the ratings mean for fit The C-curve means the breaker trips at 5 to 10 times rated current — a common choice for motor circuits, transformers, and lighting banks with moderate inrush. At 16 A it protects a 3-phase load drawing roughly 11 kW at 400 V. The 3 kA breaking capacity is the maximum fault current it can safely interrupt per EN 60898; if your panel's available fault current exceeds that, you need a higher-rated MCB or a current-limiting upstream device. Thermal derating is built in: at 40 °C ambient the continuous rating drops to 15.2 A, at 50 °C to 14.4 A, and at 60 °C to 13.6 A (–). If the breaker lives in a hot enclosure (stacked with other heat sources), size the load to the derated value, not the 30 °C nameplate. ## Installation and panel fit It occupies 3 modular width units on a DIN rail, with a shallow 55 mm installation depth — useful for tight enclosures where the standard 70–76 mm depth of many SENTRON MCBs won't clear the gland plate or door. Pollution degree 3 and overvoltage category III mean it's rated for fixed installations in industrial environments where transient overvoltages are expected. IP20 provides finger-safe terminal protection once the busbar and wiring are in place.","metaTitle":"Siemens 5SQ2370-2YA16 SENTRON MCB, 3-pole, C 16 A, 3 kA","metaDescription":"Siemens SENTRON 5SQ2370-2YA16 miniature circuit breaker, 3-pole, C-curve 16 A, 3 kA breaking capacity per EN 60898, 400 V AC. Current production. Sourced 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","lifecycle_stage":"current","Installation Depth":"55 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","at AC / rated value":"16 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":"16 A","at 40 °C / rated value":"15.2 A","at 45 °C / rated value":"14.8 A","at 50 °C / rated value":"14.4 A","at 55 °C / rated value":"14 A","at 60 °C / rated value":"13.6 A","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","Type Of Voltage / Of The Operating Voltage":"AC/DC","Product Component / 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=228690&mlfb=5SQ2370-2YA16","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SQ2370-2YA16/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SQ2370-2YA16?","answer":"It has a 3 kA breaking capacity per EN 60898 at 400 V AC. That is the maximum fault current it can safely clear; verify your panel's prospective short-circuit current stays below this level."},{"question":"What is the difference between 5SQ2370-2YA16 and the 5SL4363-7?","answer":"Both are 3-pole C-curve MCBs, but the 5SL4363-7 carries a 10 kA breaking capacity per EN 60898 and IEC 60947-2 (versus 3 kA on the 5SQ2370-2YA16), and has a 76 mm depth versus 55 mm. The 5SL4363-7 also supports supplementary devices and has 10,000 operating cycles. Choose the 5SQ2370-2YA16 when panel depth is constrained and fault current is under 3 kA; the 5SL4363-7 fits higher-fault applications or where a spare auxiliary contact may be needed later."},{"question":"Will 5SQ2370-2YA16 drop into a panel specified around 5SL6016-7KL?","answer":"Not without rewiring. The 5SL6016-7KL is a 2-pole (1P+N) MCB with neutral switching, occupying 1 modular width and 70 mm depth, rated 230 V AC. The 5SQ2370-2YA16 is a 3-pole breaker (3 modular widths, 55 mm depth) at 400 V AC. The footprint, voltage, and pole configuration differ completely."},{"question":"Where can I buy 5SQ2370-2YA16?","answer":"This part 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 price and ETA."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SQ2370-2YA16","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/5SQ2370-2YA16 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}}