{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SJ3663-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SJ3663-7","canonicalUrl":"https://aoctrl.com/siemens/5SJ3663-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SJ3663-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SJ3 series miniature circuit breaker, 5SJ3663-7, 3P+N, 63 A, C characteristic, 4.5 kA breaking capacity at 400 V AC.","salesMarkdown":"## 63 A C-curve MCB for 400 V AC distribution The Siemens SENTRON 5SJ3663-7 is a 4-pole miniature circuit breaker (3P+N) rated at 63 A with a C tripping characteristic, breaking 4.5 kA at 400 V AC per EN 60898 and IEC 60947-2. ## Conductor termination and environmental range Sealable terminals (yes) and touch protection built in, so a panel builder can wire it and close the cover without exposed live parts. Ambient temperature range spans -40 to +75 °C (operating -20 to +45 °C), with periodic tolerance to +55 °C at 95% humidity — relevant if the panel sits near a washdown zone or in an unconditioned warehouse mezzanine. Vibration resistance tested to 50 m/s² at 25–150 Hz and 60 m/s² at 10–150 Hz per IEC 60068-2-6, so it holds up on a machine frame or in a mobile substation.","metaTitle":"Siemens 5SJ3663-7 SENTRON MCB, 63A C-Curve 4.5kA 3P+N","metaDescription":"Siemens SENTRON 5SJ3663-7 miniature circuit breaker, 63 A, C characteristic, 4.5 kA breaking capacity, 3P+N, 400 V AC, current production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Solid":"0.75 ... 25 mm²","Sealable":"Yes","Stranded":"0.75 ... 25 mm²","Rated Value":"50 Hz","Halogen-Free":"Yes","Silicon-Free":"Yes","Wertebereich":"-20 ... +45 °C","Number of poles":"4","Type of voltage":"AC/DC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Ambient temperature":"-40 ... +75 °C","Product designation":"Miniature circuit breakers","Protection class IP":"IP20, with connected conductors","Overvoltage category":"3","Design of the product":"Miniature circuit breaker 5SJ3","Energy limiting class":"3","Number of width units":"4","Number of poles / Note":"3P+N","circuit-breaker / Design":"5SJ3","Current / at AC / rated value":"63 A","Tripping characteristic class":"C","at DC / rated value / maximum":"60 V","acc. to EN 60898 / rated value":"4.5 kA","Position / of power supply cord":"Any","acc. to IEC 60947-2 / rated value":"4.5 kA","Product feature / Touch protection":"Yes","Supply voltage / at AC / rated value":"400 V","Influence of the surrounding temperature":"Periodically +55°C, max. 95% humidity","Vibration resistance / acc. to IEC 60068-2-6":"50m/s² at 25 to 150Hz and 60m/s² at 10 to 150 Hz","with multi-phase operation / at AC / maximum":"440 V","Mechanical service life (switching cycles) / typical":"20 000"}},"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=463048&mlfb=5SJ3663-7","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SJ3663-7/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the 5SJ3663-7 and get a price?","answer":"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 lead time."},{"question":"What is the solid and stranded conductor range for 5SJ3663-7?","answer":"Both solid and stranded conductors from 0.75 mm² up to 25 mm² are accepted, matching the 63 A rating without needing pin reducers."},{"question":"How does the 5SJ3663-7 compare to the 5SQ2670-2YA16?","answer":"The 5SQ2670-2YA16 is a 4-pole SENTRON 5SQ series MCB rated 16 A with a 3 kA breaking capacity and 55 mm installation depth. The 5SJ3663-7 carries 63 A, 4.5 kA, and 70 mm depth — it is a higher-current, higher-fault-rated breaker. They share the same 400 V AC voltage class and C-curve, but the 5SQ is a lighter-duty design; the 5SJ3663-7 is the correct choice for a 63 A feeder or motor branch."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SJ3663-7","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/5SJ3663-7 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}}