{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SJ3650-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SJ3650-7","canonicalUrl":"https://aoctrl.com/siemens/5SJ3650-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SJ3650-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SJ3 series, miniature circuit breaker 5SJ3650-7, 4-pole (3P+N), C-curve, 50 A rated current, 4.5 kA breaking capacity, 400 V AC.","salesMarkdown":"The Siemens 5SJ3650-7 is a SENTRON 5SJ3 miniature circuit breaker — 4-pole (3P+N), C-curve, rated 50 A at 400 V AC with a 4.5 kA breaking capacity certified to both EN 60898 and IEC 60947-2. That 4.5 kA figure is the fault-clearing limit it holds the unit on the grid through; anything beyond that and the upstream device needs to coordinate. ## Terminal and wiring The unit is sealable — a lead seal can be fitted over the terminal cover to prevent tamper after commissioning, a common requirement on utility-metered or safety-critical supplies. Ambient range is -20 to +45 °C operating, with a storage range of -40 to +75 °C. Mechanical life is 20 000 switching cycles — that is the handle mechanism, not the electrical endurance under fault, but it gives a sense of the build quality for routine isolation duty.","metaTitle":"Siemens 5SJ3650-7 SENTRON MCB, 4-Pole C-Curve 50A 4.5kA","metaDescription":"Siemens 5SJ3650-7 SENTRON miniature circuit breaker, 4-pole (3P+N), C-curve, 50A, 4.5kA breaking capacity per EN 60898/IEC 60947-2. Current lifecycle stage, sourced to order. Reque","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","During Storage":"-40 ... +75 °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":"-20 ... +45 °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":"50 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","Insulation voltage / at AC / rated value":"440 V","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=74732&mlfb=5SJ3650-7","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SJ3650-7/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of the 5SJ3650-7?","answer":"Rated breaking capacity is 4.5 kA per both EN 60898 and IEC 60947-2 at 400 V AC. That is the maximum prospective fault current the breaker can safely interrupt; verify coordination with the upstream protective device if the available fault current at the panel exceeds this figure."},{"question":"What wire sizes does the 5SJ3650-7 accept?","answer":"Terminals accept solid or stranded copper from 0.75 mm² up to 25 mm². That covers control wiring through to the main 50 A feeder conductor."},{"question":"Where can I buy the 5SJ3650-7 and get a price?","answer":"Sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commercial offer."},{"question":"Will the 5SJ3650-7 drop into a panel specified for the 5SJ6463-7 without rewiring?","answer":"Not without checking the terminal range. The 5SJ6463-7 accepts a maximum of 2.5 mm² (solid/stranded), while the 5SJ3650-7 accepts up to 25 mm² — the same physical DIN footprint (4 width units, 70 mm depth) and similar pole count, but the 5SJ6463-7 is a 63 A device with a 6 kA breaking capacity. If the existing wiring is sized for 63 A (e.g., 10 mm² or larger), the 5SJ3650-7's terminals will handle it; if the panel was wired with smaller tails for a 50 A load, the 5SJ6463-7's 2.5 mm² limit may be undersized. Verify the conductor size before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SJ3650-7","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/5SJ3650-7 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}}