{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SJ6404-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SJ6404-7","canonicalUrl":"https://aoctrl.com/siemens/5SJ6404-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SJ6404-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SJ6 miniature circuit breaker, 4-pole, C-curve, 4 A rated, 6 kA breaking capacity at 400 V AC, 70 mm installation depth.","salesMarkdown":"It carries a 6 kA breaking capacity per both EN 60898 and IEC 60947-2 at 400 V AC, which means it can safely interrupt fault currents up to that level on a 400 V three-phase supply — standard for lighting, distribution, and motor branch circuits in commercial and light industrial panels. The 4 A C-curve is the key selection parameter: C-curve trips between 5 and 10 times rated current (20–40 A magnetic trip), making it suitable for moderate inrush loads like small motor starters, contactor coils, and lighting banks — not for high-inrush transformers or pure resistive loads (those would take B or D curves respectively). The 440 V rated insulation voltage and overvoltage category 3 confirm it's rated for fixed-installation distribution boards, not final sub-circuits with lower fault levels. Wire range is 0.75 to 25 mm² solid or stranded, which covers everything from 1.5 mm² lighting circuits up to 6 mm² feeder tails. Ambient temperature range is -20 to +45 °C, with periodic excursions to +55 °C at 95% humidity. That's the thermal derating boundary: at sustained +45 °C the breaker still carries its full 4 A without nuisance tripping; above that, apply the manufacturer's derating curve. ## Deployment context Snap-on mounting to DIN rail (any position,), occupying 4 width units at 17.5 mm each — 70 mm of panel width. The 4-pole configuration covers three-phase plus neutral switching, which is typical for three-phase distribution boards in commercial buildings, small industrial control panels, and HVAC equipment.","metaTitle":"Siemens 5SJ6404-7 SENTRON MCB, 4-Pole C 4A 6kA 400V","metaDescription":"Siemens 5SJ6404-7 SENTRON miniature circuit breaker, 4-pole, C-curve, 4 A, 6 kA breaking capacity per EN 60898/IEC 60947-2, 400 V AC. Current lifecycle stage. Quoted 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","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 5SJ6","Energy limiting class":"3","Number of width units":"4","Number of poles / Note":"4","circuit-breaker / Design":"5SJ6","Current / at AC / rated value":"4 A","Tripping characteristic class":"C","at DC / rated value / maximum":"60 V","acc. to EN 60898 / rated value":"6 kA","Position / of power supply cord":"Any","acc. to IEC 60947-2 / rated value":"6 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=404739&mlfb=5SJ6404-7","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SJ6404-7/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SJ6404-7 and how do I get a price?","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 lead time."},{"question":"Will 5SJ6404-7 drop into a panel specified around 5SJ6463-7 without rewiring?","answer":"Yes — both share the same 4-pole, 70 mm depth, DIN-rail footprint, and terminal wire range (0.75–25 mm²). The only difference is the current rating: 5SJ6404-7 is 4 A C-curve; 5SJ6463-7 is 63 A C-curve. If the panel's branch circuit is sized for 4 A, the swap is mechanical and electrical drop-in."},{"question":"What compliance documentation does Siemens provide for 5SJ6404-7?","answer":"The part carries EN 60898 and IEC 60947-2 certification for breaking capacity, and is halogen-free and silicon-free. Standard Siemens documentation includes a declaration of conformity covering the Low Voltage Directive and applicable harmonized standards — request the specific doc pack with your RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SJ6404-7","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/5SJ6404-7 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}}