{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SJ6405-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SJ6405-7","canonicalUrl":"https://aoctrl.com/siemens/5SJ6405-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SJ6405-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SJ6 series, miniature circuit breaker, 4-pole, C-curve, 0.5 A, 6 kA breaking capacity, 400 V AC, 70 mm installation depth.","salesMarkdown":"The Siemens 5SJ6405-7 is a 4-pole miniature circuit breaker from the SENTRON 5SJ6 series, rated 0.5 A with a C tripping characteristic. It protects branch circuits against overloads and short circuits, with a breaking capacity of 6 kA per both EN 60898 and IEC 60947-2 — enough for most residential and light commercial distribution boards where the prospective fault current stays under that threshold. Rated 0.5 A at 400 V AC, this breaker is sized for very light loads — think control transformers, signal supplies, or small lighting circuits, not motor or general-power branches. The 6 kA breaking capacity (per EN 60898 and IEC 60947-2) is the standard domestic/commercial rating — it will clear a fault up to 6 kA without welding or rupturing. Four poles mean it switches all phases (and the neutral if wired that way) simultaneously. The 4-module width (each 18 mm, so 72 mm total) is the standard footprint for a 4-pole MCB on a DIN rail — it occupies four adjacent slots in the distribution board. Installation depth is 70 mm — that's the distance from the rail to the back of the enclosure, so the panel needs at least that much clearance behind the rail. Rated for 50 Hz supply, overvoltage category III (fixed-installation level), and sealable (provision for a lead seal or lock to prevent unauthorized switching).","metaTitle":"Siemens 5SJ6405-7 SENTRON MCB, 4-Pole C 0.5A 6kA","metaDescription":"Siemens 5SJ6405-7 SENTRON miniature circuit breaker, 4-pole, C-curve, 0.5 A, 6 kA breaking capacity per EN 60898. Current lifecycle stage. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Rated Value":"50 Hz","Halogen-Free":"Yes","Silicon-Free":"Yes","Number of poles":"4","Type of voltage":"AC/DC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","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":"0.5 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=278144&mlfb=5SJ6405-7","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SJ6405-7/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SJ6405-7?","answer":"6 kA per both EN 60898 and IEC 60947-2 at 400 V AC."},{"question":"What is the temperature range for 5SJ6405-7?","answer":"Operating ambient -40 °C to +75 °C, with periodic humidity up to 95% at +55 °C."},{"question":"Where can I buy 5SJ6405-7?","answer":"Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SJ6405-7","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/5SJ6405-7 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}}