{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SJ6406-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SJ6406-7","canonicalUrl":"https://aoctrl.com/siemens/5SJ6406-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SJ6406-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SJ6 series, miniature circuit breaker 5SJ6406-7, 4-pole, C-curve, 6 A, 6 kA per EN 60898 / IEC 60947-2, 400 V AC, IP20, sealable.","salesMarkdown":"## What this 4-pole MCB does in the panel The Siemens SENTRON 5SJ6406-7 is a 4-pole miniature circuit breaker rated 6 A with a C tripping characteristic, meaning it's the go-to for moderate inrush loads like small motor starters, contactor coils, and banks of lighting — the C-curve holds past the short spike then trips fast on a hard fault. Breaking capacity sits at 6 kA per both EN 60898 and IEC 60947-2, so it's fine for residential and light commercial sub-distribution where the prospective fault current stays under that mark. At 400 V AC it covers three-phase line-to-line circuits; the 4-pole layout means it switches all three phases plus neutral in one compact 70 mm deep package that snaps onto DIN rail. ## Terminal range and sealable cover — what that means on the route Solid and stranded conductors from 0.75 mm² up to 25 mm² fit the terminals, which covers everything from control-circuit tails up to main feeder cable for a small sub-panel. The sealable feature (Yes on the nameplate) means the toggle cover accepts a lead seal or a lockout tag — out here in the grease that's what keeps the night-shift operator from resetting a breaker before you've cleared the fault. IP20 with connected conductors is standard for enclosed panels; no special washdown gaskets, so keep this one behind a gland plate.","metaTitle":"Siemens SENTRON 5SJ6406-7 MCB, 4-Pole C 6A 6kA, 400V","metaDescription":"Siemens SENTRON 5SJ6406-7 miniature circuit breaker, 4-pole, C-curve, 6 A, 6 kA breaking capacity per IEC/EN, 400 V AC. IP20. Sealable. 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","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":"6 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=28878&mlfb=5SJ6406-7","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SJ6406-7/alternatives.json"},"ai":{"faq":[{"question":"What wire sizes does the 5SJ6406-7 accept?","answer":"Solid and stranded conductors from 0.75 mm² up to 25 mm² fit the terminals. That range covers small signal wiring up to main feeder cable for a light sub-panel."},{"question":"Where can I buy the 5SJ6406-7?","answer":"We source the 5SJ6406-7 to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — send your quantity and target date for a firm line."},{"question":"What does the sealable feature mean on this MCB?","answer":"The sealable (Yes) designation means the breaker's toggle cover accepts a lead seal or lockout tag, allowing the circuit to be locked in the off position for safety lockout/tagout procedures."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SJ6406-7","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/5SJ6406-7 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}}