{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SP9340-7KC47","brand":"Siemens","brandSlug":"siemens","productSlug":"5SP9340-7KC47","canonicalUrl":"https://aoctrl.com/siemens/5SP9340-7KC47","factsUrl":"https://aoctrl.com/api/mcp/products/5SP9340-7KC47","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SP9 series, 5SP9340-7KC47, 3-pole miniature circuit breaker, C-curve, 40A rated current, 50kA breaking capacity at 400V AC per IEC 60947-2, 0.75-50mm² solid/stranded terminals.","salesMarkdown":"Siemens SENTRON 5SP9340-7KC47 is a 3-pole miniature circuit breaker rated 40A with C-curve tripping characteristic, designed for 400V AC at 50 Hz. Terminals accept solid and stranded conductors from 0.75 to 50 mm² (AWG 14 to 2), with tunnel terminals at both top and bottom. That cross-section range covers everything from control wiring to main feeder taps — no need for reducers or pigtails on a 40A circuit. Mounts on standard DIN rail (35mm) or screw fixing, any orientation, with a 92 mm installation depth. The 4.5 width units (about 81 mm) mean it occupies a bit more rail than a typical 3-pole MCB — check your enclosure's gutter space before committing the panel layout. Approvals include IEC 60947-2 certification for the 50 kA rating. The part is halogen-free and silicon-free, which simplifies compliance documentation for RoHS and REACH declarations. ## Integration Notes Tightening torque for screw terminals: 2.5 to 3.5 N·m (22 to 31 lbf·in). Use a torque screwdriver — under-torquing risks thermal rise at 40A continuous; over-torquing can strip the tunnel clamp. Ambient operating range -25 to +45 °C, storage -40 to +75 °C. The 95% humidity tolerance at +55 °C (periodic) matters for non-climate-controlled panels in washdown areas or tropical installs. Shock resistance 150 m/s² at 11 ms half-sine per IEC 60068-2-27; vibration 50 m/s² at 25-150 Hz and 60 m/s² at 35 Hz (4 sec) per IEC 60068-2-6. Mechanical service life rated 20,000 switching cycles typical. For frequent switching applications (e.g., motor start-stop), that's adequate for years of service; for daily load-break duty, consider a contactor downstream to preserve the MCB's mechanical endurance.","metaTitle":"5SP9340-7KC47 SENTRON MCB 3P C 40A 50kA 400V","metaDescription":"Siemens SENTRON 5SP9340-7KC47 miniature circuit breaker, 3-pole, C-curve, 40A rated, 50kA breaking capacity at 400V AC per IEC 60947-2. Available to order; RFQ for current pricing.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Solid":"0.75 ... 50 mm²","Sealable":"Yes","Stranded":"0.75 ... 50 mm²","Halogen-Free":"Yes","Silicon-Free":"Yes","Mounting type":"Standard mounting rail and screw fixing","During Storage":"-40 ... +75 °C","Number of poles":"3","Type of voltage":"AC/DC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"92 mm","Product brand name":"SENTRON","Ambient temperature":"-25 ... +45 °C","Product designation":"Miniature circuit breaker","Protection class IP":"IP20, with connected conductors","at AC / rated value":"440 V","Overvoltage category":"3","Tunnel terminals top":"Yes","Design of the product":"5SP Miniature circuit breakers","Number of width units":"4.5","Number of poles / Note":"3P","Tunnel terminals bottom":"Yes","circuit-breaker / Design":"5SP9","Current / at AC / rated value":"40 A","Tripping characteristic class":"C","Position / of power supply cord":"Any","acc. to IEC 60947-2 / rated value":"50 kA","Product feature / Touch protection":"Yes","Supply voltage / at AC / rated value":"400 V","Supply voltage frequency / rated value":"50 Hz","Influence of the surrounding temperature":"Periodically +55°C, max. 95% humidity","Shock resistance / acc. to IEC 60068-2-27":"150m/s² at 11ms half-sine","Vibration resistance / acc. to IEC 60068-2-6":"50m/s² at 25 to 150Hz and 60m/s² at 35Hz (4sec)","Tightening torque / with screw-type terminals":"2.5 ... 3.5 N·m","Mechanical service life (switching cycles) / typical":"20 000","Tightening torque [lbf·in] / with screw-type terminals":"22 ... 31 lbf·in","AWG number / as coded connectable conductor cross section":"14 ... 2"}},"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=67926&mlfb=5SP9340-7KC47","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SP9340-7KC47/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source for 5SP9340-7KC47?","answer":"The 5SJ6463-7 is a common peer in Siemens' MCB lineup, but it is a different series with potentially different breaking capacity and terminal specs. The 5SP9340-7KC47 is a 5SP9 series device rated 50 kA per IEC 60947-2; verify the 5SJ series rating before substituting — they are not drop-in equals without panel recertification."},{"question":"What conductor sizes does 5SP9340-7KC47 accept?","answer":"Solid and stranded conductors from 0.75 to 50 mm², AWG 14 to 2. Tunnel terminals at both top and bottom accept the full range."},{"question":"Where can I buy 5SP9340-7KC47?","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 offer."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SP9340-7KC47","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/5SP9340-7KC47 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}}