{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM3647-0","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM3647-0","canonicalUrl":"https://aoctrl.com/siemens/5SM3647-0","factsUrl":"https://aoctrl.com/api/mcp/products/5SM3647-0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SM3 series RCCB, 4-pole, 80 A rated current, 300 mA AC type, 400 V, 10 kA short-circuit rating, DIN rail mount.","salesMarkdown":"The Siemens SENTRON 5SM3647-0 is a 4-pole residual current circuit breaker (RCCB) rated for 80 A at 40 °C ambient, tripping at 300 mA residual current, AC type, for 400 V AC 50 Hz systems. It carries a 10 kA short-circuit current rating and mounts on DIN rail (REG) — standard for panel integration in distribution boards. The 80 A rating holds at 40 °C and 45 °C without derating; at 50 °C it drops to 76.8 A, and at 70 °C to 64 A — so if the panel runs hot, the continuous load must be reduced accordingly. The 300 mA AC-type trip is instantaneous (no short-time delay), meaning it clears earth faults fast but will nuisance-trip on equipment with high-frequency leakage (VFDs, switching supplies). For those loads, an AC-type RCCB is not the right choice — you would need an A or B type.","metaTitle":"Siemens SENTRON 5SM3647-0 RCCB, 4P, 80 A, 300 mA, AC type","metaDescription":"Siemens SENTRON 5SM3647-0 4-pole RCCB, 80 A at 40 °C, 300 mA AC type, 10 kA SCCR, 400 V. Current lifecycle stage. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Depth":"77 mm","Solid":"1.5 ... 25 mm²","Width":"72 mm","Height":"90 mm","Stranded":"1.5 ... 25 mm²","at 40 Cel":"80 A","at 45 Cel":"80 A","at 50 Cel":"76.8 A","at 55 Cel":"73.6 A","at 60 Cel":"70.4 A","at 65 Cel":"67.2 A","at 70 Cel":"64 A","Rated Value":"50 Hz","Mounting type":"DIN rail (REG)","During Storage":"-40 ... +75 °C","Number of poles":"4","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Ambient temperature":"-5 ... +45 °C","Operating frequency":"50Hz","Product designation":"RCCB","Protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage category":"III","Design of the product":"Instantaneous","Number of width units":"4","Type of fault current":"AC","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","I2t-value / permissible":"70 000 A²·s","circuit-breaker / Design":"5SM3","Short-circuit current rating":"10 kA","Current / at AC / rated value":"80 A","Product feature / silicon-free":"Yes","Position / of power supply cord":"top or bottom","Protection against electrical shock":"Finger and back-of-hand safe","Supply voltage / at AC / rated value":"400 V","Switching function / short-term delayed":"No","Tripping residual current / rated value":"300 mA","Tightening torque / with screw-type terminals":"2.5 ... 3 N·m","Size of installation devices / acc. to DIN 43880":"1","Supply voltage / for testing equipment / minimum":"100 V","Mechanical service life (switching cycles) / typical":"10 000"}},"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=133491&mlfb=5SM3647-0","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM3647-0/alternatives.json"},"ai":{"faq":[{"question":"Who supplies 5SM3647-0 and how is it quoted?","answer":"The part is sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ for current pricing and availability."},{"question":"What is the closest functional second-source for 5SM3647-0?","answer":"The 5SL4363-7 is a peer within the SENTRON family but is a 4-pole MCB (miniature circuit breaker), not an RCCB — it provides overcurrent protection, not earth-fault protection. They are not drop-in substitutes; the 5SM3647-0 is the RCCB for residual current protection, while the 5SL4363-7 handles overload and short-circuit protection. For a complete panel, they often sit side by side on the same DIN rail."},{"question":"What is the depth of 5SM3647-0?","answer":"The overall depth is 77 mm, with an installation depth of 70 mm."},{"question":"What conductor sizes does 5SM3647-0 accept?","answer":"It accepts solid and stranded conductors from 1.5 mm² up to 25 mm²."},{"question":"Will 5SM3647-0 drop into a panel specified around 5SL4363-7?","answer":"Both mount on DIN rail and share the same 72 mm width per 4 width units, so the physical footprint is compatible. However, the 5SM3647-0 is an RCCB (residual current protection) while the 5SL4363-7 is an MCB (overcurrent protection) — they serve different protection functions and are not electrically interchangeable. A panel designed for an MCB cannot simply swap in an RCCB without rewiring the earth-fault detection circuit."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM3647-0","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/5SM3647-0 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}}