{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM2647-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM2647-8","canonicalUrl":"https://aoctrl.com/siemens/5SM2647-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SM2647-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON selective RCD unit, 4-pole, 100 A AC rated, 300 mA Type A, 50/60 Hz, IP20.","salesMarkdown":"The Siemens SENTRON 5SM2647-8 is a 4-pole selective residual-current device (RCD) built for 100 A AC circuits at 50/60 Hz. The selective design (Type S) means it withstands short-duration earth faults without tripping, so only the downstream RCD clears a ground leak on a branch. That keeps the rest of the distribution board live during a fault on one circuit. Rated fault current is 300 mA Type A, covering sinusoidal AC and pulsed DC residual currents up to that threshold. Width is 5 modular units, depth 70 mm. IP20 with the distribution board enclosed. ## Derating curve — the number that actually governs your panel The 100 A rating holds only up to 40 °C. At 45 °C it's 93 A, at 50 °C it's 90 A, at 60 °C it's 85 A, and at 70 °C it's 80 A. If your panel runs warm — say 55 °C near the top of a sealed enclosure — you're limited to 87 A continuous. Plan the upstream breaker and conductor accordingly. Surge current withstand is 5 kA, surge voltage 4 kV, overvoltage category III. Insulation voltage rated 460 V. Pollution degree 2 — normal indoor environment, no conductive dust or condensation.","metaTitle":"Siemens SENTRON 5SM2647-8 RCD, 4-pole, 100 A, 300 mA, Type A","metaDescription":"Siemens SENTRON 5SM2647-8 selective RCD unit, 4-pole, 100 A AC rated, 300 mA Type A, IP20. Active production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Depth":"70 mm","Width":"124 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"No","Design Of Pole":"4 poles","Number Of Poles":"4","lifecycle_stage":"current","Fastening Method":"REG","Mounting Position":"any","at AC rated value":"100 A","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Product Variations":"for 5SP4","Degree Of Pollution":"2","Product Designation":"RCD-unit","protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage Category":"III","Design Of The Product":"Selective","Residual Current Type":"A","at 40 °C rated value":"93 A","at 45 °C rated value":"93 A","at 50 °C rated value":"90 A","at 55 °C rated value":"87 A","at 60 °C rated value":"85 A","at 65 °C rated value":"83 A","at 70 °C rated value":"80 A","OFF-delay time adjustable":"No","For Testing Equipment Minimum":"195 V","Number Of Modular Width Units":"5","Position Of Power Supply Cord":"top or bottom","Rated Fault Current Adjustable":"No","Protection Function False Tripping":"Yes","Tripping Fault Current Rated Value":"300 mA","insulation voltage (Ui) rated value":"460 V","Surge Current Resistance Rated Value":"5 kA","Surge Voltage Resistance Rated Value":"4 000 V","Value Range Of The Operating Frequency":"50/60 Hz","reference code according to IEC 81346-2":"F","Type Of Voltage Of The Operating Voltage":"AC","Value Range Of The Supply Voltage Frequency":"50 Hz","Mechanical Service Life (Operating Cycles) Typical":"10 000","for rated value of the current at AC in hot operating state per pole":"5 W"}},"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=468186&mlfb=5SM2647-8","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM2647-8/alternatives.json"},"ai":{"faq":[{"question":"What is the residual current rating and type?","answer":"Rated fault current is 300 mA, Type A — covers sinusoidal AC and pulsed DC residual currents up to that threshold. Not adjustable. Selective design (Type S) provides time delay for coordination."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM2647-8","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/5SM2647-8 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}}