{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM2643-6","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM2643-6","canonicalUrl":"https://aoctrl.com/siemens/5SM2643-6","factsUrl":"https://aoctrl.com/api/mcp/products/5SM2643-6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SM2643-6 RCD-unit, 4-pole, type A, In: 40 A, 300 mA, Un AC: 400 V, instantaneous, 50 Hz, IP20, 3 MW, active.","salesMarkdown":"The Siemens SENTRON 5SM2643-6 is a 4-pole residual current device (RCD-unit) rated 40 A, 300 mA sensitivity, type A, for 400 V AC at 50 Hz. It is an instantaneous-trip design — no adjustable delay or fault current — intended for direct fault clearing in distribution boards. The 123 mm width and 70 mm depth (3 modular width units) fit standard SENTRON panel cutouts; mounting position is unrestricted. The 400 V AC insulation voltage (Ui) and 4000 V surge withstand (overvoltage category III) qualify it for main distribution panels in commercial and industrial installations, pollution degree 2 environment. The unit mounts via the standard REG fastening method — snap-on to DIN rail in any orientation. IP20 protection applies only when the distribution board is installed with connected conductors; the enclosure must provide the environmental seal.","metaTitle":"Siemens 5SM2643-6 SENTRON RCD Unit, 4-Pole, 40 A, 300 mA, 40","metaDescription":"Siemens SENTRON 5SM2643-6 RCD unit, 4-pole, type A, 40 A, 300 mA, 400 V AC. Active lifecycle. Sourced to order. Request quote for pricing and availability.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Depth":"70 mm","Width":"123 mm","Height":"90 mm","Maximum":"45 °C","Minimum":"-25 °C","Sealable":"No","Number Of Poles":"4","lifecycle_stage":"current","Fastening Method":"REG","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"2","Maximum Permissible":"75 °C","Minimum Permissible":"-40 °C","Product Designation":"RCD-unit","protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage Category":"III","Design Of The Product":"instantaneous","OFF-delay time adjustable":"No","Number Of Modular Width Units":"3","Rated Fault Current Adjustable":"No","Protection Function False Tripping":"Yes","insulation voltage (Ui) rated value":"460 V","Surge Voltage Resistance Rated Value":"4 000 V","Value Range Of The Operating Frequency":"50 Hz","Value Range Of The Supply Voltage Frequency":"50 Hz","Supply Voltage For Testing Equipment Minimum":"195 V","Mechanical Service Life (Operating Cycles) Typical":"10 000","for rated value of the current at AC in hot operating state per pole":"1.9 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/d8f9a16fc6c43f2ad1acbc1b60801b6d.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=735&mlfb=5SM2643-6","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM2643-6/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of 5SM2643-6?","answer":"The 5SM2643-6 has a depth of 70 mm, with an installation depth of 70 mm. Width is 123 mm, height is 90 mm."},{"question":"Where can I buy 5SM2643-6 and get current pricing?","answer":"The 5SM2643-6 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 commercial response."},{"question":"Will 5SM2643-6 drop into a panel specified around 5SL4363-7?","answer":"No — the 5SM2643-6 is an RCD unit (4-pole, 123 mm wide, 70 mm deep), while the 5SL4363-7 is a miniature circuit breaker (3-pole, 54 mm wide, 76 mm deep). Different function, different footprint; they are not form-fit interchangeable without rewiring and panel cutout changes."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM2643-6","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/5SM2643-6 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}}