{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM3646-0KL","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM3646-0KL","canonicalUrl":"https://aoctrl.com/siemens/5SM3646-0KL","factsUrl":"https://aoctrl.com/api/mcp/products/5SM3646-0KL","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SM3 series, 5SM3646-0KL, 4-pole RCCB, type AC, In: 63 A, IΔn: 300 mA, Un AC: 400 V, 10 kA, instantaneous, DIN rail mount.","salesMarkdown":"It is rated 63 A at 400 V AC with a 300 mA residual trip threshold and a 10 kA short-circuit current rating — sized for main incoming protection or sub-distribution in a 50 Hz TN or TT system. The 63 A continuous rating and 300 mA trip mean this RCCB handles a full 3-phase + N load up to that current before the residual-current element opens the circuit on ground faults above 300 mA. Instantaneous design means no intentional time delay; it trips within a cycle on fault. Conductor range accepts 1.5 to 25 mm² solid or stranded — covers standard building-wire sizes from 14 AWG through 4 AWG. Terminal torque spec is 2.5 to 3 N·m. IP20 with conductors connected — panelboard installation only, not wet locations.","metaTitle":"Siemens 5SM3646-0KL SENTRON RCCB, 4P, 63A, 300mA, 400V AC","metaDescription":"Siemens SENTRON 5SM3646-0KL 4-pole RCCB, type AC, 63 A rated current, 300 mA trip, 400 V AC, 10 kA SCCR. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Solid":"1.5 ... 25 mm²","Stranded":"1.5 ... 25 mm²","Rated Value":"50 Hz","Wertebereich":"-5 ... +45 °C","Mounting type":"DIN rail (REG)","Number of poles":"4","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Product variations":"N left","Ambient temperature":"-40 ... +75 °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","circuit-breaker / Design":"5SM3","Short-circuit current rating":"10 kA","Current / at AC / rated value":"63 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=351944&mlfb=5SM3646-0KL","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM3646-0KL/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SM3646-0KL and how do I get a price?","answer":"This part is sourced and quoted to order through independent distribution. Submit an RFQ for current pricing and availability — confirmed at quote time."},{"question":"Will 5SM3646-0KL drop into a panel that was specified around 5SY4304-7CV without rewiring?","answer":"No — the 5SY4304-7CV is a 3-pole MCB (miniature circuit breaker) with a different function and form factor. The 5SM3646-0KL is a 4-pole RCCB occupying 4 width units versus 3 for the MCB, and it requires a neutral conductor connection. Panel wiring and space allocation would need to be revised."},{"question":"What are the conductor size limits for 5SM3646-0KL?","answer":"The terminals accept 1.5 to 25 mm² solid or stranded copper."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM3646-0KL","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/5SM3646-0KL 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}}