{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM3642-0KL","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM3642-0KL","canonicalUrl":"https://aoctrl.com/siemens/5SM3642-0KL","factsUrl":"https://aoctrl.com/api/mcp/products/5SM3642-0KL","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SM3 series, RCCB residual current operated circuit breaker, 4-pole, type AC, In: 25 A, 300 mA, Un AC: 400 V, N left, DIN rail mount.","salesMarkdown":"The Siemens 5SM3642-0KL is a 4-pole residual current operated circuit breaker (RCCB) from the SENTRON 5SM3 series, rated 25 A at 400 V AC with a 300 mA residual tripping current, type AC (sensitive to sinusoidal AC fault currents only). It is an instantaneous (non-time-delayed) device, meaning it trips without intentional delay on a fault — typical for general-purpose shock protection where selectivity against downstream RCCBs is not required. The N-left variant places the neutral pole on the left side of the unit, matching panel layouts where the neutral bus is run leftmost. The 300 mA residual sensitivity is a common ground-fault protection level for fire prevention or equipment protection rather than direct personal shock protection (which typically uses 30 mA); it suits circuits where nuisance tripping from leakage on long cable runs or industrial gear must be avoided. Mounts on DIN rail (REG) in any orientation, occupying 4 width units — 70 mm installation depth. Terminals accept solid or stranded conductors from 1.5 mm² up to 25 mm²; tighten to 2.5–3 N·m. The housing is finger and back-of-hand safe with IP20 protection once the distribution board is installed and conductors are connected.","metaTitle":"Siemens 5SM3642-0KL SENTRON RCCB, 4P, 25A, 300mA, Type AC","metaDescription":"Siemens 5SM3642-0KL SENTRON RCCB, 4-pole, 25 A rated, 300 mA residual, type AC, 400 V, DIN rail mount. Current lifecycle active. 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":{"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","Current / at AC / rated value":"25 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=91286&mlfb=5SM3642-0KL","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM3642-0KL/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SM3642-0KL and how do I get a price?","answer":"The 5SM3642-0KL is available to order here against an RFQ. Submit a request for quotation; availability and current pricing are confirmed at quote time through our independent distribution channel."},{"question":"What conductor sizes does 5SM3642-0KL accept?","answer":"Solid conductors from 1.5 mm² up to 25 mm² and stranded conductors from 1.5 mm² up to 25 mm²."},{"question":"Will 5SM3642-0KL drop into a panel specified around 5SY4304-7CV without rewiring?","answer":"No. The 5SM3642-0KL is a 4-pole RCCB occupying 4 width units on DIN rail, while the 5SY4304-7CV is a 3-pole MCB occupying 3 width units. The terminal positions, pole count, and function (residual current vs. overcurrent protection) are different. Panel rewiring and a larger DIN rail cutout are required."},{"question":"What compliance documentation does Siemens provide for 5SM3642-0KL?","answer":"The evidence does not list specific compliance certificates (RoHS, REACH, UL, IEC) for this order code. As a current-production SENTRON device, it is designed to meet applicable IEC/EN standards for RCCBs; documentation is typically available from Siemens upon request or via their support portal."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM3642-0KL","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/5SM3642-0KL 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}}