{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM2636-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM2636-8","canonicalUrl":"https://aoctrl.com/siemens/5SM2636-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SM2636-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SM2636-8, selective RCD unit, 3-pole, 63 A AC rated, Type A, 300 mA fault current, IP20, 50/60 Hz.","salesMarkdown":"## What the 63 A rating means in the panel The Siemens 5SM2636-8 is a SENTRON selective RCD unit — a residual-current device designed for Type A fault detection (AC and pulsating DC) at a fixed 300 mA trip threshold, rated 63 A across three poles on 50/60 Hz AC supply. Selective (time-delayed) means it coordinates downstream so a fault on a sub-circuit trips the branch RCD first, keeping this unit closed and the main bus live — critical in distribution boards feeding multiple sub-panels or heavy loads like motor control centres. The 63 A AC-1 rating (resistive load) is the headline number, but the real-world current capacity drops with panel ambient temperature: 58.6 A at 40 °C, 56.7 A at 50 °C, and 50.4 A at 70 °C. ## Integration into the distribution board Mounting position is any orientation; supply can enter top or bottom. The 460 V rated insulation voltage (Ui) and 4 000 V surge withstand confirm it handles the transients common on 400 V three-phase networks. ## What the Type A and 300 mA rating decide Type A residual current detection catches both sinusoidal AC faults and pulsating DC — the kind generated by single-phase rectifiers in VFDs, switched-mode supplies, or LED drivers. The 300 mA trip threshold is deliberately high: selective RCDs at this level are used for fire protection or main-switch duty, not personnel protection (which requires 30 mA). The 5 kA surge current resistance means it withstands lightning or switching surges without nuisance tripping — a common requirement on incoming supply feeders.","metaTitle":"Siemens 5SM2636-8 SENTRON RCD, 63A 3-Pole Type A 300mA","metaDescription":"Siemens 5SM2636-8 SENTRON selective RCD unit, 63 A rated, 3-pole, Type A, 300 mA trip, IP20. 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":"105 mm","title":"5SM2636-8","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"No","description":"RC unit for 5SL4, 3-pole, type A, selective, In: 63 A, 300 mA, Un AC: 400 V","Design Of Pole":"3 poles","Number Of Poles":"3","lifecycle_stage":"current","Fastening Method":"REG","Mounting Position":"any","at AC rated value":"63 A","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Product Variations":"for 5SL4","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":"58.6 A","at 45 °C rated value":"58.59 A","at 50 °C rated value":"56.7 A","at 55 °C rated value":"54.81 A","at 60 °C rated value":"53.55 A","at 65 °C rated value":"52.29 A","at 70 °C rated value":"50.4 A","OFF-delay time adjustable":"No","For Testing Equipment Minimum":"195 V","Number Of Modular Width Units":"3","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","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":"3 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/5210ada165f801c2516e6a1c4058ed66.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=508835&mlfb=5SM2636-8"},"ai":{"faq":[{"question":"What is the 5SM2636-8 used for?","answer":"It is a selective (time-delayed) Type A RCD unit for 3-pole AC circuits up to 63 A, typically used as a main-switch or fire-protection device in distribution boards where coordination with downstream RCDs is required."},{"question":"How do I get current pricing and availability for 5SM2636-8?","answer":"Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time."},{"question":"What is 5SM2636-8's listed depth?","answer":"The installation depth is 70 mm, with a width of 105 mm (3 modular units) and a height of 90 mm."},{"question":"Does the 5SM2636-8 replace the 5SL4363-7 in a panel?","answer":"Both are 3-pole SENTRON RCD units, but the 5SM2636-8 is a selective (time-delayed) design at 300 mA, while the 5SL4363-7 is a standard RCD. They share the same DIN-rail footprint and wiring pattern, so a physical swap is straightforward, but the time-delay characteristic changes coordination with downstream devices — verify the selective grading before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM2636-8","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/5SM2636-8 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}