{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM2645-6","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM2645-6","canonicalUrl":"https://aoctrl.com/siemens/5SM2645-6","factsUrl":"https://aoctrl.com/api/mcp/products/5SM2645-6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON RCD-unit, 4-pole, 63 A AC rated, 300 mA Type A, instantaneous, 3 MW, IP20.","salesMarkdown":"## RCD-unit for equipment and fire protection in 4-wire systems The Siemens 5SM2645-6 is a 4-pole SENTRON residual current device (RCD) rated 63 A at AC and 300 mA fault current, designed for instantaneous tripping in 50 Hz networks. Type A detection means it catches sinusoidal AC faults plus pulsating DC residual currents — the standard choice for circuits with single-phase rectifiers, switched-mode supplies, or variable-speed drives that generate half-wave DC leakage. Depth of 77 mm and installation depth of 70 mm leave clearance for wiring ducts and gland plates in a typical 200 mm deep enclosure. Supply connection from top or bottom — no mandatory orientation, which simplifies busbar routing in a distribution board. IP20 with connected conductors and installed distribution board; degree of pollution 2, overvoltage category III, so it's suited for fixed indoor installations in commercial or industrial switchgear. ## Thermal derating and continuous current capability At 45 °C it's 58.59 A, at 50 °C it's 56.7 A, and at 70 °C it drops to 50.4 A. The full thermal curve means a panel builder sizing a 4-pole RCD for a 63 A busbar must account for the actual enclosure ambient — if the distribution board sits next to a heat source or in a non-ventilated cabinet, the effective continuous current may be lower than the 63 A label. Rated insulation voltage 460 V, surge current resistance 1 kA, surge voltage resistance 4 000 V — standard for 400/415 V three-phase networks. Listed as current production (active lifecycle stage). No end-of-life notice or last-time-buy date on record. The 5SM2645-6 is a standard SENTRON RCD variant, widely specified in European-style distribution boards.","metaTitle":"Siemens 5SM2645-6 SENTRON RCD, 4-pole, 63 A, 300 mA Type A","metaDescription":"Siemens 5SM2645-6 SENTRON RCD unit, 4-pole, 63 A rated current, 300 mA Type A residual current. Current 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":"77 mm","Width":"124 mm","title":"5SM2645-6","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"No","description":"RC unit for 5SY, 4-pole, type A, In: 63 A, 300 mA, Un AC: 400 V","Design Of Pole":"4 poles","Number Of Poles":"4","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 5SY","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":"instantaneous","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":"1 kA","Surge Voltage Resistance Rated Value":"4 000 V","Value Range Of The Operating Frequency":"50 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":"3 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/0c1b7161ea267524d261a5d581dddeb4.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=510909&mlfb=5SM2645-6"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM2645-6","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/5SM2645-6 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}}