{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM2745-0","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM2745-0","canonicalUrl":"https://aoctrl.com/siemens/5SM2745-0","factsUrl":"https://aoctrl.com/api/mcp/products/5SM2745-0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SM2745-0, 4-pole RCD unit, type AC, rated 63 A, 500 mA trip, instantaneous, for 5SY series, 4 MW, 50 Hz.","salesMarkdown":"It handles a rated current of 63 A and trips at 500 mA residual current, type AC (sensitive to sinusoidal AC fault currents only). Rated at 63 A continuous, this RCD pairs with a 63 A or lower-rated MCB upstream; exceeding that continuous current risks nuisance tripping from thermal effects in the RCD itself. The 500 mA trip threshold is higher than the typical 30 mA for personal shock protection — it is sized for equipment protection or fire prevention where some leakage is expected (e.g., long cable runs, industrial heaters). Type AC detection covers sinusoidal AC faults only; if the load includes rectifiers, VFDs, or switched-mode supplies that generate pulsed DC fault currents, a type A RCD would be needed instead. Installation depth is 70 mm, matching the 5SY breaker it clips onto. The fastening method is REG (regular DIN-rail clip). Insulation voltage (Ui) is 460 V, surge voltage resistance 4 kV, overvoltage category III, pollution degree 2 — suitable for fixed-installation distribution boards in normal indoor environments. Supply frequency is 50 Hz only.","metaTitle":"Siemens 5SM2745-0 SENTRON RCD, 4-pole, 63 A, 500 mA, Type AC","metaDescription":"Siemens 5SM2745-0 SENTRON RCD unit, 4-pole, 63 A rated current, 500 mA trip, type AC, instantaneous. Current lifecycle stage. Available to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Maximum":"45 °C","Minimum":"-5 °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","at AC / rated value":"63 A","Overvoltage Category":"III","Design Of The Product":"instantaneou","Residual Current Type":"AC","OFF-delay time adjustable":"No","Number Of Modular Width Units":"4","Rated Fault Current Adjustable":"No","Protection Function / False Tripping":"Yes","Tripping Fault Current / Rated Value":"500 mA","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 (Switching Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$26.67","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/f5d367cd18a3842c710b5fc975f92e13.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=230224&mlfb=5SM2745-0","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM2745-0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the 5SM2745-0 and get a price?","answer":"The part is sourced and quoted to order against an RFQ through independent distribution channels. Submit an RFQ for current availability and pricing."},{"question":"What are the key electrical ratings of the 5SM2745-0?","answer":"Rated current 63 A, residual trip current 500 mA, type AC, insulation voltage 460 V, surge voltage 4 kV, frequency 50 Hz."},{"question":"What compliance documentation is available for the 5SM2745-0?","answer":"The SENTRON series typically carries CE marking and complies with IEC/EN 61008 for RCDs. Specific UL, CSA, or RoHS/REACH declarations should be confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM2745-0","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/5SM2745-0 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}}