{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM2623-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM2623-8","canonicalUrl":"https://aoctrl.com/siemens/5SM2623-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SM2623-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON selective RCD unit, 2-pole, type A, 40 A rated current, 300 mA rated fault current, Un AC 230 V, 2 MW, IP20.","salesMarkdown":"The Siemens SENTRON 5SM2623-8 is a 2-pole selective residual current device (RCD-unit) rated for 40 A at 230 V AC, with a 300 mA rated fault current. It is designed to mount in distribution boards alongside 5SL4 miniature circuit breakers, occupying 2 modular width units on the DIN rail. The selective (type S) design means it delays tripping during short-duration earth faults, coordinating with downstream RCDs so only the faulted branch clears — critical for maintaining supply to essential circuits in a panel. Rated at 40 A and 300 mA fault current, this unit protects a 230 V AC circuit against earth leakage while allowing normal load current up to 40 A. The selective characteristic (IΔn = 300 mA) provides a time delay so that downstream 30 mA RCDs trip first — the 5SM2623-8 only operates on sustained faults, preventing a nuisance blackout of the whole submain. Insulation voltage (Ui) is rated 460 V, and surge voltage resistance is 4 000 V, confirming it handles overvoltage Category III conditions typical of distribution panels. Protection class is IP20 with conductors connected and the distribution board installed — standard for enclosed panel mounting. The unit is not sealable, so it is intended for accessible distribution boards where periodic testing is required.","metaTitle":"Siemens SENTRON 5SM2623-8 RCD Unit, 2-pole, 40 A, 300 mA, Se","metaDescription":"Siemens SENTRON 5SM2623-8 selective RCD unit, 2-pole, 40 A, 300 mA, 230 V AC. Active production. Quoted 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":"70 mm","title":"5SM2623-8","Height":"90 mm","Maximum":"45 °C","Minimum":"-25 °C","Sealable":"No","description":"RC unit for 5SL4, 2-pole, type A, selective, In: 40 A, 300 mA, Un AC: 230 V","Number Of Poles":"2","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","protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage Category":"III","Design Of The Product":"Selective","OFF-delay time adjustable":"No","Number Of Modular Width Units":"2","Rated Fault Current Adjustable":"No","Protection Function False Tripping":"Yes","insulation voltage (Ui) rated value":"460 V","Surge Voltage Resistance Rated Value":"4 000 V","Value Range Of The Operating Frequency":"50/60 Hz","Value Range Of The Supply Voltage Frequency":"50 Hz","Supply Voltage For Testing Equipment Minimum":"195 V","Mechanical Service Life (Operating Cycles) Typical":"10 000","for rated value of the current at AC in hot operating state per pole":"1.9 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e068dc78755c5dce71f65e383a1ec150.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=95343&mlfb=5SM2623-8"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 5SM2623-8?","answer":"Pricing and availability are confirmed at quote time. Submit an RFQ for the 5SM2623-8; the current market price and stock position will be provided in the quotation."},{"question":"Will 5SM2623-8 drop into a panel specified around 5SL4363-7 without rewiring?","answer":"No — the 5SM2623-8 is a 2-pole RCD unit (70 mm wide, 2 MW), while the 5SL4363-7 is a 3-pole miniature circuit breaker (54 mm wide, 3 MW). They serve different functions (earth fault protection vs overcurrent protection) and have different pole counts and widths, so they are not direct drop-in replacements. The 5SM2623-8 is designed to pair with a 5SL4 MCB like the 5SL4363-7 on the same DIN rail, not to replace it."},{"question":"What compliance documentation does this brand provide for 5SM2623-8?","answer":"As a Siemens SENTRON product, the 5SM2623-8 carries the manufacturer's standard documentation package including CE declaration of conformity and is designed to meet relevant IEC/EN standards for RCDs. Specific compliance documentation (RoHS, REACH, UL) should be requested at time of order to confirm applicability to the target jurisdiction."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM2623-8","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/5SM2623-8 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}}