{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM2623-2","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM2623-2","canonicalUrl":"https://aoctrl.com/siemens/5SM2623-2","factsUrl":"https://aoctrl.com/api/mcp/products/5SM2623-2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON, selective RCD unit, 2 poles, 40 A AC rated, 300 mA residual current, AC type, 50 Hz, IP20, 70 x 70 x 90 mm.","salesMarkdown":"## Selective RCD for 5SL4 base units — 40 A, 300 mA, AC type The Siemens 5SM2623-2 is a 2-pole selective RCD unit (residual current device) from the SENTRON family, designed as a plug-in accessory for the 5SL4 series of miniature circuit breakers. It carries a 40 A rated current at AC and a 300 mA rated fault current, with AC-type residual current detection — meaning it trips on sinusoidal AC earth faults only, not pulsating DC or smooth DC. The selective design (time-delayed) means it coordinates with downstream RCDs: on a fault, the downstream device trips first, keeping this unit and upstream circuits live for supply continuity. This is not a standalone RCD — it mounts onto a 5SL4 base unit (the evidence calls it a 'product variation for 5SL4'), so you order the 5SL4 MCB separately and snap the 5SM2623-2 onto it. Fastening is standard DIN-rail REG (regular) clip. The unit is not sealable and has no adjustable off-delay or adjustable fault current — the 300 mA trip level is fixed.","metaTitle":"Siemens 5SM2623-2 SENTRON RCD, 2-pole 40A 300mA AC selective","metaDescription":"Siemens 5SM2623-2 SENTRON 2-pole selective RCD, 40A rated at AC, 300mA tripping, AC type. Current production lifecycle. 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":"5SM2623-2","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"No","description":"RC unit for 5SL4, 2-pole, type AC, selective, In: 40 A, 300 mA, Un AC: 230 V","Design Of Pole":"2 poles","Number Of Poles":"2","lifecycle_stage":"current","Fastening Method":"REG","Mounting Position":"any","at AC rated value":"40 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":"AC","at 40 °C rated value":"37.2 A","at 45 °C rated value":"37.2 A","at 50 °C rated value":"36 A","at 55 °C rated value":"34.8 A","at 60 °C rated value":"34 A","at 65 °C rated value":"33.2 A","at 70 °C rated value":"32 A","OFF-delay time adjustable":"No","For Testing Equipment Minimum":"195 V","Number Of Modular Width Units":"2","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 Voltage Resistance Rated Value":"4 000 V","Value Range Of The Operating Frequency":"50 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":"1.9 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/83047cdfc880ecfe4cf5f13112e68273.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=198927&mlfb=5SM2623-2"},"ai":{"faq":[{"question":"Where can I buy 5SM2623-2?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commitment."},{"question":"What is 5SM2623-2 used for?","answer":"It is a 2-pole selective RCD unit that snaps onto a 5SL4 series miniature circuit breaker to provide earth-fault protection with time-delayed coordination, preventing nuisance tripping of upstream circuits."},{"question":"What are the key ratings of 5SM2623-2?","answer":"Rated 40 A at AC, 300 mA residual fault current, AC type, 50 Hz, 460 V insulation voltage, overvoltage category III, pollution degree 2, IP20 when installed."},{"question":"Will 5SM2623-2 drop into a panel specified for 5SL4363-7?","answer":"No — 5SM2623-2 is a 2-pole selective RCD accessory for the 5SL4 base unit, while 5SL4363-7 is a different order code. The physical footprint (2 MW, DIN-rail clip) is standard, but the mating interface to the base unit is specific to the 5SL4 family. Verify the base unit model before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM2623-2","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/5SM2623-2 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}}