{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM2623-0","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM2623-0","canonicalUrl":"https://aoctrl.com/siemens/5SM2623-0","factsUrl":"https://aoctrl.com/api/mcp/products/5SM2623-0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SM2623-0, 2-pole residual current circuit breaker (RCCB), Type AC, rated 40 A, 300 mA trip, 230 V AC, 2 MW units.","salesMarkdown":"The Siemens 5SM2623-0 is a 2-pole residual current circuit breaker (RCCB) from the SENTRON family, designed as a plug-in RC unit for the 5SL4 miniature circuit breaker series. It carries a 40 A rated current and a 300 mA tripping fault current, Type AC, for 230 V AC systems. The 300 mA sensitivity is typical for fire protection or circuits feeding equipment with higher leakage, rather than personnel protection (which usually calls for 30 mA). The 40 A rating is at 40 °C ambient; the part derates to 32 A at 70 °C, so panel builders need to check the thermal curve when packing breakers into a warm enclosure. Occupies 2 modular width units (MW) on a DIN rail, with a 70 mm depth that matches the standard 5SL4 breaker footprint. The 70 mm × 70 mm × 90 mm envelope (W×D×H) means it fits the same cutout as the companion MCB. Fastening method is REG (regular DIN-rail clip).","metaTitle":"Siemens 5SM2623-0 SENTRON RCCB, 2-pole, 40 A, 300 mA, Type A","metaDescription":"Siemens SENTRON 5SM2623-0 residual current circuit breaker (RCCB), 2-pole, 40 A rated, 300 mA trip, Type AC. Active production. Quoted to order.","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":"5SM2623-0","Height":"90 mm","Maximum":"45 °C","Minimum":"-5 °C","description":"RC unit for 5SL4, 2-pole, type AC, 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","Maximum Permissible":"75 °C","Minimum Permissible":"-40 °C","at AC / rated value":"40 A","Overvoltage Category":"III","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","Number Of Modular Width Units":"2","For Testing Equipment / Minimum":"195 V","Tripping Fault Current / Rated Value":"300 mA","Mechanical Service Life (Switching Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/974287fb234f4dbf8e890ed9a05584a0.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=250269&mlfb=5SM2623-0"},"ai":{"faq":[{"question":"Will 5SM2623-0 drop into a panel that was specified around 5SL4363-7 without rewiring?","answer":"No — the 5SM2623-0 is a 2-pole RCCB (70 mm wide, 2 MW), while the 5SL4363-7 is a 3-pole MCB (54 mm wide, 3 MW). The footprint, pole count, and function are different, so rewiring is required."},{"question":"What is 5SM2623-0's listed depth?","answer":"The installation depth is 70 mm, matching the overall depth of 70 mm."},{"question":"What is 5SM2623-0's listed width?","answer":"The width is 70 mm, which corresponds to 2 modular width units on a DIN rail."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM2623-0","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/5SM2623-0 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}}