{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM2625-2","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM2625-2","canonicalUrl":"https://aoctrl.com/siemens/5SM2625-2","factsUrl":"https://aoctrl.com/api/mcp/products/5SM2625-2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SM2625-2, selective RC unit for 5SY miniature circuit breakers, 2-pole, Type AC, rated current 63 A, rated residual current 300 mA, supply voltage 230/400 V AC, DIN rail mount.","salesMarkdown":"The 300 mA tripping threshold is deliberately higher than the 30 mA used for personal shock protection; this is a selective (time-delayed) unit, so it coordinates with downstream 30 mA RCDs by letting them clear a fault first before this one trips, keeping the main distribution board live during a branch fault. Rated at 63 A continuous on a 230/400 V AC supply, this RC unit handles the full load of a sub-distribution board or a heavy feeder circuit. The 2-pole design switches both phase and neutral on a single-phase supply, or two phases on a three-phase system where neutral protection isn't required. It mounts on DIN rail (REG profile) and takes up 2 width units — about 36 mm of rail space — so it fits standard distribution boards without crowding. The screw-type terminals accept both solid and stranded conductors from 1.5 mm² up to 25 mm². That's a wide grip range — the 25 mm² top end means you can feed a 63 A submain directly without a reduction ferrule. Tightening torque is 2.5 to 3 N·m, which is in the usual range for this class; a torque screwdriver set to 2.8 N·m is a safe middle value. ## Mechanical endurance and testing Rated for 10,000 mechanical switching cycles, which is standard for a fixed-installation RCD — this isn't a daily-switched device, but it will handle periodic manual testing and the occasional fault clearing without wearing out. The test circuit requires a minimum of 195 V AC to operate the test button, so verify the supply voltage on site before relying on the monthly test function.","metaTitle":"Siemens 5SM2625-2 SENTRON RC Unit, 63 A, 300 mA, Type AC","metaDescription":"Siemens SENTRON 5SM2625-2 selective RC unit for 5SY MCBs, 2-pole, 63 A, 300 mA, Type AC, 230/400 V. Current lifecycle stage. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Solid":"1.5 ... 25 mm²","title":"5SM2625-2","Stranded":"1.5 ... 25 mm²","Rated Value":"50 Hz","description":"RC unit for 5SY, 2-pole, type AC, selective, In: 63 A, 300 mA, Un AC: 230 V","Mounting type":"DIN rail (REG)","During Storage":"-40 ... +75 °C","Number of poles":"2","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Product variations":"for 5SY","Ambient temperature":"-5 ... +45 °C","Operating frequency":"50Hz","Product designation":"RC unit","Protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage category":"III","Design of the product":"Selective","Number of width units":"2","Type of fault current":"AC","circuit-breaker / Design":"5SM2","Current / at AC / rated value":"63 A","Product feature / silicon-free":"Yes","Position / of power supply cord":"top or bottom","Protection against electrical shock":"Finger and back-of-hand safe","Supply voltage / at AC / rated value":"230/400 V","Switching function / short-term delayed":"No","Tripping residual current / rated value":"300 mA","Tightening torque / with screw-type terminals":"2.5 ... 3 N·m","Size of installation devices / acc. to DIN 43880":"1","Supply voltage / for testing equipment / minimum":"195 V","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/97e58025c58eb80bc2702b5ce4730e98.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=55215&mlfb=5SM2625-2"},"ai":{"faq":[{"question":"Where can I buy 5SM2625-2 and get current pricing?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at the time of quote — no stock count or price is published here."},{"question":"What is the closest functional second-source for 5SM2625-2?","answer":"The 5SY4304-7CV is a 3-pole MCB from the same SENTRON family, not a direct functional substitute. The 5SM2625-2 is a 2-pole selective RC unit designed specifically to pair with a 5SY MCB; there is no drop-in second-source that matches both the form factor (2 width units) and the selective 300 mA characteristic without rewiring the panel."},{"question":"What conductor sizes does the 5SM2625-2 accept?","answer":"The screw terminals accept solid and stranded conductors from 1.5 mm² up to 25 mm². Tightening torque is 2.5 to 3 N·m."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM2625-2","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/5SM2625-2 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}}