{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM1746-0","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM1746-0","canonicalUrl":"https://aoctrl.com/siemens/5SM1746-0","factsUrl":"https://aoctrl.com/api/mcp/products/5SM1746-0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SM1 series, RCCB, 4-pole, In 63 A, IΔn 500 mA, type AC, Un 400 V AC, 10 kA SCCR, DIN rail mount.","salesMarkdown":"The Siemens SENTRON 5SM1746-0 is a 4-pole residual current circuit breaker (RCCB), type AC, rated 63 A at 400 V AC with a 500 mA tripping residual current and a 10 kA short-circuit current rating. The 63 A rating holds at 40 °C and 45 °C; above that it derates linearly to 50.4 A at 70 °C. The 500 mA residual-current sensitivity is for equipment protection or fire prevention, not personnel shock protection. That is typical for a distribution board fed from a transformer with moderate fault capacity; if the prospective fault current exceeds 10 kA, a backup fuse or MCB is needed upstream. Wire range accepts 1.5 to 25 mm² solid or stranded, terminated under screw terminals with a tightening torque of 2.5 to 3 N·m. ## Deployment context IP20 when installed with conductors connected — suitable for dry indoor enclosures, not washdown or outdoor exposure.","metaTitle":"Siemens SENTRON 5SM1746-0 RCCB, 4P, 63A, 500mA, Type AC","metaDescription":"Siemens SENTRON 5SM1746-0 RCCB, 4-pole, 63A, 500mA residual, Type AC, 400V, 10kA SCCR, DIN rail. Active production. Sourced to order.","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","Stranded":"1.5 ... 25 mm²","at 40 Cel":"63 A","at 45 Cel":"63 A","at 50 Cel":"60.48 A","at 55 Cel":"57.96 A","at 60 Cel":"55.44 A","at 65 Cel":"52.92 A","at 70 Cel":"50.4 A","Rated Value":"50 Hz","Wertebereich":"-5 ... +45 °C","Mounting type":"DIN rail (REG)","Number of poles":"4","lifecycle_stage":"current","Mounting position":"any","Installation depth":"55 mm","Product brand name":"SENTRON","Ambient temperature":"-40 ... +60 °C","Operating frequency":"50Hz","Product designation":"RCCB","Protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage category":"III","Design of the product":"Instantaneous","Number of width units":"4","Type of fault current":"AC","I2t-value / permissible":"70 000 A²·s","circuit-breaker / Design":"5SM1","Short-circuit current rating":"10 kA","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":"400 V","Switching function / short-term delayed":"No","Tripping residual current / rated value":"500 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":"100 V","Mechanical service life (switching cycles) / typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=159591&mlfb=5SM1746-0","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM1746-0/alternatives.json"},"ai":{"faq":[{"question":"What are the solid and stranded wire ranges for 5SM1746-0?","answer":"The solid wire range is 1.5 to 25 mm² and the stranded wire range is also 1.5 to 25 mm². Terminals are screw-type with a tightening torque of 2.5 to 3 N·m."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM1746-0","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/5SM1746-0 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}}