{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1354-0LB40","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1354-0LB40","canonicalUrl":"https://aoctrl.com/siemens/5SU1354-0LB40","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1354-0LB40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SU1 RCBO, 40 A, B-curve, 10 kA per EN 60898, 2-pole 1P+N, 36 mm wide.","salesMarkdown":"The Siemens 5SU1354-0LB40 is a SENTRON RCBO — a combined residual-current circuit breaker with overcurrent protection — rated 40 A at 30 °C with a B tripping characteristic and a 10 kA breaking capacity per EN 60898. It protects a 1P+N (230 V AC) final subcircuit against overload, short-circuit, and earth leakage (AC type fault current). ## Current derating — the number that matters for the panel At 40 °C it's 37.6 A; at 50 °C it's 34.8 A; at 55 °C it's 32.4 A. If the panel ambient runs warm — say 45 °C inside the enclosure — the usable current drops to 36.4 A. That derating curve is the spec to check against the actual load, not the nameplate 40 A. The RCBO is 36 mm wide (2 width units), 90 mm tall, 77 mm deep with an installation depth of 70 mm. Halogen-free and silicon-free construction. IP20 with the distribution board installed and conductors connected. Overvoltage category III, energy limiting class 3.","metaTitle":"Siemens 5SU1354-0LB40 SENTRON RCBO, 40 A, B Curve, 10 kA","metaDescription":"Siemens 5SU1354-0LB40 SENTRON RCBO, 40 A rated, B tripping characteristic, 10 kA breaking capacity per EN 60898. 2-pole 1P+N, 36 mm wide. Sourced to order against an RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Depth":"77 mm","Solid":"0.75 ... 35 mm²","Width":"36 mm","Height":"90 mm","Maximum":"15.6 W","Stranded":"0.75 ... 35 mm²","at 30 Cel":"40 A","at 40 Cel":"37.6 A","at 45 Cel":"36.4 A","at 50 Cel":"34.8 A","at 55 Cel":"32.4 A","at 60 Cel":"32.4 A","at 65 Cel":"30.8 A","at 70 Cel":"29.2 A","Halogen-Free":"Yes","Silicon-Free":"Yes","During Storage":"-40 ... +75 °C","Number of poles":"2","Type of voltage":"AC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Ambient temperature":"-25 ... +55 °C","Product designation":"RCBO","Protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage category":"III","Energy limiting class":"3","Number of width units":"2","Type of fault current":"AC","Number of poles / Note":"1P+N","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","circuit-breaker / Design":"5SU1","Current / at AC / rated value":"40 A","Tripping characteristic class":"B","acc. to EN 60898 / rated value":"10 kA","For Testing Equipment / Minimum":"195 V","Position / of power supply cord":"Either top or bottom","Number of poles / with protection":"1","acc. to IEC 60947-2 / rated value":"15 kA","Product feature / Touch protection":"Yes","Supply voltage frequency / rated value":"50 Hz","Tripping residual current / rated value":"30 mA","Influence of the surrounding temperature":"Max. 95% humidity","Surge current resistance / at (8/20) μs":"3 kA","Tightening torque / with screw-type terminals":"2.5 ... 3 N·m","Product function / neutral conductor switching":"Yes","Mechanical service life (switching cycles) / typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/c2eb9b8aa73fcf0cb9be50c6e2c3edab.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=432107&mlfb=5SU1354-0LB40","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1354-0LB40/alternatives.json"},"ai":{"faq":[{"question":"Is 5SU1354-0LB40 available via RFQ confirmation and what is the lead time?","answer":"The part is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is 5SU1354-0LB40's listed depth?","answer":"The depth is 77 mm, with an installation depth of 70 mm."},{"question":"What conductor sizes does 5SU1354-0LB40 accept?","answer":"Solid and stranded conductors from 0.75 mm² up to 35 mm²."},{"question":"What compliance documentation does this brand provide for 5SU1354-0LB40?","answer":"The product is designed to EN 60898 (10 kA breaking capacity) and carries overvoltage category III classification. It is halogen-free and silicon-free. Specific RoHS/REACH/UL declarations should be confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU1354-0LB40","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/5SU1354-0LB40 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}}