{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1354-1LB40","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1354-1LB40","canonicalUrl":"https://aoctrl.com/siemens/5SU1354-1LB40","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1354-1LB40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SU1354-1LB40 RCBO, 40 A rated, C characteristic, 10 kA breaking capacity, 2-pole 1P+N, 2 MW wide, Type AC fault current.","salesMarkdown":"The 77 mm depth plus 70 mm installation depth means it sits flush in a typical distribution board without protruding past the gland plate. Mounting position is any, so no restriction on board orientation. ## Thermal derating — what the numbers mean At 40 °C it's 37.6 A; at 50 °C, 34.8 A; at 60 °C, 32.4 A; at 70 °C, 29.2 A. That's a roughly 27 % derating from 30 °C to 70 °C. If this RCBO sits in a crowded board next to other heat sources, the effective current capacity drops — plan the load accordingly. Rated per EN 60898 for the 10 kA breaking capacity. Overvoltage category III, energy limiting class 3. The design code is 5SU1; the function letter per DIN EN 61346-2 and DIN EN 81346-2 is F (protective device). Type of fault current is AC (sine-wave residual current detection).","metaTitle":"Siemens 5SU1354-1LB40 SENTRON RCBO, 40A C-Curve, 10kA, 2-Pol","metaDescription":"Siemens 5SU1354-1LB40 SENTRON RCBO, 40A rated, C tripping characteristic, 10kA breaking capacity per EN 60898. 2-pole 1P+N, 2 MW wide. Current production. Quoted to order.","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":"C","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/29e47456cd87452281801df40763ddda.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=477538&mlfb=5SU1354-1LB40","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1354-1LB40/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SU1354-1LB40 and how is it quoted?","answer":"This RCBO is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"What is the depth of 5SU1354-1LB40?","answer":"The depth is 77 mm, with an installation depth of 70 mm. It fits standard distribution boards without protruding past the gland plate."},{"question":"What conductor sizes does 5SU1354-1LB40 accept?","answer":"It accepts 0.75 to 35 mm² solid or stranded conductors. That covers a 40 A feed and downstream daisy-chaining."},{"question":"Will 5SU1354-1LB40 drop into a panel specified for 5SL6563-7BB?","answer":"Both are 2-module-wide (36 mm) DIN-rail RCBOs with similar ratings, but the 5SL6563-7BB is a different SENTRON sub-series. The 5SU1354-1LB40 is a current-production Type AC RCBO; the 5SL series may have different accessories or busbar compatibility. Check the busbar pitch and terminal layout before substituting — the footprint is the same, but the connection scheme can differ."},{"question":"What compliance documentation does Siemens provide for 5SU1354-1LB40?","answer":"The RCBO is rated per EN 60898, overvoltage category III, energy limiting class 3. It is halogen-free and silicon-free. The manufacturer typically provides a Declaration of Conformity (CE), and the part carries the function letter F per DIN EN 61346-2 and DIN EN 81346-2. Specific RoHS/REACH declarations are available from Siemens on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU1354-1LB40","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/5SU1354-1LB40 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}}