{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1354-7KK40","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1354-7KK40","canonicalUrl":"https://aoctrl.com/siemens/5SU1354-7KK40","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1354-7KK40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON RCBO, 1P+N, 40 A, 30 mA, Type A, 10 kA, 2 MW, 50 Hz.","salesMarkdown":"The Siemens 5SU1354-7KK40 is a SENTRON RCBO — a combined overcurrent and residual-current device in a 2-module-wide (36 mm) package. It protects a single-phase final subcircuit (1P+N, two poles, one protected) against overload, short-circuit, and earth leakage. The 40 A rated current at 30 °C and 30 mA residual sensitivity cover most socket-outlet and lighting circuits in commercial and light-industrial panels. The Type A residual-current characteristic detects pulsating DC fault currents (rectified half-wave) as well as sinusoidal AC — a requirement for circuits feeding electronic loads like switched-mode power supplies, VFDs, or LED drivers that can generate smooth DC leakage. The C tripping characteristic (5-10× In magnetic trip) handles moderate inrush from motorized loads and small transformers without nuisance trips. ## Thermal derating — the real-world current limit The 40 A rating holds only at 30 °C ambient inside the panel. At 40 °C the RCBO must be derated to 37.6 A; at 45 °C to 36.4 A; at 50 °C to 34.8 A; at 55 °C to 32.4 A; at 60 °C to 32.4 A; at 65 °C to 30.8 A; and at 70 °C to 29.2 A. If the panel runs warm — say, a packed enclosure with multiple devices — the actual continuous current the device can carry without tripping is lower than the nameplate 40 A. IP20 applies only when the distribution board is installed and conductors are connected — meaning the RCBO itself is finger-safe inside the enclosure but not rated for exposed or wet locations.","metaTitle":"Siemens 5SU1354-7KK40 SENTRON RCBO, 40A, 30mA, Type A, 10kA","metaDescription":"Siemens SENTRON 5SU1354-7KK40 RCBO, 40A rated, 30mA residual, Type A, 10kA breaking capacity per EN 60898. Active production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Depth":"77 mm","Width":"36 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"1P+N","Number Of Poles":"2","lifecycle_stage":"current","Mounting Position":"any","at AC rated value":"40 A","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"2","Operating Frequency":"50 Hz","Product Designation":"RCBO","protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage Category":"III","Design Of The Product":"Instantaneous","Residual Current Type":"A","Weight With Packaging":"282 g","at 30 °C rated value":"40 A","at 40 °C rated value":"37.6 A","at 45 °C rated value":"36.4 A","at 50 °C rated value":"34.8 A","at 55 °C rated value":"32.4 A","at 60 °C rated value":"32.4 A","at 65 °C rated value":"30.8 A","at 70 °C rated value":"29.2 A","Energy Limitation Class":"3","For Testing Equipment Minimum":"195 V","Number Of Modular Width Units":"2","Position Of Power Supply Cord":"Either top or bottom","Tripping Characteristic Class":"C","Number Of Poles With Protection":"1","according to EN 60898 rated value":"10 kA","Tripping Fault Current Rated Value":"30 mA","insulation voltage (Ui) rated value":"264 V","Supply Voltage Frequency Rated Value":"50 Hz","Surge Voltage Resistance Rated Value":"4 000 V","according to IEC 60947-2 rated value":"15 kA","Surge Current Resistance At (8/20) μS":"1 kA","Influence Of The Surrounding Temperature":"Max. 95% humidity","Type Of Voltage Of The Operating Voltage":"AC","Mechanical Service Life (Operating Cycles) Typical":"10 000","for rated value of the current at AC in hot operating state per pole":"7.8 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/3cf5a3277d8567fbe7bf14e601ac2344.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=91254&mlfb=5SU1354-7KK40","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1354-7KK40/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SU1354-7KK40 and how do I get a price?","answer":"The part is sourced to order against an RFQ through independent distribution. Submit a request for quote; availability and current pricing are confirmed at quote time."},{"question":"What is 5SU1354-7KK40's listed depth?","answer":"The depth is 77 mm, with an installation depth of 70 mm."},{"question":"What is 5SU1354-7KK40's listed width?","answer":"The width is 36 mm, which corresponds to 2 modular units on a standard DIN rail."},{"question":"Will 5SU1354-7KK40 drop into a panel specified around 5SU9354-7KK16 without rewiring?","answer":"Both are 2-module-wide SENTRON RCBOs with the same DIN-rail footprint and 77 mm depth, so the mechanical fit is identical. However, the 5SU9354-7KK16 has a different current rating and residual characteristic — check the circuit's load and leakage requirements before swapping."},{"question":"What compliance documentation does Siemens provide for 5SU1354-7KK40?","answer":"The RCBO is halogen-free and silicon-free. It carries a rated insulation voltage (Ui) of 264 V and is designed for overvoltage category III, pollution degree 2. The breaking capacity is certified according to EN 60898. For specific RoHS/REACH declarations and UL/IEC certificates, request the manufacturer's compliance documentation with your RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU1354-7KK40","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/5SU1354-7KK40 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}}