{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1353-7KK40","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1353-7KK40","canonicalUrl":"https://aoctrl.com/siemens/5SU1353-7KK40","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1353-7KK40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SU1353-7KK40 RCBO, 1P+N, 40 A rated, 30 mA residual current, Type A, tripping characteristic C, 4.5 kA breaking capacity per EN 60898.","salesMarkdown":"It protects a 1P+N circuit against overload, short-circuit, and earth leakage in one device, saving a DIN-rail position compared to separate RCD and MCB units. The 30 mA Type A residual-current element catches both sinusoidal AC faults and pulsating DC fault currents — the standard for circuits supplying single-phase electronics, VFDs, or EV chargers. ## Current derating and ambient temperature At 40 °C it derates to 37.6 A, at 50 °C to 34.8 A, and at 60 °C to 32.4 A. At 70 °C the continuous rating drops to 29.2 A. If the board runs warm — say, a packed enclosure near a boiler or in a plant air handling unit — use the 50 °C or 60 °C column to size the load. The device is rated for ambient down to -40 °C and up to 75 °C, covering outdoor cabinets in cold climates and hot machine compartments. Two modular width units (36 mm) — check the board's spare way count. Supply can enter from top or bottom; the neutral is switched internally (1P+N). Pollution degree 2, overvoltage category III, so it's rated for fixed-installation distribution boards in residential, commercial, and industrial buildings. IP20 with the distribution board installed and conductors connected.","metaTitle":"Siemens 5SU1353-7KK40 SENTRON RCBO, 40 A, 30 mA, Type A, C-c","metaDescription":"Siemens 5SU1353-7KK40 SENTRON RCBO, 1P+N, 40 A rated, 30 mA residual, Type A, C-curve, 4.5 kA breaking capacity per EN 60898. Current production. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"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","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"2","Operating Frequency":"50 Hz","Product Designation":"RCBO","at AC / rated value":"40 A","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","Energy Limitation Class":"3","Weight / With Packaging":"289 g","according to EN 61346-2":"F","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","according to IEC 81346-2":"F","Number Of Modular Width Units":"2","Tripping Characteristic Class":"C","For Testing Equipment / Minimum":"195 V","Position / Of Power Supply Cord":"Either top or bottom","Number Of Poles / With Protection":"1","according to EN 60898 / rated value":"4.5 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":"10 kA","Influence Of The Surrounding Temperature":"Max. 95% humidity","Surge Current Resistance / At (8/20) μS":"1 kA","Type Of Voltage / Of The Operating Voltage":"AC","Mechanical Service Life (Switching Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/517acd51594a952537d38e6fc8e120b4.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=344877&mlfb=5SU1353-7KK40","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1353-7KK40/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SU1353-7KK40?","answer":"4.5 kA rated breaking capacity according to EN 60898. This is the standard breaking capacity for the C-curve 40 A variant in this series."},{"question":"What residual current type is 5SU1353-7KK40?","answer":"Type A — detects sinusoidal AC fault currents and pulsating DC fault currents up to 30 mA. Required for circuits with single-phase rectifiers, switch-mode power supplies, and VFDs."},{"question":"How do I get current pricing and availability for 5SU1353-7KK40?","answer":"Submit an RFQ through this listing. Pricing and availability are confirmed at quote time through independent distribution channels; no stock or price figures are published here."},{"question":"What compliance documentation is available for 5SU1353-7KK40?","answer":"The device is halogen-free and silicon-free. It carries the EN 61346-2 and IEC 81346-2 designation letter F for overcurrent protective devices. Full compliance documentation (CE, RoHS, REACH) is provided with the product; specific certificates can be requested at time of order."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU1353-7KK40","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/5SU1353-7KK40 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}}