{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU9356-7KM40","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU9356-7KM40","canonicalUrl":"https://aoctrl.com/siemens/5SU9356-7KM40","factsUrl":"https://aoctrl.com/api/mcp/products/5SU9356-7KM40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SU9356-7KM40, RCBO, 40 A, 30 mA, type A, 1P+N, 6 kA (EN 60898), 10 kA (IEC 60947-2), characteristic C, 2 MW, halogen-free.","salesMarkdown":"The Siemens SENTRON 5SU9356-7KM40 is an RCD-operated circuit breaker (RCBO) combining overcurrent protection and residual current detection in a single 2-module (36 mm wide) package. The type A residual current detection covers pulsating DC fault currents, common on single-phase electronics and rectified loads. ## Breaking capacity and standards Overvoltage category III confirms suitability for fixed installation downstream of the utility meter. ## Thermal derating and conductor sizing Rated current of 40 A at 30 °C derates to 37.6 A at 40 °C, 36.4 A at 45 °C, 34.8 A at 50 °C, and 32.4 A at 55 °C. In a 40 °C panel — typical for enclosed distribution boards — the effective continuous current is 37.6 A, so size the downstream load accordingly. Mounting position any, supply feed either top or bottom. IP20 with connected conductors in an installed distribution board — standard for enclosed panel use. Halogen-free and silicon-free construction suits environments sensitive to corrosive off-gassing (data centers, medical facilities).","metaTitle":"Siemens SENTRON 5SU9356-7KM40 RCD-operated circuit breaker,","metaDescription":"Siemens SENTRON 5SU9356-7KM40 RCD-operated circuit breaker, 40 A rated current, 6 kA breaking capacity per EN 60898, 10 kA per IEC 60947-2. Type A, 1P+N, characteristic C. Active p","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":"1.5 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","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 ... +45 °C","Product designation":"RCD-operated circuit breaker","Protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage category":"III","Design of the product":"Instantaneous","Energy limiting class":"3","Number of width units":"2","Type of fault current":"A","Number of poles / Note":"1P+N","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","circuit-breaker / Design":"5SU9","Current / at AC / rated value":"40 A","Tripping characteristic class":"C","acc. to EN 60898 / rated value":"6 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":"10 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":"1 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/79f6610cfebb3bc98ed563eb1e55c601.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=629390&mlfb=5SU9356-7KM40","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU9356-7KM40/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SU9356-7KM40 and how do I get a price?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Submit a request for current pricing and availability."},{"question":"What is the breaking capacity of 5SU9356-7KM40?","answer":"6 kA per EN 60898 and 10 kA per IEC 60947-2."},{"question":"What conductor sizes does 5SU9356-7KM40 accept?","answer":"Solid or stranded conductors from 0.75 mm² up to 35 mm²."},{"question":"Does 5SU9356-7KM40 fit a panel specified for 5SU9354-7KK16?","answer":"Both are 2-module (36 mm wide) SENTRON RCBOs with the same DIN-rail footprint, so mechanical fit is identical. Verify the specific ratings (current, type, breaking capacity) match your application."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU9356-7KM40","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/5SU9356-7KM40 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}}