{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU9356-7KN40","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU9356-7KN40","canonicalUrl":"https://aoctrl.com/siemens/5SU9356-7KN40","factsUrl":"https://aoctrl.com/api/mcp/products/5SU9356-7KN40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SU9 series, 5SU9356-7KN40 RCD-operated circuit breaker, 2-pole 1P+N, 40 A, Type A, 6 kA (EN 60898) / 10 kA (IEC 60947-2), 2 MW width units.","salesMarkdown":"Siemens 5SU9356-7KN40 is a SENTRON 2-pole RCBO (RCD-operated circuit breaker) rated 40 A with Type A fault current sensitivity. It combines overcurrent protection and residual current detection in a single 36 mm wide module — two width units on the DIN rail. The C tripping characteristic handles moderate inrush from motorized loads like small pumps or compressors. ## Ratings & fit Breaking capacity: 6 kA per EN 60898 for branch-circuit protection in residential or light commercial panels, and 10 kA per IEC 60947-2 for industrial distribution boards — the higher figure applies when the prospective short-circuit current exceeds 6 kA, common in factory main panels. Type A detection catches pulsating DC fault currents from electronics and single-phase rectified loads, not just pure AC sine-wave faults. Thermal derating is specified: 40 A at 30 °C, 37.6 A at 40 °C, 36.4 A at 45 °C, 34.8 A at 50 °C, 32.4 A at 55 °C. Ambient operating range -25 to +45 °C; storage -40 to +75 °C. Mounting position any orientation; installation depth 70 mm, device depth 77 mm. IP20 with distribution board installed and conductors connected. Touch protection integrated on the terminals.","metaTitle":"Siemens 5SU9356-7KN40 SENTRON RCBO, 40 A, Type A, 6 kA","metaDescription":"Siemens 5SU9356-7KN40 SENTRON 2-pole RCBO, 40 A rated, Type A, 6 kA (EN 60898) / 10 kA (IEC 60947-2), 2 MW. Current lifecycle. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","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=629397&mlfb=5SU9356-7KN40","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU9356-7KN40/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SU9356-7KN40?","answer":"6 kA per EN 60898 for branch-circuit duty, and 10 kA per IEC 60947-2 for industrial panel applications. The higher 10 kA rating applies when the prospective fault current exceeds 6 kA, which is typical in factory distribution boards."},{"question":"What wire sizes does 5SU9356-7KN40 accept?","answer":"Solid or stranded conductors from 0.75 mm² up to 35 mm² — covers branch-circuit feeds up to roughly 6 AWG. The spring terminals accommodate both solid and stranded without ferrule requirement."},{"question":"Where can I buy 5SU9356-7KN40?","answer":"Sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — no stock count or lead-time number is published here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU9356-7KN40","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/5SU9356-7KN40 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}}