{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1656-7KK40","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1656-7KK40","canonicalUrl":"https://aoctrl.com/siemens/5SU1656-7KK40","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1656-7KK40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SU1 series RCBO, 40 A rated, tripping characteristic C, 6 kA breaking capacity, Type A fault current, 1P+N, 2 MW wide.","salesMarkdown":"The fault-current sensing is Type A, so it catches pulsating DC residual currents from rectified loads like switched-mode supplies or variable-speed drives. The thermal derating curve is published: 37.6 A at 40 °C, 36.4 A at 45 °C, 34.8 A at 50 °C, 32.4 A at 55 °C (the upper operating limit), and 29.2 A at 70 °C. The power dissipation is 15.6 W at rated load, which adds to the enclosure's internal heat rise; factor that into the thermal coordination for the distribution board. Mounts on DIN rail, any position. The 2 MW width (36 mm) and 77 mm depth plus 70 mm installation depth mean it fits standard SENTRON distribution boards without crowding adjacent ways.","metaTitle":"Siemens 5SU1656-7KK40 SENTRON RCBO 40A Type C 6kA 1P+N","metaDescription":"Siemens SENTRON 5SU1656-7KK40 RCBO, 40A rated, Type C trip curve, 6kA breaking capacity per EN 60898, Type A fault current, 1P+N, 2 MW. Current production. Quoted 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":"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","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":"5SU1","Current / at AC / rated value":"40 A","Tripping characteristic class":"C","acc. to EN 60898 / rated value":"6 kA","For Testing Equipment / Minimum":"100 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":"300 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/9d6debd3c11c57e4dbc46483189aa2da.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=94614&mlfb=5SU1656-7KK40","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1656-7KK40/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SU1656-7KK40?","answer":"Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing confirmed at quote time."},{"question":"What is 5SU1656-7KK40's depth?","answer":"The depth is 77 mm, with an installation depth of 70 mm."},{"question":"What conductor sizes does 5SU1656-7KK40 accept?","answer":"Solid or stranded conductors from 0.75 mm² up to 35 mm²."},{"question":"Will 5SU1656-7KK40 drop into a panel specified around 5SL6563-7BB?","answer":"Both are 2-MW DIN-rail RCBOs in the SENTRON family, so the footprint is the same. The 5SU1656-7KK40 is a 1P+N Type A device rated 40 A Type C; the 5SL6563-7BB would need to be checked for its own ratings to confirm functional equivalence. No rewiring of the DIN rail or busbar system should be needed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU1656-7KK40","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/5SU1656-7KK40 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}}