{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1656-0KK40","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1656-0KK40","canonicalUrl":"https://aoctrl.com/siemens/5SU1656-0KK40","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1656-0KK40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SU1 series RCBO, 1P+N, 40 A rated current, B tripping characteristic, 6 kA breaking capacity per EN 60898, 2-module width.","salesMarkdown":"## 40 A B-curve RCBO for final-circuit protection For motor or transformer circuits with higher inrush, a C or D curve would be the correct choice. Rated current is 40 A at 30 °C ambient, with a published derating table: 37.6 A at 40 °C, 36.4 A at 45 °C, 34.8 A at 50 °C, 32.4 A at 55 °C, 32.4 A at 60 °C, 30.8 A at 65 °C, and 29.2 A at 70 °C. If the distribution board sits in a warm machine cabinet or near heat sources, use the derated value for continuous load sizing — the 40 A label applies only at 30 °C ambient. Installation depth is 70 mm — verify enclosure depth against the back wall clearance, especially in shallow consumer units. Spring-cage terminals? The spec does not state terminal type, but the wire range is generous for a 40 A device — expect tunnel or screw terminals rated for the full cross-section. Designed to EN 60898 (rated breaking capacity 6 kA), overvoltage category III, energy limiting class 3. The product designation follows DIN EN 61346-2 and DIN EN 81346-2 (function code F). For pulsed DC or smooth DC fault currents, an A or B type RCD would be required. The manufacturer's standard compliance documentation (RoHS, REACH, CE) applies; specific declarations are available on request.","metaTitle":"Siemens SENTRON 5SU1656-0KK40 RCBO, 40 A B-curve, 6 kA","metaDescription":"Siemens SENTRON 5SU1656-0KK40 RCBO, 40 A rated, B tripping characteristic, 6 kA breaking capacity per EN 60898. 1P+N, 2-module width. Current production. Quoted to order against RF","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":"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":"AC","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":"B","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/8dd91feac122c2e70008811caa1604a4.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=431470&mlfb=5SU1656-0KK40","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1656-0KK40/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of 5SU1656-0KK40?","answer":"The depth is 77 mm, with an installation depth of 70 mm. The 2-module width is 36 mm, height 90 mm."},{"question":"What wire sizes does 5SU1656-0KK40 accept?","answer":"It accepts solid and stranded conductors from 0.75 mm² up to 35 mm², covering final-circuit wiring up to approximately 6 AWG."},{"question":"Where can I buy 5SU1656-0KK40?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ with your target quantity for a firm response."},{"question":"What is the difference between 5SU1656-0KK40 and 5SL6563-7BB?","answer":"The 5SL6563-7BB is a different Siemens RCBO variant — typically a different tripping characteristic or pole configuration. The 5SU1656-0KK40 is a 1P+N B-curve 40 A device; the 5SL series may differ in breaking capacity, width, or residual current type. Verify the specific ratings of the 5SL6563-7BB before substituting. The 5SU1656-0KK40 will not necessarily drop into a panel wired for the 5SL without checking terminal positions and busbar compatibility."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU1656-0KK40","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/5SU1656-0KK40 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}}