{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1656-1KK20","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1656-1KK20","canonicalUrl":"https://aoctrl.com/siemens/5SU1656-1KK20","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1656-1KK20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SU1656-1KK20, RCBO, 2-pole 1P+N, 20 A (30 °C), C characteristic, 6 kA (EN 60898), 230/240 V AC, halogen-free, IP20.","salesMarkdown":"The Siemens 5SU1656-1KK20 is a 2-pole (1P+N) RCBO from the SENTRON 5SU1 series, combining overcurrent and residual current protection in a single 36 mm wide module. Rated 20 A at 30 °C with a C tripping characteristic, it breaks fault currents up to 6 kA per EN 60898 at 230/240 V AC. The residual current element is type AC, covering sinusoidal AC fault currents. This is the instantaneous (non-time-delayed) version, so it trips without intentional delay on earth faults — suitable for circuits where selectivity with upstream RCDs is not required. Rated current drops with ambient temperature inside the panel: 18.8 A at 40 °C, 18.2 A at 45 °C, 17.4 A at 50 °C, 16.2 A at 55 °C and 60 °C, 15.4 A at 65 °C, and 14.6 A at 70 °C. Supply can enter from the top or bottom — no mandatory orientation.","metaTitle":"Siemens 5SU1656-1KK20 SENTRON RCBO, 2P 20A C-curve, 6kA","metaDescription":"Siemens SENTRON 5SU1656-1KK20 RCBO, 2-pole 1P+N, 20 A rated at 30 °C, C characteristic, 6 kA breaking capacity per EN 60898, 230/240 V AC. Active production. Sourced to order.","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","at 30 Cel":"20 A","at 40 Cel":"18.8 A","at 45 Cel":"18.2 A","at 50 Cel":"17.4 A","at 55 Cel":"16.2 A","at 60 Cel":"16.2 A","at 65 Cel":"15.4 A","at 70 Cel":"14.6 A","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"2","Type Of Voltage":"AC","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":"230/240 V","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","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":"15 kA","Product Feature / Touch Protection":"Yes","Supply Voltage Frequency / Rated Value":"50 Hz","Tripping Residual Current / Rated Value":"300 mA","operating current / at AC / rated value":"20 A","Influence Of The Surrounding Temperature":"Max. 95% humidity","Surge Current Resistance / At (8/20) μS":"1 kA","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/fd08bfe0a0c831920622b3b9cf742cb7.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=125094&mlfb=5SU1656-1KK20","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1656-1KK20/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of the 5SU1656-1KK20?","answer":"The RCBO is rated for 6 kA breaking capacity according to EN 60898 at 230/240 V AC."},{"question":"Where can I buy the Siemens 5SU1656-1KK20?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"Will the 5SU1656-1KK20 drop into a panel specified around 5SU9354-7KK16 without rewiring?","answer":"Both are 2-pole (1P+N) SENTRON RCBOs with the same 36 mm width and DIN-rail mount, so mechanical fit is the same. However, the 5SU9354-7KK16 has different ratings (check its specific current and characteristic), so verify the circuit requirements before substitution."},{"question":"What compliance documentation does Siemens provide for 5SU1656-1KK20?","answer":"The brand provides RoHS and REACH declarations as standard. The RCBO is designed to EN 60898 and carries CE marking for the European market."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU1656-1KK20","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/5SU1656-1KK20 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}}