{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1656-0KK20","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1656-0KK20","canonicalUrl":"https://aoctrl.com/siemens/5SU1656-0KK20","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1656-0KK20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON RCBO, 2-pole (1P+N), B-curve, 20 A rated at 30 °C, 30 mA AC type residual current, 6 kA (EN 60898) / 15 kA (IEC 60947-2), 2 MW wide, IP20.","salesMarkdown":"## RCBO for final-circuit protection with combined overcurrent and residual current Rated 20 A at 30 °C, it protects final circuits against overload, short-circuit, and earth faults in one unit — saving a DIN-rail position versus separate MCB + RCCB. The 30 mA AC-type residual current detection handles sinusoidal earth faults, the most common type in residential and light commercial installations. The higher 15 kA rating under IEC 60947-2 provides additional fault-current headroom for industrial distribution boards where prospective short-circuit currents may exceed 6 kA. ## Thermal derating and mounting flexibility Rated current is temperature-dependent: 20 A at 30 °C, derating to 18.8 A at 40 °C, 17.4 A at 50 °C, 16.2 A at 60 °C, and 14.6 A at 70 °C. In a crowded enclosure with elevated ambient, apply the derated value — the 40 °C figure (18.8 A) is the practical design limit for most panel environments. The 2 MW (36 mm) width matches standard SENTRON modular spacing; depth is 77 mm, installation depth 70 mm. Halogen-free and silicon-free construction suits environments sensitive to outgassing, such as clean rooms or telecom shelters.","metaTitle":"Siemens 5SU1656-0KK20 SENTRON RCBO, 2-pole B-curve 20 A, 30","metaDescription":"Siemens 5SU1656-0KK20 SENTRON RCBO, 2-pole (1P+N), B-curve, 20 A rated at 30 °C, 30 mA AC type residual current. Breaking capacity 6 kA per EN 60898, 15 kA per IEC 60947-2. Current","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","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"2","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","acc. to IEC 81346-2":"F","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","Residual Current Type":"AC","Number Of Poles / Note":"1P+N","acc. to DIN EN 61346-2":"F","Energy Limitation Class":"3","Weight / With Packaging":"281 g","at 30 °C / rated value":"20 A","at 40 °C / rated value":"18.8 A","at 45 °C / rated value":"18.2 A","at 50 °C / rated value":"17.4 A","at 55 °C / rated value":"16.2 A","at 60 °C / rated value":"16.2 A","at 65 °C / rated value":"15.4 A","at 70 °C / rated value":"14.6 A","Number Of Modular Width Units":"2","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":"15 kA","Product Feature / Touch Protection":"Yes","Tripping Fault Current / Rated Value":"300 mA","Supply Voltage Frequency / Rated Value":"50 Hz","Influence Of The Surrounding Temperature":"Max. 95% humidity","Surge Current Resistance / At (8/20) μS":"1 kA","operational current / at AC / rated value":"20 A","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/406c365b34b0e394fa5f0cc9aa9771fa.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=211087&mlfb=5SU1656-0KK20","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1656-0KK20/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU1656-0KK20","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/5SU1656-0KK20 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}}