{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1656-6KK40","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1656-6KK40","canonicalUrl":"https://aoctrl.com/siemens/5SU1656-6KK40","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1656-6KK40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON RCBO, 5SU1656-6KK40, 2-pole 1P+N, 40 A, B-curve, Type A residual current, 6 kA per EN 60898 / 10 kA per IEC 60947-2, 2 MW, halogen-free.","salesMarkdown":"The Siemens 5SU1656-6KK40 is a SENTRON RCBO — a combined residual-current circuit breaker with overcurrent protection — rated 40 A at 30 °C, with a B-curve tripping characteristic and Type A residual-current sensitivity. It occupies 2 modular-width units (36 mm) on a DIN rail, with a depth of 77 mm and an installation depth of 70 mm. The 6 kA breaking capacity per EN 60898 (10 kA per IEC 60947-2) covers most residential and light-commercial fault levels. ## Ratings that matter for panel fit The 40 A rating derates with ambient temperature: 37.6 A at 40 °C, 36.4 A at 45 °C, 34.8 A at 50 °C, 32.4 A at 55–60 °C, 30.8 A at 65 °C, and 29.2 A at 70 °C. The 2-MW width (36 mm) and 70 mm installation depth mean it fits standard 18 mm-pitch DIN-rail enclosures without crowding adjacent breakers.","metaTitle":"Siemens 5SU1656-6KK40 SENTRON RCBO, 40A Type A, B-Curve, 6kA","metaDescription":"Siemens 5SU1656-6KK40 SENTRON RCBO, 40A rated, Type A residual current, B-curve, 6kA (EN 60898) / 10kA (IEC 60947-2). 2-module, halogen-free. 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","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":"40 A","protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage Category":"III","Design Of The Product":"Instantaneous","Residual Current Type":"A","Number Of Poles / Note":"1P+N","acc. to DIN EN 61346-2":"F","Energy Limitation Class":"3","Weight / With Packaging":"289 g","at 30 °C / rated value":"40 A","at 40 °C / rated value":"37.6 A","at 45 °C / rated value":"36.4 A","at 50 °C / rated value":"34.8 A","at 55 °C / rated value":"32.4 A","at 60 °C / rated value":"32.4 A","at 65 °C / rated value":"30.8 A","at 70 °C / rated value":"29.2 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":"10 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","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/7aedbf7ac138614ef36397cb7ae2079e.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=31476&mlfb=5SU1656-6KK40","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1656-6KK40/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SU1656-6KK40 and how do I get a price?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead-time estimate."},{"question":"What is the 5SU1656-6KK40's depth and width for panel layout?","answer":"Depth is 77 mm (installation depth 70 mm), width is 36 mm (2 modular units). It fits standard 18 mm-pitch DIN-rail enclosures with no overhang."},{"question":"What compliance documentation does the SENTRON 5SU1656-6KK40 carry?","answer":"It is designed to EN 60898 (6 kA) and IEC 60947-2 (10 kA), with overvoltage category III and pollution degree 2. Halogen-free and silicon-free construction are confirmed. The manufacturer provides standard CE, RoHS, and REACH declarations for the SENTRON series."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU1656-6KK40","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/5SU1656-6KK40 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}}