{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1646-6FP20","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1646-6FP20","canonicalUrl":"https://aoctrl.com/siemens/5SU1646-6FP20","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1646-6FP20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SU1646-6FP20 RCBO, 4-pole, 20 A rated at 30 °C, Type B tripping characteristic, 6 kA breaking capacity per EN 60898, 400 V AC, 50 Hz, 72 mm width (4 MW).","salesMarkdown":"## Siemens 5SU1646-6FP20 SENTRON RCBO — 4P, 20 A, Type B It operates at 400 V AC, 50 Hz, and carries a 6 kA breaking capacity per EN 60898 and IEC 60947-2. The 400 V AC rating across 4 poles means it can protect a three-phase plus neutral circuit, or be used in single-phase split configurations. The 50 Hz operating frequency is fixed — not suitable for 60 Hz systems without verifying the manufacturer's derating. Temperature derating is published: 20 A at 30 °C drops to 19.5 A at 40 °C, 18.9 A at 50 °C, and 17.8 A at 70 °C. If the distribution board is in a warm enclosure or adjacent to heat-generating equipment, use the 40 °C or 50 °C column for your continuous load calculation.","metaTitle":"Siemens 5SU1646-6FP20 SENTRON RCBO, 4P, 20A, Type B, 6kA","metaDescription":"Siemens 5SU1646-6FP20 SENTRON RCBO, 4-pole, 20A rated at 30°C, Type B tripping characteristic, 6kA breaking capacity per EN 60898. 72mm width, 4 MW. Active production. Available to","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Depth":"72 mm","Width":"72 mm","Height":"85 mm","Maximum":"70 °C","Minimum":"-40 °C","Halogen-Free":"No","Design Of Pole":"4P","Number Of Poles":"4","lifecycle_stage":"current","Mounting Position":"any","at AC rated value":"400 V","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Operating Frequency":"50 Hz","Product Designation":"RCBO","protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage Category":"III","Design Of The Product":"Instantaneous","Weight With Packaging":"505 g","at 30 °C rated value":"20 A","at 40 °C rated value":"19.5 A","at 45 °C rated value":"19.2 A","at 50 °C rated value":"18.9 A","at 55 °C rated value":"18.7 A","at 60 °C rated value":"18.4 A","at 70 °C rated value":"17.8 A","Energy Limitation Class":"1","For Testing Equipment Minimum":"195 V","Number Of Modular Width Units":"4","Position Of Power Supply Cord":"Either top or bottom","Tripping Characteristic Class":"B","Number Of Poles With Protection":"4","according to EN 60898 rated value":"6 kA","insulation voltage (Ui) rated value":"500 V","Supply Voltage Frequency Rated Value":"50 Hz","Surge Voltage Resistance Rated Value":"4 000 V","according to IEC 60947-2 rated value":"6 kA","Surge Current Resistance At (8/20) μS":"0.25 kA","Influence Of The Surrounding Temperature":"Max. 95% humidity","Type Of Voltage Of The Operating Voltage":"AC","Mechanical Service Life (Operating Cycles) Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/bed74928c9539d6c50f1eb1e06da07d1.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1438080&mlfb=5SU1646-6FP20","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1646-6FP20/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SU1646-6FP20?","answer":"6 kA rated value per EN 60898 and IEC 60947-2, sufficient for most residential and light commercial final circuits."},{"question":"Where can I buy 5SU1646-6FP20 and what is the lead time?","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":"What is the difference between 5SU1646-6FP20 and 5SY4301-7CV?","answer":"The 5SY4301-7CV is a single-pole MCB (miniature circuit breaker) with Type C characteristic, while the 5SU1646-6FP20 is a 4-pole RCBO with Type B characteristic and integral residual current protection. They are not direct substitutes — the RCBO adds RCD functionality and occupies 4 MW instead of 1."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU1646-6FP20","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/5SU1646-6FP20 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}}