{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM6021-1","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM6021-1","canonicalUrl":"https://aoctrl.com/siemens/5SM6021-1","factsUrl":"https://aoctrl.com/api/mcp/products/5SM6021-1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SM6021-1 arc-fault detection unit block, 16 A, 230 V AC, 2-pole (1P+N), DIN rail mount, IP20.","salesMarkdown":"The Siemens SENTRON 5SM6021-1 is an arc-fault detection unit block — an AFDD — designed to detect and interrupt dangerous series and parallel arcs in final circuits. This is the detection block itself, intended for use with a compatible MCB (5SY or 5SL4 series) or RCBO (5SU1 series) to form a complete arc-fault protective device. The 5SM6021-1 distinguishes between series arcs (an arc in the load circuit, e.g., a loose terminal or damaged cable) and parallel arcs (an arc line-to-neutral or line-to-ground). For series arcs, it detects and clears faults from 1 A up to 20 A. For parallel arcs, the detection range is 50 A to 500 A. The 1 A minimum series-arc threshold is critical: it catches low-energy arcing that a standard MCB might not trip on, which is the whole point of an AFDD. The 500 A parallel-arc ceiling covers high-energy faults up to the short-circuit capacity of the upstream breaker. The unit occupies 1 width unit (18 mm) on DIN rail, with a total width of 54 mm including the adjacent protective device it mounts to. Depth is 68.5 mm, height 95 mm, and installation depth 70 mm — standard for SENTRON modular devices. Mounting position is any orientation. The IP20 rating applies with the protective device and conductors connected, which is typical for enclosed distribution boards. The 2-pole (1P+N) design switches the line and switches or isolates the neutral.","metaTitle":"Siemens 5SM6021-1 SENTRON Arc Fault Detection Unit, 16A 230V","metaDescription":"Siemens SENTRON 5SM6021-1 arc-fault detection unit block, 16 A rated at 230 V AC, 2-pole 1P+N, DIN rail mount. Active production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Depth":"68.5 mm","Width":"54 mm","Height":"95 mm","Maximum":"75 °C","Minimum":"-40 °C","Rated Value":"50Hz","Halogen-Free":"Yes","Silicon-Free":"Yes","Mounting Type":"DIN rail (REG)","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","Product Designation":"Arc-fault detection unit block","at AC / rated value":"230 V","protection class IP":"IP20, with connected protective device and conductors","Overvoltage Category":"III","Design Of The Product":"for MCB 5SY, 5SL4 and RCBO 5SU1","Number Of Width Units":"1","Number Of Poles / Note":"1P+N","Position / Of Power Supply Cord":"Bottom","Switching Function / Short-Term Delayed":"No","operating current / at AC / rated value":"16 A","size of installation devices / acc. to DIN 43880":"1","Mechanical Service Life (Switching Cycles) / Typical":"10 000","Number Of Width Units / Of The Mountable Protective Device":"2","In The Event Of Electrical Arcs In Series With The Load / Maximum":"20 A","In The Event Of Electrical Arcs In Series With The Load / Minimum":"1 A","In The Event Of Electrical Arcs In Parallel With The Load / Maximum":"500 A","In The Event Of Electrical Arcs In Parallel With The Load / Minimum":"50 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$79.21","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=205899&mlfb=5SM6021-1","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM6021-1/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SM6021-1 and how do I get a price?","answer":"The 5SM6021-1 is sourced to order against an RFQ through independent distribution. Submit an RFQ for current pricing and availability."},{"question":"What is 5SM6021-1's listed depth?","answer":"The 5SM6021-1 has a listed depth of 68.5 mm, with an installation depth of 70 mm."},{"question":"Will 5SM6021-1 drop into a panel specified around 5SL6516-6YA?","answer":"Not without rewiring. The 5SM6021-1 is an arc-fault detection unit block that requires a compatible MCB (5SY or 5SL4) or RCBO (5SU1) to function. The 5SL6516-6YA is a standalone miniature circuit breaker, not an AFDD. They serve different protection functions and are not direct drop-in replacements."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM6021-1","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/5SM6021-1 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}}