{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY6663-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY6663-7","canonicalUrl":"https://aoctrl.com/siemens/5SY6663-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY6663-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON miniature circuit breaker, 5SY6663-7, 4-pole 3P+N, tripping characteristic C, rated breaking capacity 6 kA per EN 60898 / 10 kA per IEC 60947-2, 400 V AC, 72 x 90 x 76 mm.","salesMarkdown":"The Siemens 5SY6663-7 is a 4-pole (3P+N) SENTRON miniature circuit breaker with tripping characteristic C, designed for final-circuit protection in industrial and commercial panels. It carries a dual-standard breaking capacity — 6 kA per EN 60898 and 10 kA per IEC 60947-2 — so it suits both residential-style distribution boards and industrial switchgear where higher fault currents are expected. ## What the ratings mean for the panel Tripping characteristic C means the magnetic trip operates at 5 to 10 times rated current — the standard choice for moderate inrush loads like small motors, lighting banks, and transformer primaries. The 6 kA rating under EN 60898 covers the typical domestic/commercial fault level; the 10 kA rating under IEC 60947-2 gives you headroom for industrial distribution where the prospective short-circuit current is higher. At DC (per IEC 60947-2) it handles 15 kA at up to 72 V, which matters for control-circuit or battery-backed bus protection. The 4-pole 3P+N design switches all three phases plus the neutral — required for TN-S or TT systems where the neutral must be interrupted for full isolation. Neutral conductor switching is confirmed, so this breaker can serve as the main isolator for a three-phase sub-distribution board. Rated for 400 V AC (multi-phase) and 440 V AC max, it fits standard 230/400 V grids across Europe and Asia. The wide ambient range (-40 °C to +75 °C) means it can live in unconditioned enclosures — rooftop plant rooms, unheated warehouses, or outdoor kiosks — without derating concerns. ## Panel integration and mounting Snaps onto standard DIN rail (35 mm) via the quick-assembly system — no tools needed for mounting or removal. Occupies 4 modular width units (72 mm total width). The combined terminal at top and bottom accepts both busbar and cable, which speeds up panel wiring. Mounting position is any, so it fits horizontal or vertical busbar arrangements without restriction. IP20 with connected conductors — standard for enclosed distribution boards. Degree of pollution 3 means it's rated for conductive pollution environments (typical industrial control panels). Sealable design allows the installer to lock the toggle position for lockout/tagout compliance.","metaTitle":"Siemens 5SY6663-7 SENTRON MCB, 4-pole C-curve, 6/10 kA","metaDescription":"Siemens 5SY6663-7 SENTRON miniature circuit breaker, 4-pole 3P+N, tripping characteristic C, breaking capacity 6 kA (EN 60898) / 10 kA (IEC 60947-2). Current production. Quoted to","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["4-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"72 mm","title":"5SY6663-7","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60898-1, IEC / EN 60947-2 / UL1077","description":"Miniature circuit breaker 400 V 6kA, 3+N-pole C, 63 A, D=70 mm","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"3P+N","Number Of Poles":"4","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","at AC rated value":"400 V","at DC rated value":"60 V","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Energy Limitation Class":"3","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Neutral Conductor Switching":"Yes","Number Of Modular Width Units":"4","Position Of Power Supply Cord":"Any","Tripping Characteristic Class":"C","according to EN 60898 rated value":"6 kA","according to IEC 60947-2 rated value":"10 kA","Influence Of The Surrounding Temperature":"max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C","Type Of Voltage Of The Operating Voltage":"AC","at DC according to IEC 60947-2 rated value":"15 kA","Value Range Of The Supply Voltage Frequency":"50/60 Hz","operating voltage at DC rated value maximum":"72 V","with multi-phase operation at AC rated value":"440 V","with single-phase operation at AC rated value":"440 V","at AC according to UL 1077 and CSA C22.2 No.235":"5 kA","vibration resistance according to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","Mechanical Service Life (Operating Cycles) Typical":"10 000","Product Extension Installable Supplementary Devices":"Yes","power loss [W] for rated value of the current at AC in hot operating state per pole":"6 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/3f86aac04ab7b9f9a32577d4b2be86bb.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=290309&mlfb=5SY6663-7"},"ai":{"faq":[{"question":"Who supplies 5SY6663-7 and how is it quoted for volume purchases?","answer":"The 5SY6663-7 is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time."},{"question":"What compliance documentation does Siemens provide for 5SY6663-7?","answer":"The 5SY6663-7 is certified to IEC/EN 60898-1, IEC/EN 60947-2, and UL 1077. It is halogen-free and silicon-free, which supports environmental compliance requirements."},{"question":"What is 5SY6663-7's listed depth?","answer":"The 5SY6663-7 has a depth of 76 mm (installation depth 70 mm), width 72 mm, and height 90 mm."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY6663-7","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/5SY6663-7 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}