{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4604-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4604-8","canonicalUrl":"https://aoctrl.com/siemens/5SY4604-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4604-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4604-8, miniature circuit breaker, 4-pole (3P+N), 4 A rated, D tripping characteristic, 10 kA (EN 60898) / 35 kA (IEC 60947-2) breaking capacity.","salesMarkdown":"## What this 4 A D-curve MCB is for The Siemens SENTRON 5SY4604-8 is a 4-pole (3P+N) miniature circuit breaker rated 4 A with a D tripping characteristic, designed for protecting circuits against overloads and short circuits in industrial control panels and mechanical engineering applications. The D-curve means it tolerates high inrush currents — typically used for motor, transformer, or welding equipment circuits where the startup surge would nuisance-trip a B or C curve breaker. The 4 A rating at 35 °C is the base; at elevated panel temperatures it derates to 3.71 A at 45 °C, 3.61 A at 50 °C, 3.5 A at 55 °C, and 3.39 A at 60 °C, so factor the ambient inside your enclosure when sizing. ## Breaking capacity and ratings Rated breaking capacity is 10 kA per EN 60898, which covers most commercial and light industrial distribution boards. For industrial applications where fault currents are higher, the IEC 60947-2 rating of 35 kA applies — that's the number to use when the breaker is specified into a machine control panel with a high-capacity transformer upstream. DC breaking capacity is 15 kA per IEC 60947-2, covering battery-backed or rectifier-fed circuits. ## Mounting and integration Snaps onto DIN rail via the quick assembly system, occupies 4 modular width units (72 mm wide). Mounting position is any, so it fits vertical or horizontal busbar arrangements. Installation depth is 70 mm behind the panel surface; overall depth is 76 mm. Combined terminals top and bottom accept the same conductor range — no special order for feed direction. Touch protection is built in, pollution degree 3 (conductive pollution typical in industrial enclosures).","metaTitle":"Siemens SENTRON 5SY4604-8 MCB, 4 A D-Curve 4-Pole, 10 kA","metaDescription":"Siemens SENTRON 5SY4604-8 miniature circuit breaker, 4 A, D tripping characteristic, 4-pole (3P+N), 10 kA per EN 60898, 35 kA per IEC 60947-2. Active production, available to order","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"76 mm","Width":"72 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"4","Type Of Voltage":"AC","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","acc. to IEC 81346-2":"F","at AC / rated value":"4 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Number Of Poles / Note":"3P+N","acc. to DIN EN 61346-2":"F","at 35 °C / rated value":"4 A","at 45 °C / rated value":"3.71 A","at 50 °C / rated value":"3.61 A","at 55 °C / rated value":"3.5 A","at 60 °C / rated value":"3.39 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"4","Tripping Characteristic Class":"D","acc. to EN 60898 / rated value":"10 kA","Position / Of Power Supply Cord":"Any","acc. to IEC 60947-2 / rated value":"35 kA","Product Feature / Touch Protection":"Yes","Supply Voltage Frequency / Rated Value":"50/60 Hz","Influence Of The Surrounding Temperature":"max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C","at DC / acc. to IEC 60947-2 / rated value":"15 kA","at AC / acc. to UL 1077 and CSA C22.2 No.235":"5 kA","vibration resistance / acc. to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","Product Function / Neutral Conductor Switching":"Yes","with multi-phase operation / at AC / rated value":"440 V","operating voltage / at DC / rated value / maximum":"72 V","with single-phase operation / at AC / rated value":"440 V","Mechanical Service Life (Operating Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=195249&mlfb=5SY4604-8","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY4604-8/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SY4604-8 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 this order code."},{"question":"What is 5SY4604-8's listed depth (76 mm) on this component line?","answer":"Overall depth is 76 mm; installation depth behind the panel face is 70 mm."},{"question":"What compliance documentation does Siemens provide for 5SY4604-8?","answer":"The breaker carries approvals per EN 60898 and IEC 60947-2 for breaking capacity ratings. It is halogen-free and silicon-free, with an IP20 protection class (with connected conductors). Specific RoHS/REACH/UL declarations are part of the standard SENTRON documentation package available on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4604-8","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/5SY4604-8 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}}