{"product_id":"siemens-circuit-breaker-1-pole-d-curve-4a-10ka","title":"Siemens Circuit breaker, 1-pole, D-Curve, 4A, 10kA","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe Siemens 5SY4104-8 is a single-pole miniature circuit breaker (MCB) from the SENTRON 5SY4 series, rated at 4 A with a D-curve tripping characteristic. It provides dependable overload and short-circuit protection for final circuits in residential, commercial, and industrial installations. Compact and durable, it features a 10 kA breaking capacity at 230\/400 V AC, 18 mm modular width, and simple DIN-rail mounting, making it ideal for space-constrained panels.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Current:\u003c\/strong\u003e 4 A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 1 (single-pole switching)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrip Curve:\u003c\/strong\u003e D-curve — handles high inrush loads such as motors and transformers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBreaking Capacity:\u003c\/strong\u003e 10 kA at 230\/400 V AC (EN 60898) \/ up to 35 kA (IEC 60947-2)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating Voltage:\u003c\/strong\u003e 230\/400 V AC | 72 V DC (per pole)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation Depth:\u003c\/strong\u003e 70 mm for DIN-rail or panel mounting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 18 mm (1 module width)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection Class:\u003c\/strong\u003e IP20 with connected conductors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminals:\u003c\/strong\u003e Screw-type terminals for solid or stranded conductors up to 35 mm²\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical Endurance:\u003c\/strong\u003e Approx. 10,000 switching operations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Series:\u003c\/strong\u003e SENTRON 5SY4 Miniature Circuit Breakers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eArticle Number:\u003c\/strong\u003e 5SY4104-8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Poles:\u003c\/strong\u003e 1 (P)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Current (In):\u003c\/strong\u003e 4 A (at 35 °C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Operational Voltage (Ue):\u003c\/strong\u003e 230\/400 V AC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Insulation Voltage (Ui):\u003c\/strong\u003e 440 V AC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Short-Circuit Breaking Capacity (Icn):\u003c\/strong\u003e 10 kA (EN 60898)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Ultimate Breaking Capacity (Icu):\u003c\/strong\u003e 35 kA (IEC 60947-2)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Loss per Pole:\u003c\/strong\u003e Approx. 1.2 W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConductor Size Range:\u003c\/strong\u003e 0.75 – 35 mm² (solid or stranded)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating Temperature Range:\u003c\/strong\u003e –40 °C to +70 °C (with derating)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection Class:\u003c\/strong\u003e IP20 (front and terminals)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions (W × H × D):\u003c\/strong\u003e 18 mm × 90 mm × 70 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e Approx. 0.15 kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e 35 mm DIN-rail (EN 60715)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Germany\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eCompliance \u0026amp; Certifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards:\u003c\/strong\u003e EN 60898-1 (for residential\/commercial use), IEC 60947-2 (for industrial applications)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCE Marking:\u003c\/strong\u003e Conforms to EU Low Voltage and Machinery Directives\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUL \/ CSA Approval:\u003c\/strong\u003e Compliant as a supplementary protector\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoHS Compliant:\u003c\/strong\u003e Free from hazardous substances since 2006\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWEEE Directive:\u003c\/strong\u003e EU take-back obligations apply\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eApplications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eIdeal for branch-circuit protection in residential, commercial, and industrial distribution boards, control panels, and machinery. Commonly used for lighting, socket circuits, and auxiliary loads requiring a D-curve breaker to handle equipment with high inrush currents (such as motors and transformers).\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":40775103152192,"sku":"5SY4104-8","price":467.49,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0556\/3662\/3424\/files\/5SY4104-8.jpg?v=1761131371","url":"https:\/\/industrial.rubicon.tech\/products\/siemens-circuit-breaker-1-pole-d-curve-4a-10ka","provider":"Rubicon Group Industrial Technology Shop","version":"1.0","type":"link"}