{"product_id":"siemens-miniature-circuit-breaker-3-pole-c-curve-400v-10ka-40a","title":"Siemens Miniature circuit breaker, 3-pole, C-curve, 400V, 10kA, 40A","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe Siemens 5SY4340-7 is a Siemens SENTRON 5SY4 miniature circuit breaker, 3-pole, 40 A, with tripping characteristic C and 10 kA breaking capacity. It delivers reliable overload and short-circuit protection for three-phase AC installations, making it suitable for distribution boards, motor circuits, machinery panels and general electrical installations requiring robust circuit protection.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThree-pole miniature circuit breaker (3P)\u003c\/li\u003e\n\u003cli\u003eRated current: 40 A\u003c\/li\u003e\n\u003cli\u003eC-characteristic — suitable for circuits with moderate inrush currents and mixed loads\u003c\/li\u003e\n\u003cli\u003eRated operational voltage: 400 V AC (also compatible with 230\/400 V systems)\u003c\/li\u003e\n\u003cli\u003eBreaking capacity: 10 kA\u003c\/li\u003e\n\u003cli\u003eScrew-type terminals for secure conductor connections\u003c\/li\u003e\n\u003cli\u003eModular width of 3 modules — compatible with standard DIN-rail mounting\u003c\/li\u003e\n\u003cli\u003eTouch-safe terminal design with halogen-free insulating materials\u003c\/li\u003e\n\u003cli\u003eSuitable for industrial and commercial power distribution and motor protection applications\u003c\/li\u003e\n\u003cli\u003eMechanical service life rated for long-term use with many switching cycles\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\u003eArticle Number:\u003c\/strong\u003e 5SY4340-7\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3 (3-Pole)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Current (In):\u003c\/strong\u003e 40 A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTripping Curve:\u003c\/strong\u003e C characteristic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Voltage (AC):\u003c\/strong\u003e 400 V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShort-Circuit Breaking Capacity (Icu):\u003c\/strong\u003e 10 kA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal Connection:\u003c\/strong\u003e Screw terminals for conductor cross-section 0.75 … 35 mm² (depending on wiring standard)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e DIN-rail (35 mm) installation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection Rating:\u003c\/strong\u003e IP20 (with connected conductors)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical Durability:\u003c\/strong\u003e Approx. 10,000 switching cycles (typical for 5SY4 series)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating Voltage Frequency:\u003c\/strong\u003e 50 \/ 60 Hz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePollution Degree \/ Overvoltage Category:\u003c\/strong\u003e Pollution degree 3, Overvoltage category III\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmbient Operating Temperature (standard):\u003c\/strong\u003e –40 °C to +70 °C (depending on installation environment) — typical for 5SY4 series\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\u003ePart of Siemens SENTRON 5SY4 miniature circuit breaker family\u003c\/li\u003e\n\u003cli\u003eManufactured to comply with international standards for low-voltage circuit protection devices\u003c\/li\u003e\n\u003cli\u003eSuitable for use in residential, commercial and industrial installations where reliable branch-circuit protection is required\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eApplications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe 5SY4340-7 is well suited for protecting three-phase branch circuits in distribution boards, machine control panels, motor feeders, lighting and power circuits, or other industrial installations where a 40 A protection level is needed. Its robust design and modular form factor make it appropriate for both new installations and retrofit applications in commercial or industrial electrical systems.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":40775042433088,"sku":"5SY4340-7","price":1474.92,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0556\/3662\/3424\/files\/5SY4340-7.jpg?v=1764672795","url":"https:\/\/industrial.rubicon.tech\/products\/siemens-miniature-circuit-breaker-3-pole-c-curve-400v-10ka-40a","provider":"Rubicon Group Industrial Technology Shop","version":"1.0","type":"link"}