{"product_id":"siemens-miniature-circuit-breaker-d-70mm-3-pole-400v-10ka-40a","title":"Siemens Miniature circuit breaker, D, 70mm, 3-pole, 400V, 10kA, 40A","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe Siemens 5SY4340-8 is a 3-pole miniature circuit breaker (MCB) designed for industrial low-voltage distribution. It features the D-characteristic tripping curve, is rated at 40 A and supports up to 400 V AC with a breaking capacity of 10 kA, all packaged in a compact 70 mm installation depth design.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e3-pole design (3P) providing full three-phase protection\u003c\/li\u003e\n\u003cli\u003eRated current: 40 A with D-characteristic trip curve—suitable for circuits with high inrush currents\u003c\/li\u003e\n\u003cli\u003eHigh breaking capacity: up to 10 kA at 400 V AC\u003c\/li\u003e\n\u003cli\u003eCompact depth of 70 mm, aiding installation in space-restricted distribution boards\u003c\/li\u003e\n\u003cli\u003ePart of the SENTRON 5SY4 series of circuit breakers—designed for reliable protection in industrial systems\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 Siemens SENTRON 5SY4 Miniature Circuit Breakers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eArticle Number:\u003c\/strong\u003e 5SY4340-8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Poles:\u003c\/strong\u003e 3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTripping Characteristic:\u003c\/strong\u003e D\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Current (In):\u003c\/strong\u003e 40 A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Operational Voltage:\u003c\/strong\u003e 400 V AC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Short-Circuit Breaking Capacity (Icn):\u003c\/strong\u003e 10 kA at 400 V AC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Depth:\u003c\/strong\u003e 70 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical Service Life (Typical):\u003c\/strong\u003e 10,000 operations\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDegree of Pollution:\u003c\/strong\u003e 3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOvervoltage Category:\u003c\/strong\u003e III\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight (Approx.):\u003c\/strong\u003e 0.48 kg (≈ 480 g)\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\u003eCompliant with IEC\/EN standards for miniature circuit breakers (e.g., IEC 60898-1, IEC 60947-2)\u003c\/li\u003e\n\u003cli\u003eDesigned and manufactured according to Siemens standard for industrial protection devices\u003c\/li\u003e\n\u003cli\u003eRoHS compliant and suitable for global low-voltage distribution applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eApplications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe 5SY4340-8 is ideal for industrial and commercial electrical distribution boards where robust protection is required for branch circuits with high switching inrush (e.g., motor loads, transformers). Its high breaking capacity, D-curve characteristic and compact 70 mm depth make it suitable for installations where space is limited but high performance is needed.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":40775096467520,"sku":"5SY4340-8","price":2241.27,"currency_code":"ZAR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0556\/3662\/3424\/files\/5SY4340-8.jpg?v=1761750965","url":"https:\/\/industrial.rubicon.tech\/products\/siemens-miniature-circuit-breaker-d-70mm-3-pole-400v-10ka-40a","provider":"Rubicon Group Industrial Technology Shop","version":"1.0","type":"link"}