{"product_id":"siemens-sentron-fuse-switch-disconnector-nh1-3-pole-250a","title":"Siemens Sentron Fuse switch disconnector, NH1, 3-pole, 250A","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe Siemens 3NP1143-1BC10 is a SENTRON 3NP1 series fuse-switch disconnector — a 3-pole device designed for wired busbar trunk systems (8US 60 mm). It is used for safe on-load disconnection and fuse-based circuit protection in main or sub-distribution boards. With a rated current of 250 A and capability for NH0 \/ NH1 fuses, it is suitable for industrial and commercial power distribution systems requiring reliable disconnection and short-circuit protection.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e3-pole fuse-switch disconnector for busbar trunk systems (8US 60 mm)\u003c\/li\u003e\n\u003cli\u003eCompatible with NH0 \/ NH1 fuses\u003c\/li\u003e\n\u003cli\u003eRated continuous current: 250 A (at 35 °C), up to 245 A (at 40 °C), 240 A (45 °C), 233 A (50 °C and above)\u003c\/li\u003e\n\u003cli\u003eRated operational current: 250 A (AC-21B \/ AC-22B \/ AC-23B depending on load)\u003c\/li\u003e\n\u003cli\u003eRated operational voltage (AC): up to 690 V AC; (DC) up to 440 V DC\u003c\/li\u003e\n\u003cli\u003eLet-through current (with closed switch): up to 32 kA\u003c\/li\u003e\n\u003cli\u003eConditional short-circuit current (Iq) with high-speed fuse activation: up to 80 kA\u003c\/li\u003e\n\u003cli\u003eFlat terminal \/ busbar connection — suitable for busbar-mounted installation\u003c\/li\u003e\n\u003cli\u003eSealable and lockable design for maintenance\/safety use\u003c\/li\u003e\n\u003cli\u003eCompact but heavy-duty construction — suitable for industrial distribution boards and switchgear\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 3NP1143-1BC10\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Family:\u003c\/strong\u003e SENTRON 3NP1 fuse-switch disconnectors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3 (three-pole)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuse Size Compatibility:\u003c\/strong\u003e NH0, NH1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContinuous Current Rating (Ie):\u003c\/strong\u003e 250 A (typical, at rated ambient temperature)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperational Current Ratings:\u003c\/strong\u003e AC-21B \/ AC-22B \/ AC-23B depending on load; DC-21B \/ DC-22B \/ DC-23B for DC circuits\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Operational Voltage:\u003c\/strong\u003e up to 690 V AC \/ 440 V DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLet-through Current (Closed Switch):\u003c\/strong\u003e up to 32 kA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConditional Short-Circuit Current (Iq) with Fuse Activation:\u003c\/strong\u003e 80 kA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Conductor Cross-Section (Main Contacts):\u003c\/strong\u003e 16 … 150 mm² (solid or stranded)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection Type:\u003c\/strong\u003e Flat \/ busbar terminals, suitable for busbar mounting (rail mounting on 60 mm busbar)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting System:\u003c\/strong\u003e Busbar trunk 8US 60 mm — horizontal or vertical mounting possible\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDegree of Pollution:\u003c\/strong\u003e 3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsulation Voltage (Ui):\u003c\/strong\u003e 690 V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImpulse Withstand Voltage (Uimp):\u003c\/strong\u003e 8 kV\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection Class (with cover \/ cable-lug cover):\u003c\/strong\u003e IP40\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmbient Operating Temperature Range:\u003c\/strong\u003e –25 °C … +55 °C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical Service Life (switching cycles):\u003c\/strong\u003e ~1,600 operations\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnclosure Dimensions (approx.):\u003c\/strong\u003e Height 306 mm × Width 183.7 mm × Depth 142.2 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNet Weight (approx.):\u003c\/strong\u003e 2.85 kg\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\u003eDesigned according to low-voltage switchgear standards for fuse-switch disconnectors\u003c\/li\u003e\n\u003cli\u003eSuitable for industrial and commercial main or sub-distribution boards\u003c\/li\u003e\n\u003cli\u003eSealable and lockable for maintenance, safety and compliance requirements\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eApplications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe 3NP1143-1BC10 is ideal as a main or branch-line fuse-switch disconnector in industrial and commercial electrical distribution systems. Typical applications include feeder protection in switchgear, sub-distribution boards, motor control centers, and commercial building distribution boards. It is suited for installations requiring robust fuse-based protection, busbar mounting, and safe disconnection under load, as well as for systems where maintenance isolation and lock-out capability are required.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":40775067172928,"sku":"3NP1143-1BC10","price":5409.52,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0556\/3662\/3424\/files\/3NP1143-1BC10.jpg?v=1764231968","url":"https:\/\/industrial.rubicon.tech\/products\/siemens-sentron-fuse-switch-disconnector-nh1-3-pole-250a","provider":"Rubicon Group Industrial Technology Shop","version":"1.0","type":"link"}