{"product_id":"nmx3b800","title":"Siemens NMX3B800 - 800A, 3-Pole, Circuit Breaker","description":"\u003cdiv\u003e\n\u003cp\u003eThe Siemens NMX3B800 delivers rugged, dependable overcurrent protection for demanding electrical systems. With an 800A current rating and a 3-pole configuration, this circuit breaker is purpose-built for three-phase installations in panelboards, switchboards, and control panels. It’s the robust main-feeder and protective solution you can trust in industrial environments, commercial facilities, and OEM applications where uptime and safety matter.\u003c\/p\u003e \u003ch2\u003eWhy the NMX3B800 stands out\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eHigh-current, three-phase protection:\u003c\/strong\u003e 800A rating paired with 3-pole construction supports large, three-phase circuits common in factories, processing plants, and heavy equipment applications.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile mounting for critical power distribution:\u003c\/strong\u003e Suitable for panelboards, switchboards, and motor control centers, enabling streamlined protection wherever three-phase power converges.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eReliable overcurrent protection:\u003c\/strong\u003e Designed to interrupt fault currents quickly and safely, helping minimize equipment damage and downtime during electrical faults.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-ready and field-friendly:\u003c\/strong\u003e Built to integrate with Siemens distribution ecosystems and adaptable to custom control panel builds and OEM solutions.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDurable industrial build:\u003c\/strong\u003e Engineered to withstand harsh environments and continuous operation in demanding industrial settings.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eIdeal applications\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eIndustrial facilities with heavy three-phase loads requiring robust main protection\u003c\/li\u003e \u003cli\u003eCommercial facilities that rely on reliable distribution panels and switchgear\u003c\/li\u003e \u003cli\u003eMotor control centers and process lines where high-current protection is essential\u003c\/li\u003e \u003cli\u003eOEM projects needing a dependable 800A, 3-pole circuit breaker as a core protection component\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eHow this solves real-world problems\u003c\/h2\u003e\n\u003cp\u003eIn any facility where a single fault can cascade into costly downtime, the NMX3B800 acts as the first line of defense. Its 3-pole design ensures synchronized interruption across all phases, preventing phase-to-phase faults from propagating. The 800A capacity covers large feeders and central distribution paths, reducing nuisance trips on normal startup surges while still delivering prompt protection against overloads and short circuits. This leads to improved system reliability, safer operation, and easier maintenance planning for engineering teams and electricians.\u003c\/p\u003e \u003ch2\u003ePractical guidance for deployment\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003ePair this breaker with compatible Siemens panelboards or switchboards designed for 3-phase, high-current protection to ensure optimal performance.\u003c\/li\u003e \u003cli\u003eUse as a main feeder protection point in motor control centers where large drives and processing equipment are centralized.\u003c\/li\u003e \u003cli\u003ePlan for routine inspection and torque checks on connections to maintain low-resistance, secure terminations in demanding environments.\u003c\/li\u003e \u003cli\u003eCoordinate replacement intervals with facility maintenance schedules to minimize unplanned downtime during upgrades or repairs.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eTechnical snapshot\u003c\/h2\u003e\n\u003cp\u003eProduct: Siemens NMX3B800 — 800A, 3-Pole Circuit Breaker\u003cbr\u003e\nApplication: Industrial, commercial, and OEM distribution panels, switchboards, and motor control centers\u003cbr\u003e\nFunction: Overcurrent protection with three-phase coverage for reliable electrical protection and safe operation\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default","offer_id":46390796583074,"sku":"NMX3B800","price":14.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/circuit_breaker_generic_29f542f0-2ff3-4bad-9b54-ea305bd6cdfd.png?v=1765379989","url":"https:\/\/www.ampstate.com\/products\/nmx3b800","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}