{"product_id":"nb345-flat-top-circuit-breaker","title":"NB345-FLAT-TOP | Circuit Breaker | 45A | 3-Pole | 240V","description":"\u003cdiv\u003e\n\u003cp\u003eIntroducing the \u003cstrong\u003eNB345-FLAT-TOP\u003c\/strong\u003e Circuit Breaker — a rugged, industrial-grade protection device designed for reliability in demanding electrical installations. This 3-pole unit delivers 45A of current at 240V, making it ideal for safeguarding multi‑phase motors, drives, and feeders in manufacturing, facilities, and OEM environments.\u003c\/p\u003e \u003cp\u003eThe flat-top \u003cstrong\u003eNB345-FLAT-TOP\u003c\/strong\u003e is engineered for compatibility with panels and enclosures that require a flat-top mount. Its design supports clean, secure installation in retrofit and replacement projects where matching specs matters most. When you’re upgrading or maintaining a distribution panel, this part reference helps ensure you get the right fit the first time.\u003c\/p\u003e \u003ch3\u003eKey specifications\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 45A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3‑Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 240V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eType and design:\u003c\/strong\u003e Industrial circuit breaker with flat-top geometry for compatible enclosures\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy it matters in the field\u003c\/h3\u003e\n\u003cp\u003eFor maintenance, retrofit, or replacement, a 3-pole 240V breaker like the \u003cstrong\u003eNB345-FLAT-TOP\u003c\/strong\u003e ensures all three phases trip together, protecting both equipment and personnel by preventing hazardous voltage imbalances. Its 45A rating aligns with mid-range loads commonly found on three-phase motors, conveyors, pumps, and HVAC systems, enabling safe interruption during faults without unnecessary nuisance tripping.\u003c\/p\u003e \u003ch3\u003eWho benefits most\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eMaintenance technicians replacing aging or damaged breakers in industrial panels\u003c\/li\u003e \u003cli\u003ePanel builders and electricians performing retrofits or upgrades to existing 3‑phase circuits\u003c\/li\u003e \u003cli\u003eOEMs integrating reliable protection for equipment racks, drives, and motor control centers\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical guidance for best results\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eAlways confirm \u003cstrong\u003efit and ratings\u003c\/strong\u003e before ordering. The \u003cstrong\u003eNB345-FLAT-TOP\u003c\/strong\u003e part number is the best reference for compatibility.\u003c\/li\u003e \u003cli\u003eMatch the breaker to your panel’s design—the flat-top format is key for proper seating and secure mounting in assemblies that specify this geometry.\u003c\/li\u003e \u003cli\u003eUse this breaker for discontinuing or protecting three‑phase circuits up to 240V, especially where a coordinated trip across all poles is required.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"AmpState","offers":[{"title":"Default Title","offer_id":46426434568354,"sku":"NB345-FLAT-TOP","price":2010.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_a085eff1-75dd-47ee-b131-4c8df8f0489b.png?v=1765492976","url":"https:\/\/www.ampstate.com\/products\/nb345-flat-top-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}