{"product_id":"ngb3b040","title":"Siemens NGB3B040 - 40A, 3-Pole, Circuit Breaker","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Siemens NGB3B040 — a rugged 40A, 3-Pole Circuit Breaker designed to deliver dependable overcurrent protection in demanding electrical environments. With a true three-phase configuration, this breaker ensures all live conductors trip together, safeguarding motors, feeders, and control circuits across your panelboards, switchboards, and control panels.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eKey advantages you’ll notice in daily operation\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003e40A current rating:\u003c\/strong\u003e Precise overload protection for three-phase circuits, helping prevent wiring damage and equipment fault.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3-Pole design:\u003c\/strong\u003e Enables synchronized interruption of all three phases, ideal for motor control and three-phase power distribution.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIndustrial-grade reliability:\u003c\/strong\u003e Engineered for tough environments in industrial, commercial, and OEM applications where consistent protection matters.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFlexible application footprint:\u003c\/strong\u003e Suited for use in panelboards, switchboards, and control panels where compact, reliable protection is required.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eProven performance:\u003c\/strong\u003e Built to deliver stable operation under fault conditions, reducing downtime and helping maintain system integrity.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eIdeal applications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eMotor control centers and machine feeders in manufacturing facilities\u003c\/li\u003e \u003cli\u003eDistribution panels and power distribution units in commercial buildings\u003c\/li\u003e \u003cli\u003eOEM electrical assemblies that require robust, standardized protection\u003c\/li\u003e \u003cli\u003eSwitchboards and control panels where three-phase protection is essential\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eWhat problems it solves\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003ePrevents overloads from damaging conductors and connected equipment in three-phase circuits\u003c\/li\u003e \u003cli\u003eProvides coordinated protection for motors and heavy loads, helping minimize downtime from faults\u003c\/li\u003e \u003cli\u003eDelivers fast, reliable interruption to maintain safety and protect electrical distribution integrity\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eWhy choose this Siemens unit\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eTrusted Siemens engineering ensures consistent performance, compatibility with Siemens distribution hardware, and support across industrial and commercial installations\u003c\/li\u003e \u003cli\u003eThree-pole protection simplifies wiring and offers clear, reliable disconnect in three-phase systems\u003c\/li\u003e \u003cli\u003eDesigned with OEM requirements in mind, offering dependable protection without compromising on space or serviceability\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003ePractical tips for installation and use\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eEnsure alignment with your system’s three-phase load and conductor sizing to optimize protection levels\u003c\/li\u003e \u003cli\u003eDocument the 40A rating and three-pole configuration in your electrical drawings for future maintenance\u003c\/li\u003e \u003cli\u003eFollow best practices for panelboard and switchboard assembly to maintain clear protection paths and accessibility\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eChoose the Siemens NGB3B040 for reliable, three-phase protection that keeps critical systems running smoothly in industrial, commercial, and OEM environments. Its 40A, 3-pole configuration delivers precise protection where it matters most, helping you minimize downtime and safeguard essential equipment.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default","offer_id":46390604726434,"sku":"NGB3B040","price":347.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/circuit_breaker_generic_100cafa1-90ad-4d4b-b8cb-5153630d972e.png?v=1765377724","url":"https:\/\/www.ampstate.com\/products\/ngb3b040","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}