{"product_id":"b340","title":"Siemens B340 - 40A, 3-Pole, Circuit Breaker","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Siemens B340—a robust 40A, 3-Pole Circuit Breaker designed to safeguard three-phase power systems in demanding environments. Built for industrial, commercial, and OEM applications, it provides dependable overcurrent protection in distribution panels and motor control centers.\u003c\/p\u003e \u003cp\u003eKey capabilities at a glance:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003e40A current rating\u003c\/strong\u003e—protects feeders, motors, and downstream equipment from overloads and faults.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3-Pole design\u003c\/strong\u003e—ensures synchronized disconnection across all three phases for balanced protection in three-phase circuits.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile deployment\u003c\/strong\u003e—suited for panelboards, switchboards, and control panels, enabling flexible integration into existing gear and Siemens-compatible systems.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eReliable performance\u003c\/strong\u003e—built to endure industrial and commercial settings where consistent protection matters.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhy this matters: In three-phase systems, an overload on one phase can cascade into costly downtime or equipment damage. The B340 interrupts all live conductors promptly, helping you minimize risk and keep operations moving smoothly.\u003c\/p\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003ePanelboards and switchboards in manufacturing facilities\u003c\/li\u003e \u003cli\u003eMotor control centers requiring coordinated protection for three-phase loads\u003c\/li\u003e \u003cli\u003eOEM equipment where a compact, reliable 3-pole breaker is needed\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhat to expect in practice: easy replacement in Siemens-compatible setups, straightforward protection of feeders, and protection that aligns with standard electrical practices. By choosing the B340, you’re investing in a trusted solution that supports safety standards and uptime goals.\u003c\/p\u003e \u003ch3\u003eWho should consider the Siemens B340\u003c\/h3\u003e\n\u003cp\u003eElectrical contractors, facility managers, and system integrators responsible for distribution panels and motor control centers will appreciate its 40A rating and three-pole protection. It pairs well with other Siemens components to support cohesive, reliable electrical protection strategies.\u003c\/p\u003e \u003ch3\u003ePractical tips for use\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eConfirm your system is a three-phase configuration to fully leverage the 3-pole design.\u003c\/li\u003e \u003cli\u003eMatch the 40A rating with your load calculations to ensure optimal protection without nuisance trips.\u003c\/li\u003e \u003cli\u003ePlan for coordinated protection with upstream and downstream devices to optimize protection schemes in your panel or MCC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default","offer_id":46390525264034,"sku":"B340","price":137.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/circuit_breaker_generic_4ce6d44f-62da-4fe5-aea7-3794c2ea7aef.png?v=1765376679","url":"https:\/\/www.ampstate.com\/products\/b340","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}