{"product_id":"siemens-neb3b040b-40a-600v-3-pole-bolt-on-circuit-breaker","title":"Siemens NEB3B040B - 40 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Siemens NEB3B040B is a rugged 40A, 600V, 3-pole bolt-on molded case circuit breaker designed to safeguard distribution panels with precision and confidence. Built for dependable branch circuit overcurrent and short-circuit protection, this unit is purpose‑built for consistent performance in panelboards and loadcenters across residential, commercial, and light industrial environments.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting:\u003c\/strong\u003e A rigid, vibration-resistant bus connection that stays tight through operation, vibration, and routine panel movements—minimizing the risk of loose connections and intermittent trips.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit:\u003c\/strong\u003e Combines thermal and magnetic protection to deliver stable, repeatable trip characteristics across a wide range of loads and temperatures, reducing nuisance tripping and ensuring reliable protection when it matters most.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3-pole, 40A, 600V design:\u003c\/strong\u003e Suitable for 3-phase distribution in small to mid-size installations, ideal for protecting motor starts, lighting circuits, and other branch circuits in both commercial spaces and light industrial setups.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM panel compatibility:\u003c\/strong\u003e Specifically engineered to pair with Siemens OEM loadcenters and panelboards, ensuring a seamless fit, consistent mounting geometry, and aligned trip curves for coordinated protection.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile applications:\u003c\/strong\u003e From retrofit projects in existing panelrooms to new installations in service panels, this breaker delivers reliable protection for multiple circuit types within a single, compact unit.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eWhy choose the Siemens NEB3B040B?\u003c\/strong\u003e It isn’t just about rating—it's about dependable protection that remains consistent under real-world conditions. The bolt-on installation provides a sturdier bus connection than plug-on alternatives, especially in panels subject to vibration or movement. The integrated thermal-magnetic trip mechanism responds quickly to short circuits while smoothing out temperature-related drifts, helping you maintain safe, protected electrical systems with fewer interruptions.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eTechnical snapshot\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Siemens\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e NEB3B040B\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage Rating:\u003c\/strong\u003e 40A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage Rating:\u003c\/strong\u003e 600V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNumber of Poles:\u003c\/strong\u003e 3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting Style:\u003c\/strong\u003e Bolt-on\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhether you’re upgrading a panel to handle higher demand, wiring a new 3-phase distribution layout, or replacing an aging breaker in a Siemens system, the NEB3B040B offers precise protection, dependable mounting, and seamless compatibility with Siemens loadcenters. It’s a practical, efficient choice for reliable electrical distribution in the spaces that keep your operations running smoothly.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355136544930,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens_breaker_and_panel_0771acb6-51b6-4348-92a4-9daa900989dd.png?v=1764689542","url":"https:\/\/www.ampstate.com\/products\/siemens-neb3b040b-40a-600v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}