{"product_id":"eaton-ld3400w-400a-600v-3-pole-bolt-on-circuit-breaker","title":"Eaton LD3400W - 400 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Eaton LD3400W is a 3‑pole, bolt‑on molded case circuit breaker engineered for stubborn reliability in protection-critical panels. With a robust 400 A rating and a 600 V capacity, it handles demanding branch circuit overcurrent and short‑circuit protection in panelboards and loadcenters, making it a smart choice for residential, commercial, and light industrial electrical systems.\u003c\/p\u003e \u003cp\u003eWhat sets the LD3400W apart is its combination of secure bolt‑on mounting and a thermal‑magnetic trip unit. The bolt‑on design delivers a rigid, vibration‑resistant bus connection that stays solid through ongoing operation and thermal cycling, reducing nuisance trips and maintenance headaches. The thermal‑magnetic trip mechanism provides stable, repeatable protection—responding quickly to short circuits while reliably distinguishing between temporary surges and dangerous faults.\u003c\/p\u003e \u003cp\u003eDesigned for compatibility and ease, this breaker works with matching OEM load centers and panelboards, ensuring a cohesive, dependable protection scheme across existing installations. Whether you’re upgrading an older panel or stocking parts for new builds, the LD3400W integrates smoothly with 3‑phase or single‑phase 600 V systems that require robust branch circuit protection.\u003c\/p\u003e \u003cp\u003eIdeal use scenarios include\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eUpgrading protective devices in commercial panelboards serving mechanical rooms, lighting, and office facilities\u003c\/li\u003e \u003cli\u003eProviding reliable circuit protection for light industrial equipment and small manufacturing lines\u003c\/li\u003e \u003cli\u003eReplacing worn or damaged breakers in residential or mixed-use buildings where panel longevity matters\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eKey benefits at a glance\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt‑on mounting\u003c\/strong\u003e for a rigid, vibration‑resistant connection that maintains performance over time\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal‑magnetic protection\u003c\/strong\u003e with predictable trip characteristics across varying loads and temperatures\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM‑compatible\u003c\/strong\u003e with matching load centers and panelboards for seamless installations\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3‑pole, 400 A, 600 V\u003c\/strong\u003e design ideal for 3‑phase distribution and high‑current circuits\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eTechnical snapshot\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eManufacturer: Eaton\u003c\/li\u003e \u003cli\u003ePart Number: LD3400W\u003c\/li\u003e \u003cli\u003eType: Thermal‑magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003eAmperage Rating: 400 A\u003c\/li\u003e \u003cli\u003eVoltage Rating: 600 V\u003c\/li\u003e \u003cli\u003eNumber of Poles: 3\u003c\/li\u003e \u003cli\u003eMounting Style: Bolt‑on\u003c\/li\u003e \u003cli\u003eApplication: Branch circuit overcurrent and short‑circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWho should consider the LD3400W? Electrical professionals building or maintaining panelboards in commercial facilities, contractors stocking up for service upgrades, and facility managers seeking durable, easy‑to‑install protection for critical circuits. If you need a dependable, high‑current breaker that stays secure in tough environments and pairs with standard load centers, the LD3400W is a practical, long‑term choice.\u003c\/p\u003e \u003cp\u003eInstallation and maintenance tips: ensure the target panelboard is listed for bolt‑on 400 A, 3‑pole devices and follow manufacturer torque specifications and safety protocols. Regularly inspect connections for signs of wear, and schedule periodic testing of protective devices as part of your electrical maintenance plan.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349632077986,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/eaton-ld3400w-400-a-600-v-3-pole-bolt-on-circuit-breaker-ampstate-342.webp?v=1788696420","url":"https:\/\/www.ampstate.com\/products\/eaton-ld3400w-400a-600v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}