{"product_id":"eaton-ld3400y-400a-600v-3-pole-bolt-on-circuit-breaker","title":"Eaton LD3400Y - 400 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Eaton LD3400Y is a robust 400 A, 600 V, 3-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Built for real-world electrical environments, this breaker provides consistent performance when it matters most—in residential, commercial, and light industrial settings—and is readily available through AmpState.\u003c\/p\u003e \u003ch2\u003eWhy the LD3400Y stands out\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting\u003c\/strong\u003e ensures a rigid, vibration-resistant bus connection, reducing connection wear and maintaining reliable circuit protection even in equipment with movement or vibration.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers stable, repeatable protection across a range of operating temperatures and fault current levels, helping to minimize nuisance trips while still interrupting dangerous faults quickly.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-ready compatibility\u003c\/strong\u003e is designed to pair seamlessly with matching Eaton OEM load centers and panelboards, ensuring proper fit, timing, and performance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatility for multiple applications\u003c\/strong\u003e suited for residential installations, commercial applications, and light industrial environments that require solid, dependable 3-pole protection for three-phase systems.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eTechnical specifications at a glance\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eManufacturer: Eaton\u003c\/li\u003e \u003cli\u003ePart Number: LD3400Y\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 \u003ch2\u003eIdeal use scenarios\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eNew panel installations or panel upgrades in homes, office buildings, retail spaces, and light manufacturing facilities that require 3-pole 400 A protection.\u003c\/li\u003e \u003cli\u003eRepairs or replacements in Eaton-based panelboards and load centers where a secure bolt-on solution is preferred for long-term reliability.\u003c\/li\u003e \u003cli\u003eEnvironments with mechanical vibration or equipment movement where a rigid bus connection helps maintain consistent protection performance.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eInstallation and compatibility guidance\u003c\/h2\u003e\n\u003cp\u003eFor best results, pair the LD3400Y with compatible Eaton load centers and panelboards. Follow standard electrical installation practices for bolt-on molded case breakers, ensuring proper alignment with bus bars and secure mounting to prevent any loosening over time. Use the data plate and OEM guidelines as your reference for torque and connection integrity to sustain optimal protection characteristics.\u003c\/p\u003e \u003ch2\u003eWhat you gain with the LD3400Y\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eReliable protection for critical circuits without frequent nuisance trips, thanks to the thermal-magnetic trip mechanism.\u003c\/li\u003e \u003cli\u003eLong-term durability in environments with vibration or movement, thanks to secure bolt-on mounting.\u003c\/li\u003e \u003cli\u003ePeace of mind from OEM-compatible design that ensures proper fit, trip coordination, and performance within Eaton systems.\u003c\/li\u003e \u003cli\u003eA scalable solution for three-phase distribution needs, suitable for a range of commercial and light industrial applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349632143522,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/eaton_breaker_and_panels_c71785c4-409d-4853-b3b4-5ded5b2fcc77.png?v=1764151988","url":"https:\/\/www.ampstate.com\/products\/eaton-ld3400y-400a-600v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}