{"product_id":"eaton-hld3400-400a-600v-3-pole-circuit-breaker","title":"Eaton HLD3400 - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Eaton HLD3400 is a 400A, 600V, 3-pole molded case circuit breaker designed to safeguard your electrical distribution with precise, dependable protection. Built for panelboards and loadcenters, this breaker delivers reliable branch circuit overcurrent and short-circuit protection without compromising panel space or layout.\u003c\/p\u003e \u003ch3\u003eWhy the HLD3400 stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eCompact molded-case design\u003c\/strong\u003e optimizes panel space, making it easier to fit complex distribution schemes in tighter enclosures.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers stable, repeatable protection by combining a thermal element for sustained overloads with a magnetic element for fast short-circuit interruption.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThree-pole configuration\u003c\/strong\u003e provides coordinated protection across all three phases, essential for balanced three-phase systems.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-grade compatibility\u003c\/strong\u003e designed to align seamlessly with matching Eaton OEM load centers and panelboards for straightforward installation and reliable trip coordination.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile across settings\u003c\/strong\u003e suitable for residential, commercial, and light industrial applications where dependable overcurrent protection is critical.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical snapshot\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eManufacturer: Eaton\u003c\/li\u003e \u003cli\u003ePart number: HLD3400\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\u003ePoles: 3\u003c\/li\u003e \u003cli\u003eApplication: Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical benefits and use cases\u003c\/h3\u003e\n\u003cp\u003eIn a commercial panel or light-industrial distribution system, the HLD3400 acts as a reliable first line of defense against overloads and sudden faults. Its compact form helps maximize the usable space in main distribution panels, while the thermal-magnetic trip mechanism minimizes nuisance trips caused by minor temperature swings and transient surges. Ideal scenarios include:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eFeeding critical circuits in panelboards where space is at a premium\u003c\/li\u003e \u003cli\u003eProtection of three-phase loads in commercial equipment rooms\u003c\/li\u003e \u003cli\u003eSubpanel protection in light industrial installations\u003c\/li\u003e \u003cli\u003eReplacement or upgrade of legacy breakers within Eaton-compatible load centers\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eHow it supports safe, reliable operation\u003c\/h3\u003e\n\u003cp\u003eThe HLD3400’s protective performance translates to fewer unplanned outages and more stable electrical systems. Its coordinated trip behavior helps ensure that only the affected circuit opens during a fault, preserving service continuity on unaffected feeders. By pairing a robust 400 A rating with a 600 V capability, it’s well-suited for medium-scale distribution where space, reliability, and ease of installation matter most.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349605830818,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/eaton-hld3400-400-a-600-v-3-pole-circuit-breaker-ampstate-breakers-812.webp?v=1788690613","url":"https:\/\/www.ampstate.com\/products\/eaton-hld3400-400a-600v-3-pole-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}