{"product_id":"eaton-hld3400w-400a-600v-3-pole-bolt-on-circuit-breaker","title":"Eaton HLD3400W - 400 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Eaton HLD3400W is a high-capacity, bolt-on molded case circuit breaker built to protect modern panelboards and loadcenters from overcurrent and short-circuit events. With a 400 A rating and 600 V capacity, this 3-pole unit is designed for robust three-phase distribution in residential, commercial, and light industrial environments.\u003c\/p\u003e \u003ch3\u003eWhy this breaker stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting:\u003c\/strong\u003e engineered for a rigid, vibration-resistant bus connection that stays put in busy electrical panels and in environments with vibration or movement.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit:\u003c\/strong\u003e provides stable, repeatable protection by combining precise thermal sensing with magnetic tripping for rapid response to high fault currents.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible design:\u003c\/strong\u003e designed to work seamlessly with matching Eaton OEM loadcenters and panelboards, ensuring reliable fit and coordinated protection.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile application:\u003c\/strong\u003e suitable for residential, commercial, and light industrial settings where dependable branch circuit protection and short-circuit mitigation are critical.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical specifications at a glance\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Eaton\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e HLD3400W\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 400 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage Rating:\u003c\/strong\u003e 600 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\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 \u003ch3\u003eIdeal use cases and practical scenarios\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eUpgrading or expanding large electrical panels in industrial or commercial spaces where 3-phase loads are common.\u003c\/li\u003e \u003cli\u003eInstalling in new-builds that require robust, compliant protection for critical equipment and distribution circuits.\u003c\/li\u003e \u003cli\u003eReplacing aging or incompatible breakers in OEM Eaton panelboards to maintain coordinated protection and trip characteristics.\u003c\/li\u003e \u003cli\u003eDeploying in environments with vibration—workshops, manufacturing floors, or equipment rooms—where a secure connection reduces nuisance trips.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhat problems this breaker solves\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003ePrevents overheating and damage from overcurrent on high-capacity circuits by using a reliable thermal element paired with magnetic trip for fast fault interruption.\u003c\/li\u003e \u003cli\u003eMinimizes panel movement-induced disturbances with a bolt-on design that secures a strong, low-resistance bus connection.\u003c\/li\u003e \u003cli\u003eSimplifies installation and maintenance by aligning with Eaton’s OEM loadcenter ecosystem, reducing the risk of compatibility issues.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical tips for best results\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eEnsure the bolt-on mounting is tightened according to your panel manufacturer’s guidelines to maximize bus stability and electrical integrity.\u003c\/li\u003e \u003cli\u003eConfirm that your panelboard or loadcenter is compatible with HLD-series breakers to maintain coordinated protection and expected trip curves.\u003c\/li\u003e \u003cli\u003eUse this 3-pole breaker in three-phase distribution circuits where balanced protection across all phases is essential for equipment longevity and safe operation.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eChoose the Eaton HLD3400W when you need a dependable, high-capacity protective solution that aligns with OEM panel systems and delivers consistent, real-world performance in demanding environments.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349605994658,"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_600febab-15b0-4f1b-8db4-623ebb291833.png?v=1764151079","url":"https:\/\/www.ampstate.com\/products\/eaton-hld3400w-400a-600v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}