{"product_id":"eaton-hkd3300-300a-600v-3-pole-circuit-breaker","title":"Eaton HKD3300 - 300 A, 600 V, 3-Pole Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Eaton HKD3300 — a rugged 3-pole molded case circuit breaker engineered to deliver dependable branch-circuit overcurrent and short-circuit protection in panelboards and load centers. With a 300A rating at up to 600V, this device is built to handle demanding commercial and light industrial environments while remaining a reliable fit in residential service upgrades where 3-phase protection is required.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eWhy the HKD3300 stands out\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eCompact molded-case design\u003c\/strong\u003e optimizes panel space and simplifies installation, making it an ideal upgrade or retrofit for existing panels without compromising circuit capacity.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e combines a bimetal thermal element with a magnetic trip, delivering \u003cem\u003estable, repeatable protection\u003c\/em\u003e against both overloads and short circuits across varying loads and temperatures. This minimizes nuisance trips while maintaining fast response to dangerous faults.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3-pole configuration\u003c\/strong\u003e is purpose-built for 3-phase systems, providing coordinated protection across all phases in commercial and light-industrial applications.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM compatibility\u003c\/strong\u003e designed to align with matching Eaton OEM load centers and panelboards, ensuring seamless integration and reliable performance from the moment of installation.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile applicability\u003c\/strong\u003e suitable for residential, commercial, and light-industrial settings, making it a practical choice for new builds, upgrades, or service panel refreshes.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eIdeal use cases\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eMain or feeder protection in commercial load centers and Eaton-compatible panelboards\u003c\/li\u003e \u003cli\u003eUpgrading service panels that require robust 3-phase protection with a compact footprint\u003c\/li\u003e \u003cli\u003e retrofit projects where space is at a premium but 600V systems and 3-pole protection are needed\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eTechnical specifications at a glance\u003c\/strong\u003e\u003c\/p\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 HKD3300\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 300A\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\u003eApplication:\u003c\/strong\u003e Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003ePractical tips for use and optimization\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eEnsure your panelboard is compatible with 600V and designed for a 3-pole HKD-series breaker to maintain proper clearance and safe operation.\u003c\/li\u003e \u003cli\u003eWhen replacing an existing breaker, verify that the new HKD3300 matches the OEM panel’s specifications to preserve coordination and trip performance.\u003c\/li\u003e \u003cli\u003eInspect mounting and terminal torque during installation to ensure reliable electrical contact and long-term stability in environments with vibration or temperature changes.\u003c\/li\u003e \u003cli\u003ePair this breaker with appropriately rated conductors and devices in the same system to maintain coordinated protection across all phases.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eThe Eaton HKD3300 is more than a switch—it's a carefully engineered protection solution that prioritizes precise trip performance, panel efficiency, and dependable operation in real-world electrical systems. For projects requiring robust 3-phase protection with a compact footprint and OEM-compatible integration, the HKD3300 delivers clear, practical value from day one.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349603668130,"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_7be427f3-a583-42f8-a8f6-18b5c7532c2f.png?v=1764151032","url":"https:\/\/www.ampstate.com\/products\/eaton-hkd3300-300a-600v-3-pole-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}