{"product_id":"eaton-hkd3400t52w-400a-600v-3-pole-bolt-on-circuit-breaker","title":"Eaton HKD3400T52W - 400 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Eaton HKD3400T52W, a rugged 400 A, 600 V, 3-pole bolt-on molded case circuit breaker purpose-built for dependable branch circuit protection in panelboards and loadcenters. Designed to handle the demands of residential, commercial, and light industrial applications, it delivers consistent protection where it matters most while fitting seamlessly into Eaton-compatible systems.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting\u003c\/strong\u003e: delivers a rigid, vibration-resistant connection to the bus, reducing movement and maintaining reliable electrical contact over time.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e: combines time-delayed overload protection with instantaneous magnetic trip for fast, stable responses to both sustained overcurrents and short circuits.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible design\u003c\/strong\u003e: specifically engineered to integrate with matching Eaton loadcenters and panelboards, ensuring straightforward installation and reliable coordination with existing equipment.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHigh-capacity protection\u003c\/strong\u003e: 400 A at 600 V makes it suitable for main feeders and large branch-circuit protection in multi-series panel configurations.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eThe HKD3400T52W isn’t just a breaker—it’s a solved problem for complex electrical distributions. Its thermal-magnetic mechanism provides predictable trip behavior, helping prevent nuisance trips while preserving protection when it’s truly needed. The 3-pole configuration supports balanced protection across three-phase systems, which is essential for motors, compressors, and other inductive loads common in commercial and light industrial settings.\u003c\/p\u003e \u003cul\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\u003eType:\u003c\/strong\u003e Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e HKD3400T52W\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Eaton\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\u003eWho benefits most from this breaker? facilities managers, electrical contractors, and panel technicians seeking reliable, OEM-compatible protection that minimizes downtime and ensures protection margins across varied loads. It’s especially well-suited for upgrading or expanding panelboards in commercial spaces or light industrial environments where large feeders and robust fault protection are essential.\u003c\/p\u003e \u003cp\u003eIn practice, the HKD3400T52W delivers predictable protection curves, reduces the risk of nuisance trips in fluctuating load scenarios, and simplifies integration into existing Eaton ecosystems. If you’re stocking your service fleet or outfitting a new control panel, this bolt-on molded case breaker from Eaton provides the reliability, compatibility, and performance you expect from a trusted industry standard. Available through AmpState, it carries authentic Eaton engineering and is ready to support your electrical distribution needs.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349604946082,"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_e9c24fc1-d636-4d1e-bd03-a5b4852b00f5.png?v=1764151055","url":"https:\/\/www.ampstate.com\/products\/eaton-hkd3400t52w-400a-600v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}