{"product_id":"eaton-hld3400y-circuit-breaker","title":"Eaton | HLD3400Y | Circuit Breaker | 400A | 3-Pole | 600V","description":"\u003cdiv\u003e\n\u003cp\u003eThe Eaton HLD3400Y 400A, 3-Pole, 600V circuit breaker is a purpose-built solution for maintenance, retrofit, and replacement projects where exact specifications matter. Identified by the part number HLD3400Y, this unit is designed to fit Eaton-compatible systems and deliver reliable protection for demanding electrical setups.\u003c\/p\u003e \u003ch2\u003eKey specifications\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 400 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3-Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 600 V\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eWhy choose the HLD3400Y\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eExact spec alignment for maintenance, retrofit, and replacement—minimizing guesswork and downtime.\u003c\/li\u003e \u003cli\u003ePart-number clarity: using HLD3400Y as the reference ensures compatibility with matching Eaton panels and feeders.\u003c\/li\u003e \u003cli\u003eThree-pole design delivers balanced protection across three-phase systems, suitable for commercial and light-industrial applications.\u003c\/li\u003e \u003cli\u003eBuilt to handle higher-voltage distribution up to 600V, safeguarding connected equipment and maximizing circuit reliability.\u003c\/li\u003e \u003cli\u003eDirect replacement mindset: designed to integrate with existing Eaton protection schemes, making spares management simpler.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eIdeal use cases\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eMain or feeder protection in three-phase electrical panels for industrial facilities and manufacturing lines.\u003c\/li\u003e \u003cli\u003eRetrofit projects where current hardware requires an exact 400A, 3-pole, 600V specification.\u003c\/li\u003e \u003cli\u003eReplacement for worn or obsolete breakers in retrofit or service upgrade scenarios within Eaton-equipped installations.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eHow to verify fit and order confidently\u003c\/h2\u003e\n\u003cp\u003eBefore ordering, confirm that your panel or switchgear supports a 400A, 3-Pole, 600V protection device and that the form factor aligns with your existing mounting and bus configuration. The part number \u003cstrong\u003eHLD3400Y\u003c\/strong\u003e is the most reliable reference for compatibility, so cross-check it against your panel model and manufacturer documentation to ensure a seamless match.\u003c\/p\u003e \u003ch2\u003eWhat to expect after installation\u003c\/h2\u003e\n\u003cp\u003eWith the HLD3400Y installed, you’ll gain dependable overcurrent protection for critical three-phase circuits, helping prevent equipment damage from surges and faults. The 400A rating supports substantial load demands, while the 3-pole configuration ensures coordinated protection across all phases in your system. This makes it a practical, durable choice for ongoing reliability in demanding electrical environments.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Eaton","offers":[{"title":"Default Title","offer_id":46426465599650,"sku":"HLD3400Y","price":2010.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/eaton-hld3400y-circuit-breaker-400a-3-pole-600v-844.webp?v=1789582708","url":"https:\/\/www.ampstate.com\/products\/eaton-hld3400y-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}