{"product_id":"eaton-cutler-hammer-kd3400k-400a-3p-circuit-breaker","title":"Eaton Cutler-Hammer KD3400K 400A 3P Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Eaton Cutler-Hammer KD3400K is a purpose-built circuit breaker designed to deliver dependable protection for panelboards, load centers, and broader electrical distribution networks. This 3-pole, 400 A device is crafted for retrofit work and maintenance planning, offering a consistent part number that simplifies stocking, ordering, and service schedules across projects.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eKey specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Eaton Cutler-Hammer\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e KD3400K\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Circuit Breaker\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 400 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eWhere this breaker shines\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eIdeal for panelboards, load centers, and electrical distribution systems that demand robust overcurrent protection.\u003c\/li\u003e \u003cli\u003ePerfect for retrofit projects where maintaining the exact part number streamlines procurement, compatibility checks, and future maintenance.\u003c\/li\u003e \u003cli\u003eSuitable for three-phase power applications that require reliable, field-proven protection at the 400 A level.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eWhy choose the KD3400K from AmpState\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAvailability\u003c\/strong\u003e in AmpState’s catalog ensures you can source this specific model when a consistent part number matters for your project timelines.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCompatibility support\u003c\/strong\u003e is just a message away—our team can help you confirm fit for your panelboard or distribution system, minimizing downtime.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTrustworthy lineage\u003c\/strong\u003e—part of Eaton Cutler-Hammer’s proven protection lineup, designed to meet rigorous electrical codes and project requirements.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eUse cases and practical guidance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eIn construction or renovation, install the KD3400K where a 3-pole, 400 A breaker is specified to protect feeders and distribution circuits in industrial facilities, commercial buildings, or data-center enclosures.\u003c\/li\u003e \u003cli\u003eDuring maintenance planning, keep a spare KD3400K on hand to reduce equipment downtime when replacing a failed 3-pole breaker in mid-life panels.\u003c\/li\u003e \u003cli\u003eWhen coordinating with OEMs or facilities teams, the exact KD3400K part number helps maintain consistency across drawings, spare parts lists, and service records.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003ePractical installation tips\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eAlways verify that the panelboard or distribution device is listed for 3-pole, 400 A breakers of the KD family before installation.\u003c\/li\u003e \u003cli\u003eFollow manufacturer torque specifications and electrical codes to ensure secure connections and reliable tripping performance.\u003c\/li\u003e \u003cli\u003eCoordinate with AmpState to confirm compatibility and lead times if you’re matching a legacy installation or refreshing a retrofit plan.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eReady to secure dependable overcurrent protection with the KD3400K? Contact AmpState to confirm compatibility and place your order for this exact Eaton Cutler-Hammer part, keeping your electrical distribution ready for today’s demands and tomorrow’s improvements.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"AmpState","offers":[{"title":"Default Title","offer_id":46412466520226,"sku":"KD3400K","price":5746.0,"currency_code":"CAD","in_stock":true}],"url":"https:\/\/www.ampstate.com\/products\/eaton-cutler-hammer-kd3400k-400a-3p-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}