{"product_id":"eaton-cutler-hammer-kd3400-400a-3p-600v-circuit-breaker","title":"Eaton Cutler-Hammer KD3400 400A 3P 600V Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eDesigned for everyday electrical work, the Eaton Cutler-Hammer KD3400 400A 3P 600V circuit breaker delivers dependable, precise circuit protection for panelboards, load centers, and electrical distribution systems. This unit is a smart choice for maintenance teams and panel builders who require an exact part-number match to keep service calls efficient and inventory accurate.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eDirect part-number match\u003c\/strong\u003e: KD3400 ensures exact fit, labeling, and compatibility—reducing downtime and mis-orders during maintenance or upgrades.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThree-pole, 400 A performance\u003c\/strong\u003e: Ideal for three-phase distribution where robust protection and reliable trip characteristics are essential.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e600 V maximum rating\u003c\/strong\u003e: Suitable for a wide range of commercial and light-industrial panel environments and electrical distribution setups.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eTrusted Eaton Cutler-Hammer lineage\u003c\/strong\u003e: Built for repeated switching and long-term reliability in demanding electrical distributions.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmpState availability\u003c\/strong\u003e: Ready to ship through AmpState to support fast procurement and stocking strategies.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cp\u003eUse the KD3400 in panelboards and load centers where a 3-pole, 400 A, 600 V device is required. It’s a practical solution for maintenance vans, service crews, and construction projects that demand exact part-number replacements to ensure compatibility with existing panels and documentation.\u003c\/p\u003e \u003ch3\u003eSpecifications at a glance\u003c\/h3\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 KD3400\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 \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 600 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApplications:\u003c\/strong\u003e Panelboards, Load Centers, Electrical Distribution\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAvailability:\u003c\/strong\u003e AmpState\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eCompatibility and installation tips\u003c\/h3\u003e\n\u003cp\u003eBefore purchasing, confirm that your panel accepts KD3400 devices and that the installation environment matches a 3-pole 400 A, 600 V rating. When replacing an old breaker, having the exact KD3400 part number on hand simplifies ordering, labeling, and warranty considerations. Keep a spare KD3400 on hand in your service fleet to minimize downtime during critical outages.\u003c\/p\u003e \u003cp\u003eAvailable from AmpState. Need help matching a part number or confirming compatibility? Message us and we’ll help you confirm fit, so you can proceed with confidence and speed.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"AmpState","offers":[{"title":"Default Title","offer_id":46410874159266,"sku":"KD3400","price":6822.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_83963f7f-600e-419f-90c6-e7677089642b.png?v=1765492973","url":"https:\/\/www.ampstate.com\/products\/eaton-cutler-hammer-kd3400-400a-3p-600v-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}