{"product_id":"eaton-kd3125y-125a-600v-3-pole-bolt-on-circuit-breaker","title":"Eaton KD3125Y - 125 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eEngineered by Eaton, the \u003cstrong\u003eKD3125Y\u003c\/strong\u003e is a \u003cstrong\u003e125 A, 600 V, 3-pole bolt-on molded case circuit breaker\u003c\/strong\u003e designed to protect branch circuits with precision in panelboards and load centers. Built for rugged reliability, it excels in residential, commercial, and light industrial environments where consistent protection and dependable operation matter most.\u003c\/p\u003e \u003ch2\u003eKey advantages\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBolt-on mounting\u003c\/strong\u003e delivers a rigid, vibration-resistant bus connection, reducing wear and ensuring stable current flow over time.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e provides stable, repeatable protection—responding to both overcurrent and short-circuit conditions with predictable behavior.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM compatibility\u003c\/strong\u003e designed to integrate seamlessly with matching Eaton OEM load centers and panelboards for streamlined installation and maintenance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFlexible 3-pole protection\u003c\/strong\u003e ideal for 3-phase distribution in commercial and light industrial settings, while also suitable for complex residential panel configurations when 3-phase is present.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eIdeal applications\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003ePrimary protection in electrical panelboards and load centers where reliable overcurrent and short-circuit protection is essential.\u003c\/li\u003e \u003cli\u003eNew installations and OEM replacements in residential, commercial, and light industrial projects requiring a robust 3-pole solution.\u003c\/li\u003e \u003cli\u003ePanel upgrades or expansions that demand a bolt-on molded case breaker with strong bus connection and predictable trip behavior.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eTechnical snapshot\u003c\/h2\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: KD3125Y\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: 125 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating\u003c\/strong\u003e: 600 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNumber of poles\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\u003eApplication\u003c\/strong\u003e: Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eWhy this breaker stands out\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eDurability in harsh environments thanks to a bolt-on design that secures a tight, low-resistance connection to the bus bars, minimizing thermal stress during surge events.\u003c\/li\u003e \u003cli\u003ePredictable protection curve with a thermal-magnetic mechanism, reducing nuisance trips while delivering quick response to genuine faults.\u003c\/li\u003e \u003cli\u003eClear path to reliable performance in panelboards and load centers that require exacting compatibility with Eaton OEM equipment.\u003c\/li\u003e \u003cli\u003eVersatility across applications—from compact residential panels to light industrial distribution—without compromising protection or ease of installation.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhether you're upgrading an existing panel or specifying gear for a new installation, the Eaton \u003cstrong\u003eKD3125Y\u003c\/strong\u003e delivers focused, long-lasting protection for your 3-phase distribution needs. Its combination of secure bolt-on mounting, stable thermal-magnetic protection, and OEM-compatible design makes it a practical, trustworthy choice for safeguarding electrical systems.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349626376354,"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_ea6ceef5-0888-4549-aafb-7d8240c3b558.png?v=1764151792","url":"https:\/\/www.ampstate.com\/products\/eaton-kd3125y-125a-600v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}