{"product_id":"eaton-hkd3125x-125a-600v-3-pole-circuit-breaker","title":"Eaton HKD3125X - 125 A, 600 V, 3-Pole Circuit Breaker | AmpState","description":"\u003cdiv\u003eEaton HKD3125X is a compact, reliable three-pole molded case circuit breaker designed to protect branch circuits against overcurrent and short circuits in panelboards and load centers. With a 125 A rating and a 600 V maximum, it delivers targeted protection for commercial, light industrial, and residential distributions where space and performance matter. What makes the HKD3125X stand out\n- Space-efficient molded case design: Its compact footprint helps maximize panel density, making it easier to fit multiple circuits into a single panelboard without compromising protection.\n- Thermal-magnetic trip unit: The combination of thermal overload sensing and magnetic instantaneous trip provides stable, repeatable protection. This means fewer nuisance trips and a fast, decisive response to short circuits.\n- Three-pole, three-phase readiness: Ideal for protecting 3-phase distribution circuits, enabling clean, balanced protection for commercial and light industrial systems.\n- OEM-compatible fit: Engineered to work seamlessly with matching Eaton OEM load centers and panelboards, ensuring reliable mechanical and electrical compatibility.\n- Strong performance for everyday environments: Built to handle typical residential, commercial, and light industrial wiring scenarios where dependable branch circuit protection is essential. Who this is for\n- Facility managers and installers seeking a compact, high-reliability breaker for panel upgrades or new installations.\n- Electrical contractors working with Eaton loadcenters and panelboards who value a confirmed fit and predictable trip behavior.\n- Systems in light commercial or industrial settings that require robust three-pole protection without sacrificing panel space. Practical usage and scenarios\n- Residential-adjacent commercial spaces: Protect multi-wire branch circuits feeding HVAC, lighting, and auxiliary systems in a compact enclosure.\n- Light industrial distributions: Safeguard three-phase feeders and branch circuits in small to mid-size facilities where space is at a premium.\n- Panel consolidation projects: Replace legacy breakers with a molded case option that offers stable protection and easier maintenance. How it compares to alternatives\n- Compared with smaller single-pole devices, the HKD3125X provides coordinated three-pole protection for balanced three-phase systems, minimizing the risk of neutral and phase imbalances.\n- Its molded case design offers a tighter, more durable form factor than many generic breakers, paired with a thermal-magnetic trip that delivers accurate protection without frequent recalibration or nuisance trips. Technical specifications at a glance\n- Manufacturer: Eaton\n- Part Number: HKD3125X\n- Type: Thermal-magnetic molded case circuit breaker\n- Amperage Rating: 125 A\n- Voltage Rating: 600 V\n- Number of Poles: 3\n- Application: Branch circuit overcurrent and short-circuit protection Installation and maintenance tips\n- Ensure the breaker is matched to your panelboard\/loadcenter (OEM compatibility) to maintain proper fit and protection.\n- Periodically inspect terminals for tightness and signs of wear, and replace if you notice overheating or discoloration.\n- Follow applicable electrical codes and manufacturer guidelines during installation, testing, and commissioning. With the Eaton HKD3125X, you get a purpose-built, space-conscious solution that doesn’t force you to compromise on protection or reliability. A solid choice for structured, safe, and efficient electrical distribution in any compatible Eaton panel system.\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349601079458,"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_219308a6-7f12-4824-aa4b-2d96d57b37f4.png?v=1764150982","url":"https:\/\/www.ampstate.com\/products\/eaton-hkd3125x-125a-600v-3-pole-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}