{"product_id":"eaton-ld3400c-400a-600v-3-pole-circuit-breaker","title":"Eaton LD3400C - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Eaton LD3400C — a 400A, 600V, 3-pole molded case circuit breaker designed to protect your electrical system with precision and reliability. Built for dependable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters, this unit is a practical choice for residential, commercial, and light industrial installations.\u003c\/p\u003e \u003ch3\u003eWhy the LD3400C stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eCompact molded case design\u003c\/strong\u003e maximizes panel space without compromising performance, making it easier to fit into dense electrical layouts and retrofit projects.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers stable, repeatable protection by combining thermal overload sensing with an instantaneous magnetic trip for short circuits. This means faster response to faults and reduced nuisance tripping during normal inrush conditions.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3-pole configuration for 3-phase systems\u003c\/strong\u003e ensures balanced protection across all phases, ideal for motor loads, HVAC gear, and other 3-phase equipment common in commercial and light industrial settings.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM panel compatibility\u003c\/strong\u003e designed to pair with matching Eaton loadcenters and panelboards, ensuring seamless installation and reliable performance within existing ecosystems.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHigh amperage with robust voltage rating\u003c\/strong\u003e at 400A and 600V, suitable for feeding large branch circuits and providing strong protection where power distribution demands are substantial.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use cases and practical applications\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003ePrimary or feeder protection in commercial electrical panels that service lighting, receptacle circuits, and small-to-midrange machinery.\u003c\/li\u003e \u003cli\u003eMotor control circuits in light industrial environments where 3-phase protection is essential for reliability and equipment longevity.\u003c\/li\u003e \u003cli\u003eResidential multi‑panel installations that demand centralized, dependable overcurrent protection for 3‑phase subpanels or resourceful distribution points.\u003c\/li\u003e \u003cli\u003eUpgrade projects where space efficiency and compatibility with Eaton panel hardware are priorities, helping reduce installation time and complexity.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical snapshot\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\u003cstrongmanufacturer\u003e: Eaton\u003c\/strongmanufacturer\u003e\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart Number\u003c\/strong\u003e: LD3400C\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: 400 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\u003eApplication\u003c\/strong\u003e: Branch circuit overcurrent and short-circuit protection in panelboards and loadcenters\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy it matters for your power system\u003c\/h3\u003e\n\u003cp\u003eThe LD3400C doesn’t just interrupt current—it provides a reliable, predictable protection strategy tailored to 3‑phase distribution. Its compact form factor frees up panel space, while the thermal-magnetic mechanism blends dependable overload protection with fast magnetic trip action during short circuits. For facilities that prioritize uptime and safety, this translates to shorter fault durations, reduced equipment damage, and clearer fault diagnostics for quick maintenance.\u003c\/p\u003e \u003ch3\u003eTips for optimal use\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eVerify panel compatibility with Eaton OEM loadcenters and panelboards to ensure a clean, trouble-free installation.\u003c\/li\u003e \u003cli\u003ePlan for future capacity by selecting a 3-pole device that aligns with your 3-phase loads and feeder configurations.\u003c\/li\u003e \u003cli\u003eLabel the circuit clearly and document trip settings in your electrical drawings to simplify maintenance and future upgrades.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349632012450,"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_7c511db9-411a-4886-8a41-9b032e84bac0.png?v=1764151982","url":"https:\/\/www.ampstate.com\/products\/eaton-ld3400c-400a-600v-3-pole-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}