{"product_id":"square-d-lda36400u33x-400a-600v-3-pole-plug-in-circuit-breaker","title":"Square D LDA36400U33X - 400 A, 600 V, 3-Pole Plug-In Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D LDA36400U33X—a 400 A, 600 V, 3-pole plug-in molded case circuit breaker built to guard panels and distribution systems with precision. Designed for dependable branch circuit overcurrent and short-circuit protection, this unit is the smart choice for reliable power delivery in panelboards and loadcenters across residential, commercial, and light industrial applications.\u003c\/p\u003e \u003ch2\u003eWhy this breaker stands out\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eFast plug-in connection\u003c\/strong\u003e for quick installation and effortless replacement, minimizing downtime on service calls or upgrades.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers stable, repeatable protection across temperature variations, instantly responding to short circuits while smoothly handling overloads.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3-pole configuration\u003c\/strong\u003e ensures balanced protection for three-phase circuits, essential for commercial and light industrial setups.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e400 A, 600 V rating\u003c\/strong\u003e provides robust protection for high-demand feeders and main distribution paths.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible\u003c\/strong\u003e with matching Square D load centers and panelboards, helping maintain a clean, code-compliant electrical distribution system.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDurable molded-case design\u003c\/strong\u003e offers rugged protection in demanding environments while maintaining a compact footprint for installation flexibility.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eTechnical snapshot\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eManufacturer: Square D\u003c\/li\u003e \u003cli\u003ePart Number: LDA36400U33X\u003c\/li\u003e \u003cli\u003eType: Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003eAmperage Rating: 400 A\u003c\/li\u003e \u003cli\u003eVoltage Rating: 600 V\u003c\/li\u003e \u003cli\u003eNumber of Poles: 3\u003c\/li\u003e \u003cli\u003eMounting Style: Plug-in\u003c\/li\u003e \u003cli\u003eApplication: Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eIdeal use scenarios\u003c\/h2\u003e\n\u003cp\u003eSite this breaker in service entrances, main panels, or distribution centers where three-phase power is distributed. It’s a reliable choice for electricians upgrading aging panels, engineers designing new panel assemblies, or facility managers consolidating protection for motor loads and lighting circuits. Its high current rating makes it suitable for feeder lines in commercial spaces, light industrial equipment rooms, or data centers with moderate power demands.\u003c\/p\u003e \u003ch2\u003ePractical benefits and outcomes\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eMinimize downtime with a plug-in design that simplifies maintenance and reduces circuit-breaker replacement time.\u003c\/li\u003e \u003cli\u003eMaintain consistent protection across varying loads and ambient temperatures thanks to the thermal-magnetic trip system.\u003c\/li\u003e \u003cli\u003ePreserve panel integrity and continuity by using a breaker that aligns with OEM load centers, helping ensure correct fit and trip characteristics.\u003c\/li\u003e \u003cli\u003eProvide robust safety margins for critical circuits while supporting straightforward expansion or reconfiguration of the electrical system.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eGetting it right\u003c\/h2\u003e\n\u003cp\u003eFor best results, pair the Square D LDA36400U33X with compatible OEM load centers and panelboards, verify three-phase requirements, and follow local electrical codes during installation. This unit is purpose-built for dependable branch-circuit protection where speed, reliability, and durability matter most.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355320766626,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/square-d-lda36400u33x-400-a-600-v-3-pole-plug-in-circuit-breaker-966.webp?v=1788750122","url":"https:\/\/www.ampstate.com\/products\/square-d-lda36400u33x-400a-600v-3-pole-plug-in-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}