{"product_id":"square-d-lda36400u31x-400a-600v-3-pole-plug-in-circuit-breaker","title":"Square D LDA36400U31X - 400 A, 600 V, 3-Pole Plug-In Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D LDA36400U31X, a 400 A, 600 V, 3-pole plug-in molded case circuit breaker from AmpState. Built for dependable branch-circuit overcurrent and short-circuit protection, it integrates fast plug-in installation with precise, thermal-magnetic protection for panelboards and load centers.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eFast plug-in connection\u003c\/strong\u003e enables rapid installation and effortless replacement, reducing downtime during maintenance or upgrades.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers stable, repeatable protection across a range of loads and fault conditions, improving reliability on every cycle.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible design\u003c\/strong\u003e pairs with matching Square D load centers and panelboards for seamless integration and dependable performance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile 3-pole configuration\u003c\/strong\u003e supports three-phase systems common in commercial and light industrial environments, making it ideal for main feeders and distribution points.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRugged molded case construction\u003c\/strong\u003e provides durable protection in demanding electrical installations while maintaining a compact footprint.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eManufacturer: Square D\u003c\/li\u003e \u003cli\u003ePart Number: LDA36400U31X\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 \u003ch3\u003eIdeal Use Cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eUpgrading or replacing aging breakers in residential, commercial, and light industrial panelboards and load centers.\u003c\/li\u003e \u003cli\u003eProtection of high-current main feeders in three-phase electrical distributions.\u003c\/li\u003e \u003cli\u003eEngineering and maintenance projects requiring quick swaps with OEM-compatible components to minimize system downtime.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhy this model stands out: the LDA36400U31X combines a robust 400 A capability with quick-connect plug-in installation and a thermal-magnetic trip mechanism that maintains reliable protection under varying load conditions. Its compatibility with Square D OEM load centers ensures not just a fit, but a trusted, long-term performance path for your electrical distribution system. If you’re designing or maintaining panelboards and load centers that demand strong, immediate protection with straightforward service, this 3-pole plug-in breaker from Square D is a practical, purpose-built choice.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355320701090,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/schnieder_and_square_d_breaker_and_panel_525bcd82-074a-4930-9e29-fbbbb34be17e.png?v=1764691287","url":"https:\/\/www.ampstate.com\/products\/square-d-lda36400u31x-400a-600v-3-pole-plug-in-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}