{"product_id":"lb3400s-circuit-breaker","title":"LB3400S | Circuit Breaker | 400A | 3-Pole | 600V","description":"\u003cdiv\u003e\n\u003cp\u003eLB3400S is an industrial circuit breaker designed to protect three-phase electrical systems in demanding environments. This 400A, 3-Pole, 600V device is ideal for maintenance, retrofit, and replacement tasks where exact specifications are required to maintain safety and reliability.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eKey specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eAmperage: 400A\u003c\/li\u003e \u003cli\u003ePoles: 3-Pole\u003c\/li\u003e \u003cli\u003eVoltage: 600V\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eImportant compatibility note\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eConfirm fit and ratings before ordering. The part number LB3400S is the best reference for compatibility with your panel or equipment.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eWhat makes LB3400S unique\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDesigned for three-phase protection in industrial settings, the LB3400S helps prevent motor damage, panel faults, and downtime by interrupting fault currents at the exact thresholds required by your system. Its 400A capacity supports robust load profiles typical of manufacturing lines, pumping stations, and other heavy equipment—delivering reliable protection without over-spec or under-protect.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eIdeal use cases\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eMaintenance: swap in a like-for-like unit to restore original protection and trip response.\u003c\/li\u003e \u003cli\u003eRetrofit: replace aging breakers to meet newer safety standards without overhauling your panel.\u003c\/li\u003e \u003cli\u003eReplacement: quick, reliable replacement in service equipment that calls for LB3400S-class protection.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eInstallation and verification tips\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBefore installation, verify that your system operates within a 600V maximum and that a 3-Pole configuration is required. Use the LB3400S part number as the primary compatibility check against your equipment list or OEM documentation. When wiring, adhere to standard electrical safety practices and follow the panel’s manufacturer torque and wiring guidelines to ensure secure connections.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"AmpState","offers":[{"title":"Default Title","offer_id":46426409926818,"sku":"LB3400S","price":2010.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/lb3400s-circuit-breaker-400a-3-pole-600v-658.webp?v=1789572323","url":"https:\/\/www.ampstate.com\/products\/lb3400s-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}