{"product_id":"westinghouse-lb3400wk-circuit-breaker","title":"Westinghouse | LB3400WK | Circuit Breaker | 400A | 600V","description":"\u003cdiv\u003e\n\u003cp\u003eEngineered for dependable protection in commercial and industrial electrical systems, the Westinghouse LB3400WK circuit breaker delivers precise, rapid isolation for 400A circuits at up to 600V. Designed for maintenance, retrofit, and replacement projects, this unit helps you safeguard equipment and keep downtime to a minimum where exact specifications matter.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage\u003c\/strong\u003e: 400A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating\u003c\/strong\u003e: 600V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number\u003c\/strong\u003e: LB3400WK\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCompatibility reference\u003c\/strong\u003e: The LB3400WK part number is the best reference for compatibility with your panel or enclosure.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOrdering note\u003c\/strong\u003e: Confirm fit and ratings before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhat makes the LB3400WK stand out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eDirect fit for panels and assemblies that require an LB-series breaker, reducing mounting and connection uncertainties during retrofit or replacement.\u003c\/li\u003e \u003cli\u003eWestinghouse reliability built into a unit designed for demanding commercial and industrial environments, helping to protect wiring, hardware, and downstream equipment.\u003c\/li\u003e \u003cli\u003eClear, unambiguous identification via the exact part number, streamlining procurement and field verification.\u003c\/li\u003e \u003cli\u003eStructured for maintenance workflows—keep a compatible spare on hand to minimize downtime during routine service or emergency replacement.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003ePanel retrofits where the existing infrastructure specifies an LB-series 400A, 600V breaker.\u003c\/li\u003e \u003cli\u003eReplacement of worn or obsolete breakers in service equipment to restore reliable protection.\u003c\/li\u003e \u003cli\u003eMaintenance planning in facilities where precise ratings and documented part references are required for compliance.\u003c\/li\u003e \u003cli\u003eEmergency shutdown upgrades or expansions that retain existing panel architecture while upgrading protection capabilities.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eCompatibility and ordering tips\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eAlways verify panel model, enclosure type, and bus connection compatibility with the LB3400WK before purchasing.\u003c\/li\u003e \u003cli\u003eThe part number LB3400WK should be your primary reference when confirming fitment and interchangeability.\u003c\/li\u003e \u003cli\u003eFactor in the system’s voltage and current requirements to ensure full protection alignment with downstream equipment.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eInstallation and safety considerations\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eWork only after properly de-energizing the system and following established lockout\/tagout procedures.\u003c\/li\u003e \u003cli\u003eUse appropriate personal protective equipment and consult the system documentation or a qualified electrician if there’s any doubt about compatibility.\u003c\/li\u003e \u003cli\u003eFollow manufacturer guidelines for torque, grounding, and enclosure mounting to maintain protection integrity.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWith the Westinghouse LB3400WK, you gain a dependable, specification-aligned solution for maintaining safe, efficient electrical distribution. Use the part number as your surest guide to compatibility, and plan your retrofit or replacement with confidence.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Westinghouse","offers":[{"title":"Default Title","offer_id":46426603225250,"sku":"LB3400WK","price":510.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_16d3a2fb-5d93-424c-9206-5031ec4b178f.png?v=1765492977","url":"https:\/\/www.ampstate.com\/products\/westinghouse-lb3400wk-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}