{"product_id":"square-d-pbq3640gc-fusible-bus-plug","title":"Square D | PBQ3640GC | Fusible Bus Plug | 400A | 3-Pole | 600V","description":"\u003cdiv\u003e\n\u003cp\u003eThe Square D \u003cstrong\u003ePBQ3640GC Fusible Bus Plug\u003c\/strong\u003e is a purpose-built replacement and retrofit solution for demanding 600V electrical distributions. Engineered for reliability in maintenance, upgrade, and renewal scenarios, this 400-amp, 3-pole fusible bus plug delivers a precise fit and predictable protection where it matters most.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eKey specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 400 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePole configuration:\u003c\/strong\u003e 3-Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 600 V\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eWhy choose the PBQ3640GC?\u003c\/strong\u003e This fusible bus plug is designed to align with Square D switchgear and distribution setups that require a strict 400A, 3-pole, 600V specification. By using the exact part number as the compatibility reference, you minimize misfits and ensure a seamless replacement process. The plug’s fusible design provides fast-acting protection, helping to isolate fault conditions quickly and reduce downstream damage.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eIdeal use cases\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eMaintenance: Replace aging or worn bus plugs to restore intended protection and performance.\u003c\/li\u003e \u003cli\u003e Retrofit: Update older panels to current 400 A, 3-Pole, 600 V standards without a full panel upgrade.\u003c\/li\u003e \u003cli\u003eReplacement: Quick, field-ready substitution when a fusible bus plug has failed or degraded.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003ePractical considerations\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eAlways confirm fit and ratings against your exact equipment before ordering. The PBQ3640GC is identified by its part number, which serves as the best reference for compatibility.\u003c\/li\u003e \u003cli\u003eDue to the critical nature of bus protection, ensure the replacement aligns with your panel’s protection strategy and fuse type requirements.\u003c\/li\u003e \u003cli\u003eCoordinate timing with maintenance windows to minimize impact on operations, since replacement involves secure isolation of affected bus sections.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eThe PBQ3640GC Fusible Bus Plug is a precise, engineered solution for professionals maintaining or upgrading Square D installations. With its defined 400 A, 3-pole, 600 V specification, it provides a dependable path to restore protection, streamline future servicing, and maintain peak system reliability.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46425755484322,"sku":"PBQ3640GC","price":6560.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_a085eff1-75dd-47ee-b131-4c8df8f0489b.png?v=1765492976","url":"https:\/\/www.ampstate.com\/products\/square-d-pbq3640gc-fusible-bus-plug","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}