{"product_id":"square-d-pbq4640gr-fusible-bus-plug","title":"Square D | PBQ4640GR | Fusible Bus Plug | 400A | 600V","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eSquare D PBQ4640GR\u003c\/strong\u003e is a purpose-built fusible bus plug designed for reliable, plug-in protection in compatible electrical distribution systems. rated at \u003cstrong\u003e400A\u003c\/strong\u003e and \u003cstrong\u003e600V\u003c\/strong\u003e, this component is ideal for maintenance, retrofit, and replacement projects where exact specifications matter.\u003c\/p\u003e \u003ch3\u003eKey use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eMaintenance tasks on Square D switchgear or distribution panels that require a like-for-like fusible bus plug replacement.\u003c\/li\u003e \u003cli\u003eRetrofit projects where upgrading or updating protection devices demands a 400A, 600V rating with a proven, compatible form factor.\u003c\/li\u003e \u003cli\u003eSpare parts stock for facilities with high uptime requirements, ensuring quick swaps to minimize downtime.\u003c\/li\u003e \u003cli\u003eRepairs that require matching the exact part reference to maintain electrical safety and system protection integrity.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eSpecifications at a glance\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 400A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 600V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e PBQ4640GR\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eImportant compatibility notes\u003c\/h3\u003e\n\u003cp\u003eBefore ordering, \u003cstrong\u003econfirm fit and ratings\u003c\/strong\u003e against your equipment. The \u003cem\u003ePBQ4640GR\u003c\/em\u003e part number is the best reference to ensure compatibility with your Square D assemblies and to maintain the intended protection profile.\u003c\/p\u003e \u003ch3\u003eWho benefits from this fusible bus plug\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eElectrical maintenance technicians and contractors who service Square D gear.\u003c\/li\u003e \u003cli\u003eFacilities managers responsible for asset reliability and uptime in industrial, commercial, or utility environments.\u003c\/li\u003e \u003cli\u003eEngineers planning retrofit projects that require exact 400A, 600V protection components for seamless integration.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this Square D bus plug stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eExact 400A, 600V rating ensures consistent protection behavior and coordination within existing protection schemes.\u003c\/li\u003e \u003cli\u003eDesigned for straightforward maintenance and replacement, reducing downtime during service windows.\u003c\/li\u003e \u003cli\u003ePart number accuracy (PBQ4640GR) provides clear reference for compatibility and future replacements.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhen you need a dependable, specification-matched fusible bus plug for Square D equipment, the PBQ4640GR delivers precise rating, reliable performance, and clear compatibility guidance—so you can keep panels protected and systems running smoothly.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46425753976994,"sku":"PBQ4640GR","price":11668.0,"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-pbq4640gr-fusible-bus-plug","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}