{"product_id":"square-d-mhl3640025dc-circuit-breaker","title":"Square D | MHL3640025DC | Circuit Breaker | 400A | 3-Pole | 600V","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D MHL3640025DC circuit breaker—a robust 400A, 3-pole, 600V unit designed for demanding electrical systems. This part is the reliable choice for maintenance, retrofit, and replacement projects where precise specs and dependable protection matter.\u003c\/p\u003e \u003cp\u003eKey specifications:\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage\u003c\/strong\u003e: 400A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles\u003c\/strong\u003e: 3-Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage\u003c\/strong\u003e: 600V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number\u003c\/strong\u003e: MHL3640025DC\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhy this matters for your panel:\u003c\/p\u003e \u003cul\u003e \u003cli\u003eThree-pole design supports three-phase power distribution for balanced protection across all legs of a 3-phase system.\u003c\/li\u003e \u003cli\u003e600V rating makes it suitable for industrial and commercial environments, aligning with typical 3-phase feeders and motor circuits.\u003c\/li\u003e \u003cli\u003eAs a maintenance or retrofit replacement, this specific part number ensures compatibility with existing Square D installations and preserves switchgear integrity.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eIdeal use cases:\u003c\/p\u003e \u003cul\u003e \u003cli\u003eReplacing a failed main or feeder breaker in a 3-phase 600V system.\u003c\/li\u003e \u003cli\u003eRetrofitting legacy panels that require a 400A, 3-pole, 600V Square D breaker with the exact part number.\u003c\/li\u003e \u003cli\u003eUpgrading service capacity or protecting industrial equipment racks, data centers, or manufacturing lines with a 400A feeder requirement.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eImportant compatibility note:\u003c\/p\u003e \u003cp\u003eBefore ordering, confirm fit and ratings for your specific panel. The part number MHL3640025DC is the most reliable reference for compatibility and ensures you get the exact trip characteristics and physical footprint needed for your enclosure.\u003c\/p\u003e \u003cp\u003eInstallation and safety tips (for qualified technicians):\u003c\/p\u003e \u003cul\u003e \u003cli\u003ePower down the system and follow lockout\/tagout procedures before working on any circuit breaker.\u003c\/li\u003e \u003cli\u003eVerify the panel's model, catalog number, and the intended circuit's current and voltage requirements match the breaker you’re purchasing.\u003c\/li\u003e \u003cli\u003eAdhere to the manufacturer's installation torque specs and guidelines for secure mounting and proper electrical contact.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eChoose Square D for dependable protection in 600V, three-phase environments. The MHL3640025DC delivers consistent performance and peace of mind for critical 400A feeders. \u003c\/p\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46426342129826,"sku":"MHL3640025DC","price":2010.0,"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-mhl3640025dc-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}