{"product_id":"siemens-hjxd63b300l-circuit-breaker","title":"Siemens | HJXD63B300L | Circuit Breaker | 300A | 3-Pole","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Siemens HJXD63B300L, a dedicated 300A, 3-Pole circuit breaker engineered for robust protection in three-phase electrical systems. This unit is purpose-built for maintenance, retrofit, and replacement scenarios where exact specifications matter, delivering reliable interruption to protect wiring, devices, and personnel in demanding environments.\u003c\/p\u003e \u003ch3\u003eKey specifications at a glance\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 300 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3-Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e HJXD63B300L\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cem\u003eNote: Confirm fit and ratings before ordering. The part number is the best reference for compatibility.\u003c\/em\u003e\u003c\/p\u003e \u003ch3\u003eWhy this Siemens circuit breaker stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eDesigned for three-phase protection, ensuring reliable clearance and isolation in multi-wire systems common in industrial and commercial facilities.\u003c\/li\u003e \u003cli\u003eAligned with Siemens engineering standards, offering predictable performance when used in compatible panels and distribution boards.\u003c\/li\u003e \u003cli\u003eIdeal for upgrades and replacements where maintaining exact specifications is critical to system safety and compliance.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use cases and who benefits\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eMaintenance teams performing panel upkeep and component swaps in 3-phase electrical networks.\u003c\/li\u003e \u003cli\u003eRetrofit projects where older equipment needs to be upgraded to specify 300A, 3-Pole protection.\u003c\/li\u003e \u003cli\u003eReplacement of worn or damaged breakers in panels that accept the HJXD63B300L form factor and ratings.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical guidance for installation and compatibility\u003c\/h3\u003e\n\u003cp\u003eBefore you order, verify that your equipment accepts a 300A, 3-Pole Siemens device with the HJXD63B300L reference. Use the part number as the definitive compatibility check to ensure correct mounting, bus connections, and protective characteristics. If you’re upgrading or replacing, pair this breaker with matching Siemens components designed for the same panel family to maintain consistent protection performance and electrical safety standards.\u003c\/p\u003e \u003ch3\u003ePractical tips for best results\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eKeep a spare HJXD63B300L on hand for planned maintenance to minimize downtime.\u003c\/li\u003e \u003cli\u003eLabel the replacement process clearly in your panel documentation, citing the exact part number for future reference.\u003c\/li\u003e \u003cli\u003eConsult an licensed electrician to confirm panel compatibility and to perform the installation in accordance with local codes and standards.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46425634767010,"sku":"HJXD63B300L","price":4306.0,"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\/siemens-hjxd63b300l-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}