{"product_id":"siemens-hjxd63b300-circuit-breaker","title":"Siemens | HJXD63B300 | Circuit Breaker | 300A | 3-Pole | 600V | Bolt-On","description":"\u003cdiv\u003e\n\u003cp\u003eSiemens HJXD63B300 is a rugged, high-capacity circuit breaker designed for demanding three-phase power systems. With a 300A rating across three poles and a 600V maximum, it delivers reliable overcurrent protection for commercial and industrial equipment while fitting neatly into bolt-on panel configurations.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eKey specs at a glance\u003c\/strong\u003e\u003cbr\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 300A\u003cbr\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3-Pole\u003cbr\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 600V\u003cbr\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Bolt-On\u003cbr\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e HJXD63B300\u003c\/p\u003e \u003ch3\u003eWhy this breaker stands out\u003c\/h3\u003e\n\u003cpthis siemens component is built for retrofit maintenance and replacement projects where exact compatibility matters. the bolt-on design simplifies installation in compatible switchgear panel boards reducing downtime during upgrades ensuring a secure vibration-resistant connection demanding environments. by choosing part number hjxd63b300 you align with documented ratings construction helping maintain electrical system integrity across three-phase networks.\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cp\u003eThis 3-pole, 600V breaker is well-suited for:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003ePanel retrofits and service upgrades in industrial facilities\u003c\/li\u003e \u003cli\u003eReplacement breakers for existing Siemens installations that require a 300A, 3-pole, 600V bolt-on unit\u003c\/li\u003e \u003cli\u003eProtection of three-phase motors and distribution circuits in manufacturing lines, HVAC systems, and process equipment\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eFit, compatibility, and installation notes\u003c\/h3\u003e\n\u003cp\u003eBefore ordering, confirm that your equipment accepts a bolt-on style and that the ratings match your system requirements. The line emphasizes compatibility with Siemens assemblies, and the part number HJXD63B300 is the most reliable reference for ensuring a proper match. Installation should be performed by a qualified electrician or technician familiar with three-phase electrical distribution and panel mounting practices.\u003c\/p\u003e \u003ch3\u003eWhat problems does it solve?\u003c\/h3\u003e\n\u003cp\u003eBy providing precise 300A protection across all three phases, this breaker helps guard electrical circuits against overcurrent faults, reducing the risk of equipment damage and unplanned downtime. It’s a dependable option for maintaining continuity of service in environments where fast, secure upgrades and replacements are essential.\u003c\/p\u003e \u003ch3\u003eHow it compares to generic equivalents\u003c\/h3\u003e\n\u003cp\u003eChoosing a Siemens HJXD63B300 means opting for a recognized industrial standard with known compatibility in Siemens and legacy installations. Unlike generic substitutes, this unit aligns with established ratings, mounting methods, and a robust build designed for long service life in real-world operating conditions.\u003c\/p\u003e \u003cp\u003eIn short, if your project involves a 300A, 3-pole, 600V bolt-on circuit breaker, the Siemens HJXD63B300 offers a precise, reliable solution that supports seamless upgrades, dependable protection, and straightforward maintenance within three-phase electrical systems.\u003c\/p\u003e\u003c\/pthis\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46425627820194,"sku":"HJXD63B300","price":4306.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens-hjxd63b300-circuit-breaker-300a-3-pole-600v-bolt-271.webp?v=1789432879","url":"https:\/\/www.ampstate.com\/products\/siemens-hjxd63b300-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}