{"product_id":"siemens-hhjd63b300-circuit-breaker","title":"Siemens | HHJD63B300 | Circuit Breaker | 300A | 3-Pole | 600V","description":"\u003cdiv\u003e\n\u003cp\u003eThe Siemens HHJD63B300 Circuit Breaker is a purpose-built protection solution designed for demanding electrical environments. With a 300 A rating, 3-pole configuration, and a 600 V operating capacity, this unit is tailored for maintenance, retrofit, and replacement projects where exact specifications matter. Designed to slot into compatible Siemens panels, it delivers reliable isolation and overcurrent protection when you need it most.\u003c\/p\u003e \u003ch3\u003eKey specifications\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\u003eVoltage rating:\u003c\/strong\u003e 600 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e HHJD63B300\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this Siemens circuit breaker stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eExact compatibility assurance:\u003c\/strong\u003e The part number HHJD63B300 is the best reference for matching your panel’s requirements, reducing the guesswork during replacement or retrofit.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eReliable, purpose-built protection:\u003c\/strong\u003e Built by Siemens for industrial and commercial applications, it provides dependable control for high-demand circuits.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eStreamlined maintenance and upgrades:\u003c\/strong\u003e Ideal for ongoing service, retrofits, or upgrades in panels that require a 3-pole, 600 V protection device at 300 A.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eClear fitment path:\u003c\/strong\u003e Designed to integrate with compatible Siemens enclosures and distribution panels, helping minimize downtime during installs.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eMaintenance and service work on industrial power distribution where a 300 A, 3-pole, 600 V breaker is specified.\u003c\/li\u003e \u003cli\u003eRetrofit projects updating older equipment to the current Siemens standard while maintaining the exact form factor and ratings.\u003c\/li\u003e \u003cli\u003eReplacement of a failed or outdated breaker in systems that require precise Siemens part compatibility.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eHow it solves common problems\u003c\/h3\u003e\n\u003cp\u003eFor facilities needing trustworthy protection without the risk of incompatible parts, the HHJD63B300 delivers exact specifications in one trusted package. The insistence on the correct part number helps avoid fitment issues, ensuring the panel remains compliant and the electrical system protected against overcurrent events.\u003c\/p\u003e \u003ch3\u003eImportant installation notes\u003c\/h3\u003e\n\u003cp\u003eBefore ordering, confirm fit and ratings for your specific panel. The Part number HHJD63B300 is the best reference for compatibility. As with all electrical work, rely on qualified personnel, follow applicable safety protocols, and ensure the power is safely isolated during installation or replacement.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46424502894754,"sku":"HHJD63B300","price":8189.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens-hhjd63b300-circuit-breaker-300a-3-pole-600v-658.webp?v=1789373436","url":"https:\/\/www.ampstate.com\/products\/siemens-hhjd63b300-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}