{"product_id":"siemens-hhld63b300l-circuit-breaker","title":"Siemens | HHLD63B300L | Circuit Breaker | 300A | 3-Pole | 600V","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eSiemens HHLD63B300L\u003c\/strong\u003e circuit breaker delivers robust 300-amp, 3-pole protection for demanding 600V electrical systems. Designed for maintenance, retrofit, and replacement projects where exact specifications matter, this device helps keep industrial power distribution safe, reliable, and ready for the next challenge.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eKey advantages at a glance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eExact fit and reference\u003c\/strong\u003e: The part number HHLD63B300L is the trusted cross-reference for compatibility, reducing guesswork when upgrading or replacing components in Siemens panels.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHigh-current capability\u003c\/strong\u003e: A 300A rating supports substantial loads on multi‑phase feeders, motors, and distribution circuits without compromising protection.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThree-pole design\u003c\/strong\u003e: Simultaneous interruption across all three phases ensures balanced protection and minimizes arcing in 3‑phase networks.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e600V operational limit\u003c\/strong\u003e: Ideal for industrial and commercial environments where higher-voltage protection is required.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaintenance, retrofit, and replacement\u003c\/strong\u003e: Specifically suited to projects that aim to preserve existing panel architecture while upgrading to current specs.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eReal-world applications\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eRetrofits in legacy Siemens panels that demand a precise 300A, 3-pole, 600V solution without altering the panel footprint.\u003c\/li\u003e \u003cli\u003eIndustrial manufacturing lines with heavy loads that require reliable, coordinated 3‑phase protection.\u003c\/li\u003e \u003cli\u003eCritical facilities and data centers where downtime is costly and straightforward part swaps minimize outage windows.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this Siemens breaker stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eReliable cross-compatibility through the exact part number, reducing compatibility risks during upgrades or replacements.\u003c\/li\u003e \u003cli\u003eDirectly addresses the needs of technicians and engineers who prioritize precise specifications over generic substitutes.\u003c\/li\u003e \u003cli\u003eSupports a streamlined maintenance workflow by matching the existing protection scheme and panel design.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical buying and installation notes\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eBefore ordering, verify fit and ratings against the panel label and project documentation. The HHLD63B300L designation is the most dependable reference for compatibility.\u003c\/li\u003e \u003cli\u003eFollow standard electrical safety practices and the panel manufacturer’s installation instructions during replacement or retrofit.\u003c\/li\u003e \u003cli\u003eKeep a correctly rated spare on hand to reduce downtime during maintenance windows or unexpected outages.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46427486486690,"sku":"HHLD63B300L","price":8083.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_ad06fdd7-931c-4a09-bfbe-d05329579cd6.png?v=1765492978","url":"https:\/\/www.ampstate.com\/products\/siemens-hhld63b300l-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}