{"product_id":"siemens-hhld63b300-circuit-breaker","title":"Siemens | HHLD63B300 | Circuit Breaker | 300A | 3-Pole | 600V | Bolt-On","description":"\u003cdiv\u003e\n\u003cp\u003eSiemens HHLD63B300 is a high-capacity 300A, 3-pole circuit breaker engineered for demanding 3‑phase systems. With a 600V rating and a bolt-on mounting style, this unit is purpose-built for reliable protection in industrial and commercial electrical installations where precision, durability, and serviceability matter. Designed for maintenance, retrofit, and replacement projects, it ensures you can preserve system integrity without compromising on safety or performance.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003e amperage:\u003c\/strong\u003e 300A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e poles:\u003c\/strong\u003e 3‑Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e voltage rating:\u003c\/strong\u003e 600V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e mounting:\u003c\/strong\u003e Bolt-On\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e reference\/part number:\u003c\/strong\u003e HHLD63B300\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eKey benefits and why this matters for your install:\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure, vibration-resistant mounting:\u003c\/strong\u003e The bolt-on design provides a solid connection in harsh environments typical of industrial facilities, reducing the risk of loose connections and intermittent trips.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRobust 3‑phase protection:\u003c\/strong\u003e Three-pole configuration protects all phases simultaneously, making it ideal for motors, drives, and other heavy three‑phase loads where balanced protection is critical.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eClear compatibility reference:\u003c\/strong\u003e The part number HHLD63B300 is the most reliable reference for matching with your panel or distribution system, streamlining retrofit and replacement tasks.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile for retrofit and replacement:\u003c\/strong\u003e Suitable for maintenance, retrofit, and replacement projects where exact specifications must be matched to avoid downtime and ensure continued compliance.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWho this is ideal for:\u003c\/p\u003e \u003cul\u003e \u003cli\u003eIndustrial facilities upgrading or replacing failing 3‑pole breakers in Siemens or compatible panelboards\u003c\/li\u003e \u003cli\u003eCommercial distributors performing site retrofits where 300A protection is required for 3‑phase circuits\u003c\/li\u003e \u003cli\u003eMaintenance teams seeking a dependable, field-serviceable solution for high-current, low‑downtime installations\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eImportant considerations for a smooth purchase:\u003c\/p\u003e \u003cul\u003e \u003cli\u003eAlways \u003cstrong\u003everify fit and ratings\u003c\/strong\u003e before ordering. The HHLD63B300 reference is your best compatibility gauge.\u003c\/li\u003e \u003cli\u003eConfirm your panel’s mounting interface and three‑pole bus arrangement to ensure a proper bolt-on installation.\u003c\/li\u003e \u003cli\u003eEnsure the application involves \u003cstrong\u003e600V class circuits\u003c\/strong\u003e and that the overall load aligns with a 300A protection strategy.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhy it stands out compared to other options: the Siemens HHLD63B300 combines a rugged bolt-on construction with precise 3‑phase protection, delivering a secure mount and reliable performance in high‑load environments. This makes it a practical choice for upgrades or replacements where you need to maintain exact specifications without compromising safety or reliability.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46427486519458,"sku":"HHLD63B300","price":33221.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens-hhld63b300-circuit-breaker-300a-3-pole-600v-bolt-614.webp?v=1789730092","url":"https:\/\/www.ampstate.com\/products\/siemens-hhld63b300-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}