{"product_id":"siemens-hfd63b090-90a-600v-3-pole-bolt-on-circuit-breaker","title":"Siemens HFD63B090 - 90 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Siemens HFD63B090 — a 90-amp, 600-volt, 3-pole bolt-on molded case circuit breaker designed to shield panelboards and loadcenters from overcurrent and short-circuit events. Built for reliability in residential, commercial, and light industrial settings, this unit provides robust protection where it matters most.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBolt-on mounting for a secure bus connection:\u003c\/strong\u003e a rigid, vibration-resistant fit that stays tight in panels subject to movement or regular cycling, helping prevent connection loosening over time.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit for dependable protection:\u003c\/strong\u003e combines a thermal mechanism for overload protection with an instantaneous magnetic trip for rapid isolation during faults, delivering stable, repeatable performance across varying loads and temperatures.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3-pole design for three-phase circuits:\u003c\/strong\u003e ideal for motor loads and multi-phase distribution, providing coordinated protection across all phases of your system.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible for seamless replacement:\u003c\/strong\u003e engineered to match matching Siemens OEM loadcenters and panelboards, simplifying upgrades and ensuring reliable fitment.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eTechnical specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eManufacturer: Siemens\u003c\/li\u003e \u003cli\u003ePart number: HFD63B090\u003c\/li\u003e \u003cli\u003eType: Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003eAmperage rating: 90 A\u003c\/li\u003e \u003cli\u003eVoltage rating: 600 V\u003c\/li\u003e \u003cli\u003eNumber of poles: 3\u003c\/li\u003e \u003cli\u003eMounting style: Bolt-on\u003c\/li\u003e \u003cli\u003eApplication: Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWho benefits from this breaker? developers and electricians working on distributed residential panels, commercial electrical rooms, and light industrial enclosures who need reliable, long-lasting protection for 3-phase circuits and complex loads. It’s particularly well-suited for upgrades or replacements in existing bolt-on panelboards where a firm, vibration-resistant connection and consistent trip performance matter most.\u003c\/p\u003e \u003cp\u003eWhy choose a bolt-on breaker like the HFD63B090? The bolt-on design delivers a more 固定 connection to the bus, reducing the risk of arcing or loosening in environments with vibration or heavy switching. The integrated thermal-magnetic trip unit provides a precise protection curve, helping prevent nuisance trips while still rapidly isolating dangerous faults.\u003c\/p\u003e \u003cp\u003ePractical tips for installation and use:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eVerify panelboard compatibility with Siemens OEM loadcenters before installation to ensure a perfect fit and labeling accuracy.\u003c\/li\u003e \u003cli\u003eFollow Siemens’ installation guidelines and torque recommendations for bolt-on mounting to achieve optimal bus connection security.\u003c\/li\u003e \u003cli\u003eInspect the breaker during commissioning and after electrical events; look for signs of overheating or discoloration around terminals and housing.\u003c\/li\u003e \u003cli\u003eKeep a small stock of same-model breakers on hand for quick replacements in service panels and distribution boards.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eIn summary, the Siemens HFD63B090 combines a rugged bolt-on build, a thermal-magnetic protection system, and OEM compatibility to deliver dependable, long-term branch circuit protection for three-phase applications. It’s a practical, purpose-built choice for professionals upgrading or installing reliable protection in panelboards and loadcenters.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349802569890,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens-hfd63b090-90-a-600-v-3-pole-bolt-on-circuit-breaker-162.webp?v=1788730132","url":"https:\/\/www.ampstate.com\/products\/siemens-hfd63b090-90a-600v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}