{"product_id":"siemens-hfd63b125-125a-600v-3-pole-bolt-on-circuit-breaker","title":"Siemens HFD63B125 - 125 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eSiemens HFD63B125\u003c\/strong\u003e is a 125A, 600V, 3-pole bolt-on molded case circuit breaker designed to deliver dependable branch-circuit overcurrent and short-circuit protection in panelboards and load centers. Built for robust performance in demanding electrical environments, this unit combines secure mounting with precise protection to keep your systems safe and up and running.\u003c\/p\u003e \u003ch3\u003eWhy this breaker stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cb\u003eSecure bolt-on mounting\u003c\/b\u003e provides a rigid, vibration-resistant bus connection for consistent electrical contact and minimized loosening over time.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eThermal-magnetic trip unit\u003c\/b\u003e delivers stable, repeatable protection across varying temperatures and loads, helping to prevent nuisance trips while still guarding against faults.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eOEM-ready compatibility\u003c\/b\u003e is designed to work with matching Siemens load centers and other OEM panels, simplifying replacements and upgrades without compatibility surprises.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eThree-pole configuration\u003c\/b\u003e accommodates three-phase distribution, making it ideal for commercial and light industrial applications where balanced protection is essential.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003e125A rating and 600V rating\u003c\/b\u003e position this breaker for mainstream branch circuits in a range of installations, from service equipment to feeders in panelboards and load centers.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eDurable molded-case construction\u003c\/b\u003e provides long-term reliability in environments subject to vibration, temperature swings, and routine maintenance.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWho should consider the HFD63B125?\u003c\/h3\u003e\n\u003cp\u003eThis breaker is an excellent fit for electricians and facilities managers performing panelboard upgrades, replacements, or new installations in residential-commercial-light industrial settings. If you’re maintaining or expanding a three-phase distribution system, or you need a dependable bolt-on solution that pairs with Siemens or compatible OEM panels, the HFD63B125 offers a straightforward, reliable option.\u003c\/p\u003e \u003ch3\u003eKey benefits in practical terms\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cb\u003eEnhanced reliability in vibration-prone environments\u003c\/b\u003e thanks to secure bolt-on mounting that resists bus connection fatigue.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eConsistent protection across temperature variations\u003c\/b\u003e due to a thermal-magnetic trip design that adapts to changing load conditions.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eSimplified procurement and compatibility\u003c\/b\u003e with matching OEM panelboards, reducing integration risks during upgrades.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eClear, decisive protection for three-phase circuits\u003c\/b\u003e—ideal for commercial lighting, HVAC feeders, and general distribution in small to mid-size facilities.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eSpecifications at a glance\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cb\u003eManufacturer:\u003c\/b\u003e Siemens\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003ePart Number:\u003c\/b\u003e HFD63B125\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eType:\u003c\/b\u003e Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eAmperage Rating:\u003c\/b\u003e 125A\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eVoltage Rating:\u003c\/b\u003e 600V\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eNumber of Poles:\u003c\/b\u003e 3\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eMounting Style:\u003c\/b\u003e Bolt-on\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eApplication:\u003c\/b\u003e Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eInstallation and use tips\u003c\/h3\u003e\n\u003cp\u003eEnsure the panelboard or load center is compatible with the HFD63B125’s bolt-on mounting approach. Follow manufacturer torque guidelines for bolt-fastening to maintain a solid, vibration-resistant connection. Use in tandem with properly rated conductors and protective devices within the panel’s overall protection scheme. For upgrades, verify that the panel’s bus stabs and mounting feet align with the bolt-on breaker’s footprint to avoid fit issues.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349802799266,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens_breaker_and_panel_f358ea3a-a310-4a8a-975e-ba1133bbb9cd.png?v=1764157257","url":"https:\/\/www.ampstate.com\/products\/siemens-hfd63b125-125a-600v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}