{"product_id":"square-d-qob31001021-100a-3-pole-bolt-on-circuit-breaker","title":"Square D QOB31001021 - 100 A, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D QOB31001021 — a \u003cstrong\u003e100 A, 3-pole bolt-on molded-case circuit breaker\u003c\/strong\u003e designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Built for real-world reliability, this unit combines a secure bolt-on mounting with a thermal-magnetic trip mechanism to provide stable, repeatable protection across a range of residential, commercial, and light-industrial settings.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting\u003c\/strong\u003e provides a rigid, vibration-resistant bus connection, helping maintain consistent electrical performance in panels that experience movement or vibration.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers precise, predictable protection—thermal element handles overloads while the magnetic element responds rapidly to short circuits for fast interruption.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM compatibility\u003c\/strong\u003e is built in—designed to be compatible with matching Square D OEM load centers and panelboards for seamless replacement and optimum system performance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e100 A, 3-pole configuration\u003c\/strong\u003e fits three-phase or multi-wire environments, suitable for broader protective coverage in appropriate panel setups.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDurable molded-case design\u003c\/strong\u003e engineered to withstand the demands of busy electrical environments while maintaining dependable protection.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical specifications\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Square D\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e QOB31001021\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage rating:\u003c\/strong\u003e 100 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNumber of poles:\u003c\/strong\u003e 3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting style:\u003c\/strong\u003e Bolt-on\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this breaker stands out\u003c\/h3\u003e\n\u003cp\u003eDesigned for reliability in panelboards and load centers, the QOB31001021 delivers robust protection where it matters most. The bolt-on mounting isn’t just about a snug fit—it reduces vibration-induced wear and ensures a solid, long-lasting electrical connection. The dual-stage protection from the thermal-m magnetic trip unit means you’ll see fewer nuisance trips and more predictable behavior during overloads and short circuits. Plus, its OEM compatibility simplifies replacement and stocking, making upgrades or repairs smoother and faster.\u003c\/p\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eResidential panels needing a dependable, space-efficient 3-pole protection solution for three-phase or multi-wire circuits.\u003c\/li\u003e \u003cli\u003eCommercial panelboards and light-industrial installations where rugged mounting and consistent trip performance matter.\u003c\/li\u003e \u003cli\u003ePanelboard upgrades or replacements that require exact compatibility with Square D OEM environments.\u003c\/li\u003e \u003cli\u003eService upgrades or additions that demand a solid, reliable 100 A protective device with fast short-circuit interruption.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eIncorporating the Square D QOB31001021 into your electrical system means embracing a proven combination of secure installation, precise protection, and OEM-aligned compatibility. It’s a practical, long-lasting choice for safeguarding circuits while maintaining straightforward maintenance and replacements in your panelboard or load-center setup.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355415990434,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/schnieder_and_square_d_breaker_and_panel_72a8068e-2804-4fad-aed8-f0e7d10209c8.png?v=1764691968","url":"https:\/\/www.ampstate.com\/products\/square-d-qob31001021-100a-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}