{"product_id":"square-d-qob120vh-20a-120v-1-pole-bolt-on-circuit-breaker","title":"Square D QOB120VH - 20 A, 120 V, 1-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Square D QOB120VH delivers dependable branch-circuit protection in a compact, bolt-on molded case design. With a 20A, 120V, 1-pole configuration, this breaker is built to protect electrical systems in panelboards and loadcenters while maintaining solid performance across residential, commercial, and light industrial environments.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting\u003c\/strong\u003e provides a rigid, vibration-resistant bus connection for reliable operation in demanding installations.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers stable, repeatable protection by responding to both overload currents and short-circuit events, helping prevent nuisance trips and equipment damage.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e OEM-compatible design\u003c\/strong\u003e ensures smooth integration with matching Square D load centers and panelboards for seamless electrical protection across your system.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile application\u003c\/strong\u003e ideal for residential panels, commercial spaces, and light industrial circuits requiring dependable overcurrent and short-circuit protection.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical snapshot\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 QOB120VH\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 20A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 120V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNumber of poles:\u003c\/strong\u003e 1\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting style:\u003c\/strong\u003e Bolt-on\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePrimary purpose:\u003c\/strong\u003e Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWho benefits from the QOB120VH\u003c\/h3\u003e\n\u003cp\u003e contractors and electricians selecting a reliable, easy-to-install protection device for new panel builds or upgrades will appreciate the bolt-on design that minimizes loose connections and vibration risks. Homeowners upgrading a panel or servicing a commercial space with tight electrical schedules will value the precise thermal-magnetic trip that shields wiring and devices from intermittent faults. In both scenarios, this breaker helps ensure safer, more consistent electrical performance with minimal downtime.\u003c\/p\u003e \u003ch3\u003eWhy this matters in real-world use\u003c\/h3\u003e\n\u003cp\u003eCompared to other breakers, the QOB120VH’s bolt-on mounting creates a sturdier connection to the bus, reducing the chance of connection drift in environments with vibration or movement. The thermal-magnetic trip unit provides a two-tier protection mechanism: the thermal element handles gradual overcurrent conditions, while the magnetic element rapidly trips during short circuits. That combination translates to faster fault interruption and improved protection for downstream equipment and wiring insulation.\u003c\/p\u003e \u003ch3\u003ePractical tips for optimal use\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003ePair with compatible OEM load centers and panelboards to ensure guaranteed fit and electrical performance.\u003c\/li\u003e \u003cli\u003eVerify panel labeling reflects the 20A rating and 1-pole configuration to avoid misapplication.\u003c\/li\u003e \u003cli\u003eWhen replacing older breakers, confirm bolt-on mounting compatibility with the panel’s bus bars to maintain a secure, vibration-resistant connection.\u003c\/li\u003e \u003cli\u003eKeep clear documentation on the installation for maintenance checks and future upgrades.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eUpgrade your electrical protection with the Square D QOB120VH — a focused, reliable solution for targeted branch-circuit safety in a wide range of settings. \u003cstrong\u003eOrder with confidence\u003c\/strong\u003e for consistent protection that’s designed to last in everyday service.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355406979234,"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_f902e8a9-0906-4be4-be89-181730071b46.png?v=1764691902","url":"https:\/\/www.ampstate.com\/products\/square-d-qob120vh-20a-120v-1-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}