{"product_id":"square-d-qob320-20a-240v-3-pole-bolt-on-circuit-breaker","title":"Square D QOB320 - 20 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Square D QOB320 delivers reliable, three-pole protection for 240V circuits in panelboards and load centers. Engineered as a bolt-on molded case circuit breaker, this 20A device provides robust overcurrent and short-circuit protection with a focus on secure, long-lasting performance in demanding electrical environments.\u003c\/p\u003e \u003ch3\u003eWhy the QOB320 stands apart\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting\u003c\/strong\u003e – engineered for a rigid, vibration-resistant bus connection that stays locked in even in challenging installations.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e – delivers stable, repeatable protection by sensing both overcurrent and abrupt short-circuit events, helping prevent nuisance trips while ensuring fast response when real faults occur.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible design\u003c\/strong\u003e – engineered to pair with matching Square D OEM load centers and panelboards for straightforward upgrades, replacements, or retrofits.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile application\u003c\/strong\u003e – suitable for residential, commercial, and light industrial settings where dependable 3-pole protection at 240V is needed.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cp\u003eUse the QOB320 in panelboards and load centers that require solid 3-pole protection for 240V circuits. It’s well-suited for three-phase applications, equipment feeds, and branch circuits where reliability and consistent trip performance matter—whether you’re wiring a home electrical panel, a small business, or light industrial gear networks.\u003c\/p\u003e \u003ch3\u003eWhat you get and how it helps\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003e20A capacity\u003c\/strong\u003e ensures appropriate protection for circuits that demand reliable, moderate current handling without frequent trips.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e240V operation\u003c\/strong\u003e matches typical residential multi-wire and commercial 3-phase layouts, supporting a wide range of equipment and appliances.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3-pole configuration\u003c\/strong\u003e provides coordinated protection across all three conductors in suitable systems, helping to guard against multi-line faults.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBolt-on convenience\u003c\/strong\u003e simplifies installation into compatible panelboards, delivering a solid mechanical connection that supports ongoing reliability.\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 QOB320\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 \u003cstrong\u003eVoltage Rating:\u003c\/strong\u003e 240V \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 \u003cp\u003eUpgrade or maintain panelboard protection with a device that emphasizes a sturdy mechanical connection, precise trip behavior, and compatibility with Square D load centers. The QOB320 is a focused solution for dependable 240V, 3-pole protection in a variety of settings—delivering clarity of protection and peace of mind for your electrical infrastructure.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355416383650,"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_f718d984-5cac-4fdc-abf7-d3b6a4701046.png?v=1764691975","url":"https:\/\/www.ampstate.com\/products\/square-d-qob320-20a-240v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}