{"product_id":"square-d-qob330epd-30a-240v-3-pole-bolt-on-circuit-breaker","title":"Square D QOB330EPD - 30 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Square D QOB330EPD is a 30A, 240V, 3-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit protection in panelboards and load centers. Built for reliability in demanding environments, this breaker combines a secure mounting method with precise, repeatable protection performance.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting\u003c\/strong\u003e: provides a rigid, vibration-resistant bus connection that stays firmly seated, minimizing movement and maintaining consistent electrical continuity in panel assemblies.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e: merges thermal overload protection with instantaneous magnetic short-circuit protection, delivering stable trip characteristics across temperature variations and load changes.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible design\u003c\/strong\u003e: engineered to fit and operate with matching Square D load centers and panelboards, ensuring correct fit, coordinated trip curves, and straightforward replacement—no guesswork for installers.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThree-pole, 240V, 30A\u003c\/strong\u003e: ideal for protecting 3-phase branch circuits in commercial and light industrial panels, while also suited for residential electrical setups that require robust 240V protection.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile application\u003c\/strong\u003e: a reliable choice for panel upgrades, service entrances, and new installations where dependable overcurrent and short-circuit protection are essential.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical specs at a glance\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eManufacturer: Square D\u003c\/li\u003e \u003cli\u003ePart Number: QOB330EPD\u003c\/li\u003e \u003cli\u003eType: Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003eAmperage Rating: 30A\u003c\/li\u003e \u003cli\u003eVoltage Rating: 240V\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\u003eWhy this breaker stands out: it’s built to deliver predictable protection when it matters most. The bolt-on design reduces installation time and increases mechanical stability in panels undergoing vibration or movement, such as in busy service rooms or equipment closets. The thermal-magnetic trip ensures no nuisance trips under normal load while providing immediate response to dangerous short circuits, helping protect wiring, devices, and people. With OEM compatibility, you gain confidence that the replacement will integrate seamlessly with your existing Square D panelboard lineup, maintaining electrical safety standards and code compliance.\u003c\/p\u003e \u003cp\u003eIdeal for electricians, facility managers, and maintainers who value durable, easy-to-integrate protection for 3-phase systems, the Square D QOB330EPD is a smart choice for reliable, long-lasting circuit protection in residential, commercial, and light industrial applications.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355418808482,"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_fb5b4702-eefe-425c-b145-0d6c53b9282f.png?v=1764691982","url":"https:\/\/www.ampstate.com\/products\/square-d-qob330epd-30a-240v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}