{"product_id":"square-d-qo340epd-40a-240v-3-pole-plug-in-circuit-breaker","title":"Square D QO340EPD - 40 A, 240 V, 3-Pole Plug-In Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Square D QO340EPD is a 40A, 240V, 3-pole plug-in molded case circuit breaker designed for dependable branch circuit protection in panelboards and loadcenters. With a fast plug-in connection, it supports quick installation and effortless replacement when service needs change, minimizing downtime and maintenance time.\u003c\/p\u003e \u003ch3\u003eKey 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 QO340EPD\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 40A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage Rating:\u003c\/strong\u003e 240V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNumber of Poles:\u003c\/strong\u003e 3\u003c\/li\u003e \u003cstrong\u003eMounting Style:\u003c\/strong\u003e Plug-in \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 model stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eRapid plug-in installation\u003c\/strong\u003e: A streamlined connection that reduces on-site wiring time and simplifies panel maintenance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e: Delivers stable, repeatable protection by responding to both prolonged overloads and sudden short circuits, helping prevent nuisance trips or equipment damage.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible design\u003c\/strong\u003e: Engineered for seamless compatibility with matching Square D panelboards and load centers, ensuring reliable fit and performance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile performance range\u003c\/strong\u003e: Suitable for residential, commercial, and light industrial applications where dependable protective switching is essential.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal applications and use cases\u003c\/h3\u003e\n\u003cp\u003eUse the QO340EPD to safeguard branch circuits in panels that serve lighting, outlets, and equipment runs. Its 3-pole configuration is well-suited for 3-phase systems or multi-pole protection within mixed-use installations. Ideal scenarios include panelboard upgrades, breaker replacements in aging systems, or new builds that require precise 40A protection at 240V.\u003c\/p\u003e \u003ch3\u003eCompatibility and installation considerations\u003c\/h3\u003e\n\u003cp\u003eDesigned to pair with Square D OEM load centers and panelboards, this plug-in breaker preserves system integrity and simplifies field replacements. When installing, ensure the panelboard is listed for QO series devices and follow standard electrical safety practices. The 3-pole configuration supports balanced protection across phases, helping maintain system stability in commercial and light industrial environments.\u003c\/p\u003e \u003ch3\u003ePerformance you can rely on\u003c\/h3\u003e\n\u003cp\u003eWith a thermal-magnetic trip mechanism, the QO340EPD provides predictable, instantaneous response to short circuits and reliable thermal protection during sustained overcurrent events. This combination helps minimize downtime, protects connected equipment, and maintains electrical safety in busy panels where reliability matters most.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355405078690,"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_40340468-a1f0-4371-9773-cb9b963f31b1.png?v=1764691867","url":"https:\/\/www.ampstate.com\/products\/square-d-qo340epd-40a-240v-3-pole-plug-in-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}