{"product_id":"square-d-qo340vh-40a-240v-3-pole-plug-in-circuit-breaker","title":"Square D QO340VH - 40 A, 240 V, 3-Pole Plug-In Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eSquare D QO340VH\u003c\/strong\u003e is a 40A, 240V, 3-pole plug-in molded case circuit breaker designed to deliver reliable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Built for quick installations and straightforward replacements, this unit keeps electrical systems safe with minimal downtime.\u003c\/p\u003e \u003cp\u003eKey features that set the QO340VH apart:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eFast plug-in connection:\u003c\/strong\u003e enables rapid installation and easy replacement in compatible Square D panelboards, reducing service time on upgrades or repairs.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit:\u003c\/strong\u003e provides stable, repeatable protection by responding to both overload conditions and short circuits, helping prevent nuisance trips and equipment damage.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM compatibility:\u003c\/strong\u003e engineered to work seamlessly with matching Square D OEM load centers and panelboards for dependable performance and proper fit.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile, residential to light industrial:\u003c\/strong\u003e ideal for a wide range of applications that require 40A at 240V across 3 poles, from home electrical upgrades to commercial and light industrial circuits.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eTechnical snapshot\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eManufacturer: Square D\u003c\/li\u003e \u003cli\u003ePart Number: QO340VH\u003c\/li\u003e \u003cli\u003eType: Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003eAmperage Rating: 40A\u003c\/li\u003e \u003cli\u003eVoltage Rating: 240V\u003c\/li\u003e \u003cli\u003eNumber of Poles: 3\u003c\/li\u003e \u003cli\u003eMounting Style: Plug-in\u003c\/li\u003e \u003cli\u003eApplications: Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhy choose this 3-pole 240V plug-in breaker? The design supports multi-wire and three-phase configurations common in today’s electrical panels, while the plug-in format minimizes installation errors and downtime. The thermal-magnetic trip curve delivers dependable protection across varying loads and temperatures, helping you maintain safe, continuous operation of connected equipment.\u003c\/p\u003e \u003cp\u003eUse scenarios:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eUpgrading or expanding residential panels to accommodate new 240V circuits (heaters, large appliances, or EV charging circuits).\u003c\/li\u003e \u003cli\u003eEquipping small commercial panelboards to safeguard lighting, receptacle, and equipment circuits.\u003c\/li\u003e \u003cli\u003eSupplementing light industrial panels where quick servicing and robust protection are essential.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003ePractical tips for installation and maintenance: verify that your panelboard is compatible with the QO series plug-in breakers, ensure the panel is rated for 240V 3-pole devices, and keep spare breakers on hand to minimize downtime during future service needs. With the Square D QO340VH, you gain a dependable, OEM-aligned solution that keeps your electrical system protected and running smoothly.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355405176994,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/square-d-qo340vh-40-a-240-v-3-pole-plug-in-circuit-breaker-ampstate-481.webp?v=1788755048","url":"https:\/\/www.ampstate.com\/products\/square-d-qo340vh-40a-240v-3-pole-plug-in-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}