{"product_id":"square-d-qh3301021","title":"Square D QH3301021 30A 3-Pole 240 V Circuit Breaker Potential Transformer","description":"\u003cdiv\u003e\n\u003cp\u003eIntroducing the Square D QH3301021 30A 3-Pole 240 V Circuit Breaker — a robust protection device engineered for dependable 3-phase power distribution. With a 30 A rating and 240 V operating range, this breaker guards motors, HVAC units, and other heavy equipment from overloads and short circuits while keeping energy flows steady and safe. The “Potential Transformer” designation signals easy integration with voltage sensing and metering systems, simplifying monitoring and energy management in modern facilities.\u003c\/p\u003e \u003ch2\u003eKey specifications\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eCurrent rating:\u003c\/strong\u003e 30 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 240 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e QH3301021\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e 3-pole circuit breaker for three-phase circuits\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eWhat sets this apart\u003c\/h2\u003e\n\u003cp\u003eThe QH3301021 leverages a three-pole design to simultaneously protect all phases, reducing the risk of dangerous phase imbalances that can occur with single- or two-pole solutions. Built for reliability in demanding environments, it supports consistent tripping behavior across all three conductors, helping to safeguard wiring, motors, and control circuits.\u003c\/p\u003e \u003ch2\u003eIdeal use cases\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eThree-phase motor control circuits in manufacturing and processing facilities\u003c\/li\u003e \u003cli\u003ePower distribution in commercial buildings and data centers\u003c\/li\u003e \u003cli\u003eHVAC equipment and large lighting systems wired for 3-phase supply\u003c\/li\u003e \u003cli\u003ePanel upgrades or replacements requiring the QH3301021 form factor\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eInstallation and integration tips\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eVerify panel compatibility with Square D QH-series breakers to ensure proper fit and bus alignment.\u003c\/li\u003e \u003cli\u003eEnsure supply is within 240 V and load current does not exceed 30 A for safe operation.\u003c\/li\u003e \u003cli\u003eIf integrating with potential-transformer-based monitoring, plan your metering and protection scheme to leverage this unit’s compatibility.\u003c\/li\u003e \u003cli\u003eHave a licensed electrician perform installation to comply with local electrical codes and safety standards.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eWhy choose Square D for your protection needs\u003c\/h2\u003e\n\u003cp\u003eSquare D has a long-standing reputation for durable, reliable distribution protection. The QH3301021 brings that reliability into 3-pole, 240 V circuits, delivering consistent protection for critical loads and simplifying maintenance with a standardized, field-proven design. It’s a precise, purpose-built solution when you need dependable 3-phase circuit protection in challenging environments.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46423072997538,"sku":"QH3301021","price":510.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/square-d-qh3301021-30a-3-pole-240-v-circuit-breaker-potential-409.webp?v=1789267384","url":"https:\/\/www.ampstate.com\/products\/square-d-qh3301021","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}