{"product_id":"square-d-qob390vh-90a-240v-3-pole-bolt-on-circuit-breaker","title":"Square D QOB390VH - 90 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D QOB390VH — a robust 90A, 240V, 3-pole bolt-on molded case circuit breaker engineered for dependable branch circuit protection in panelboards and load centers. Its secure bolt-on mounting delivers a rigid, vibration-resistant bus connection, helping maintain reliable protection even in environments with equipment movement.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting:\u003c\/strong\u003e a rigid, vibration-resistant connection to the bus for long-term, dependable performance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit:\u003c\/strong\u003e combines temperature-triggered and magnetic trip technology for stable, repeatable protection against overloads and short circuits.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible:\u003c\/strong\u003e designed to integrate with matching Square D OEM load centers and panelboards for a seamless, code-compliant installation.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile applications:\u003c\/strong\u003e ideal for residential, commercial, and light industrial electrical systems that require reliable 90A, 240V protection.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCore specs at a glance:\u003c\/strong\u003e 3-pole, bolt-on mounting, 90A, 240V — perfect for safeguarding branch circuits from overcurrent and short circuits.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eUse cases that benefit from the QOB390VH include panel upgrades in homes, small commercial installations, and light industrial feeders where consistent protection is non-negotiable. The bolt-on design simplifies installation on standard bus bars, reducing the risk of loose connections and ensuring a solid, lasting fit. With its thermal-magnetic trip mechanism, you get predictable response times and fewer nuisance trips, while quickly disconnecting during high-energy faults to protect wiring and devices downstream.\u003c\/p\u003e \u003ch3\u003eWhy this model stands out\u003c\/h3\u003e\n\u003cp\u003eThe QOB390VH is purpose-built for reliability in environments that demand solid, code-compliant protection. By pairing a robust mechanical mounting approach with a proven trip method, it delivers a clear, durable solution for branch circuit protection across residential, commercial, and light industrial panels. When you choose this 3-pole bolt-on breaker, you’re investing in a protective device that aligns with Square D’s panel ecosystems and provides dependable performance for critical electrical distributions.\u003c\/p\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: QOB390VH\u003c\/li\u003e \u003cli\u003eType: Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003eAmperage Rating: 90A\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\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355421724834,"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_79e25b4d-368d-4677-b788-3d02eccfa784.png?v=1764692004","url":"https:\/\/www.ampstate.com\/products\/square-d-qob390vh-90a-240v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}