{"product_id":"eaton-br390st-90a-240v-3-pole-plug-in-circuit-breaker","title":"Eaton BR390ST - 90 A, 240 V, 3-Pole Plug-In Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eEaton BR390ST\u003c\/strong\u003e—a 90A, 240V, 3‑pole Plug-In Molded Case Circuit Breaker designed to protect panelboards and load centers with precision and speed. Built for dependable branch circuit overcurrent and short-circuit protection, it’s a smart choice for both new installations and panel upgrades.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eFast plug-in connection\u003c\/strong\u003e simplifies installation and quick replacement, minimizing downtime during maintenance or upgrades.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers stable, repeatable protection across a wide range of fault conditions, reducing nuisance trips while safeguarding sensitive equipment.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3-pole, 90A, 240V configuration\u003c\/strong\u003e supports three-phase circuits essential in commercial and light industrial settings.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible\u003c\/strong\u003e engineered to fit matching Eaton panelboards and load centers for reliable performance and seamless integration.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile applications\u003c\/strong\u003e ideal for residential, commercial, and light industrial protection needs where dependable trip performance matters.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eTechnical snapshot\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Eaton\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e BR390ST\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 90 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 240 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNumber of poles:\u003c\/strong\u003e 3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting style:\u003c\/strong\u003e Plug-in\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eThe BR390ST shines in any scenario requiring reliable three-phase protection delivered with speed and simplicity. It’s particularly well-suited for panel installations where downtime matters, or in upgrades where matching OEM hardware ensures consistent performance and warranty support.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eWhy this breaker matters\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003ePlug-in design accelerates serviceability and reduces field installation complexity, keeping panels up and running with minimal disruption.\u003c\/li\u003e \u003cli\u003eThermal-magnetic trip technology provides predictable interruption behavior, protecting motors, controls, and downstream circuits from damaging faults.\u003c\/li\u003e \u003cli\u003eOEM compatibility ensures a coordinated fit with Eaton panelboards and load centers, preserving system integrity and ease of parts management.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003ePractical use cases\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eUpgrade or replace aging 3‑pole breakers in commercial or light industrial panelboards to accommodate three‑phase loads with a robust 90A protection level.\u003c\/li\u003e \u003cli\u003eIntegrate into new installations where a reliable 3‑pole plug-in solution is required for motor control centers or three‑phase distribution.\u003c\/li\u003e \u003cli\u003eMaintain consistent maintenance practices by stocking a standard, compatible BR390ST breaker for rapid, code‑compliant service events.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349500645538,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/eaton_breaker_and_panels_8f5d2021-3996-4d82-bd54-3ed3e1fec00a.png?v=1764148323","url":"https:\/\/www.ampstate.com\/products\/eaton-br390st-90a-240v-3-pole-plug-in-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}