{"product_id":"square-d-fa34045-three-phase-i-line-circuit-breaker","title":"Square D FA34045 Three-Phase I-Line Circuit Breaker","description":"\u003cdiv\u003e\u003cp\u003eSquare D FA34045 Type FA I-Line Circuit Breaker is a three‑pole, 45‑amp molded‑case protection device designed for 480V three‑phase systems. Built for plug‑in mounting in Square D I‑Line panelboards, it uses a thermal‑magnetic trip mechanism to provide overload and short‑circuit protection. The line‑side I‑Line connection and ABC phase arrangement are specified features of the I‑Line family, supporting secure, fast installation with compatible panel infrastructure. The FA34045 carries an interrupting rating of 18 kA at 480V, offering robust fault‑current protection for feeders and motor circuits in commercial and light‑industrial power distributions. This model belongs to the FA line, meaning it shares the FA‑series termination and mounting characteristics that simplify integration with other FA I‑Line breakers in the same installation. In typical use, technicians select the FA34045 to protect 480V feeders and 3‑phase circuits where a compact, field‑serviceable 45A breaker is required, ensuring coordinated protection across downstream devices while fitting within standard FA I‑Line panelboard footprints. \u003c\/p\u003e\u003c\/div\u003e","brand":"Square","offers":[{"title":"Used Surplus - Excellent Condition","offer_id":46259018203370,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0716\/8039\/3450\/files\/GTG-STOCK-012.png?v=1788727428","url":"https:\/\/gtghardware.com\/products\/square-d-fa34045-three-phase-i-line-circuit-breaker","provider":"GTG Hardware","version":"1.0","type":"link"}