{"product_id":"square-d-fhf16040-circuit-breaker","title":"Square D | FHF16040 | Circuit Breaker | 40A | 1-Pole | 277V","description":"\u003cdiv\u003e\n\u003cp\u003eSquare D FHF16040 Circuit Breaker is a genuine, reliable overcurrent protection device designed specifically for 277V circuits. This 40A, 1-Pole breaker is ideal for maintenance, retrofit, and replacement projects where exact specifications matter and compatibility is critical.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eKey specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eAmperage: 40A\u003c\/li\u003e \u003cli\u003ePoles: 1-Pole\u003c\/li\u003e \u003cli\u003eVoltage: 277V\u003c\/li\u003e \u003cli\u003ePart number: FHF16040\u003c\/li\u003e \u003cli\u003eBrand: Square D\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eCompatibility and ordering guidance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNotes: Confirm fit and ratings before ordering. The part number FHF16040 is the best reference for compatibility, helping you select the right breaker for your Square D panel and 277V circuits.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eCommon use scenarios\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eReplacing a failed or worn 277V, 40A circuit breaker in compatible Square D panels.\u003c\/li\u003e \u003cli\u003eRetrofit or upgrade projects that require a single-pole, 40A protection device.\u003c\/li\u003e \u003cli\u003eMaintenance work in commercial or light industrial settings where 277V distribution is used.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eWhy this matters\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eAuthentic Square D construction ensures reliable performance and seamless panel compatibility.\u003c\/li\u003e \u003cli\u003eA precise 40A rating provides appropriate protection for circuits designed to carry that load.\u003c\/li\u003e \u003cli\u003eDesigned to fit where 1-Pole, 277V specifications are required, reducing the risk of mismatched equipment and nuisance trips.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003ePractical installation tips\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003ePower down the service and verify that the panel is rated for 277V before replacing the breaker.\u003c\/li\u003e \u003cli\u003eKeep the part number (FHF16040) handy to confirm compatibility with your panel labeling.\u003c\/li\u003e \u003cli\u003eStore spare breakers in a dry, cool environment to maintain long-term reliability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46426378240162,"sku":"FHF16040","price":2010.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/square-d-fhf16040-circuit-breaker-40a-1-pole-277v-438.webp?v=1789566446","url":"https:\/\/www.ampstate.com\/products\/square-d-fhf16040-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}