{"product_id":"square-d-fhl16040-circuit-breaker","title":"Square D | FHL16040 | Circuit Breaker | 40A | 1-Pole | 277V","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D FHL16040 circuit breaker — a dependable single-pole protection device rated at 40 A for 277 V circuits. Designed for maintenance, retrofit, and replacement projects where exact specifications matter, this unit slots into standard panels to restore reliable overcurrent protection quickly.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 40 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 1-Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 277 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e FHL16040\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Square D\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eImportant compatibility notes: Confirm fit and ratings before ordering. The \u003cstrong\u003eFHL16040\u003c\/strong\u003e part number is the best reference for ensuring compatibility with your panel and load requirements.\u003c\/p\u003e \u003ch2\u003eIdeal applications\u003c\/h2\u003e\n\u003cp\u003eThis 1-pole, 40 A breaker is well-suited for protecting individual branches in commercial and light industrial electrical systems that run on 277 V. Use it in maintenance scenarios, retrofit projects, or replacements where a precise match to existing specifications is essential to maintain system safety and reliability.\u003c\/p\u003e \u003ch2\u003eWhat makes this Square D breaker unique\u003c\/h2\u003e\n\u003cp\u003eWith a dedicated 40 A rating and 277 V compatibility, this unit targets single-phase protection for circuits that power lighting, control circuits, or other essential loads in 277 V distributions. It’s selected specifically when the goal is to preserve original panel design and electrical protection characteristics without introducing mismatched components.\u003c\/p\u003e \u003ch2\u003ePractical guidance for use\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eKeep a spare on hand for facilities with frequent panel maintenance to minimize downtime.\u003c\/li\u003e \u003cli\u003eWhen replacing, verify that the panel type accepts FHL-series breakers and that the 40 A rating aligns with the circuit’s conductor sizing and downstream equipment.\u003c\/li\u003e \u003cli\u003eAlways rely on the part number for compatibility checks to avoid fit issues in the field.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46427228635298,"sku":"FHL16040","price":359.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/square-d-fhl16040-circuit-breaker-40a-1-pole-277v-709.webp?v=1789689374","url":"https:\/\/www.ampstate.com\/products\/square-d-fhl16040-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}