{"product_id":"square-d-fh16040b-40a-1-pole-plug-in-circuit-breaker","title":"Square D FH16040B - 40 A, 1-Pole Plug-In Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eEngineered for dependable protection and quick service, the Square D FH16040B is a 40A, 1-pole plug-in molded case circuit breaker designed to safeguard your electrical system in panelboards and load centers. Built for fast installation and straightforward replacement, it keeps critical circuits powered while minimizing downtime during upgrades or maintenance.\u003c\/p\u003e \u003ch3\u003eWhy the FH16040B stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eFast plug-in connection\u003c\/strong\u003e for hassle-free installation and rapid swap-out when servicing or upgrading panelboards.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers stable, repeatable protection against overcurrent and short-circuit events, helping to prevent nuisance trips and protect connected equipment.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible design\u003c\/strong\u003e works with matching Square D load centers and panelboards, ensuring reliable fit and performance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile application\u003c\/strong\u003e suitable for residential, commercial, and light industrial electrical systems that require dependable branch-circuit protection.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical snapshot\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Square D\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e FH16040B\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 40A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNumber of Poles:\u003c\/strong\u003e 1\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 \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cp\u003eInstall the FH16040B in residential panels to protect lighting circuits, receptacle banks, or dedicated equipment runs. In commercial settings, it safeguards small electrical subsystems in offices, retail spaces, or service areas. For light industrial environments, it provides reliable protection for machines or charging stations where a fast-reacting, plug-in solution is advantageous.\u003c\/p\u003e \u003ch3\u003eWhat problems does it solve?\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eProvides \u003cstrong\u003ereliable overcurrent protection\u003c\/strong\u003e to prevent wiring damage and equipment failure from short circuits or overloads.\u003c\/li\u003e \u003cli\u003eEnables \u003cstrong\u003equick maintenance\u003c\/strong\u003e with a plug-in design, reducing panel downtime during replacement or upgrades.\u003c\/li\u003e \u003cli\u003eDelivers \u003cstrong\u003epredictable trip behavior\u003c\/strong\u003e through its thermal-magnetic mechanism, balancing time-delay response with magnetic instantaneous protection.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTips for optimal use\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eVerify compatibility with your OEM Square D load centers and panelboards before installation to ensure a seamless fit.\u003c\/li\u003e \u003cli\u003eUse as a dedicated protection device for circuits rated near 40A to maximize safety for high-draw loads and avoid nuisance trips from inrush currents.\u003c\/li\u003e \u003cli\u003eSchedule routine panel inspections and replace any breaker that shows signs of wear, overheating, or damage to the terminations.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhether you’re upgrading an aging panel, stocking a parts inventory, or performing routine electrical maintenance, the Square D FH16040B 40A, 1-pole plug-in circuit breaker delivers dependable protection, quick service, and broad compatibility for a wide range of panels and applications.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355231080610,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/square-d-fh16040b-40-a-1-pole-plug-in-circuit-breaker-ampstate-674.webp?v=1788743714","url":"https:\/\/www.ampstate.com\/products\/square-d-fh16040b-40a-1-pole-plug-in-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}