{"product_id":"square-d-fh16020b-20a-277v-3-pole-plug-in-circuit-breaker","title":"Square D FH16020B - 20 A, 277 V, 3-Pole Plug-In Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eSquare D FH16020B\u003c\/strong\u003e is a 20A, 277V, 3-pole plug-in molded case circuit breaker designed for reliable overcurrent and short-circuit protection in panelboards and load centers. Built to meet OEM specifications, this unit ensures safe, predictable performance for a range of electrical systems from homes to light commercial installations.\u003c\/p\u003e \u003cp\u003eDesigned for fast, straightforward installation and field replacement, the FH16020B features a \u003cstrong\u003eplug-in connection\u003c\/strong\u003e that simplifies servicing and minimizes downtime on busy electrical panels. The \u003cstrong\u003ethermal-magnetic trip unit\u003c\/strong\u003e delivers stable, repeatable protection: the thermal element guards against nuisance trips on gradual load increases, while the magnetic element rapidly interrupts severely faulted conditions, helping protect wiring and equipment from damage.\u003c\/p\u003e \u003cp\u003eThis 3-pole design is ideal for \u003cstrong\u003e277V circuits\u003c\/strong\u003e and multi-wire configurations commonly found in commercial and light industrial environments. Its compatibility with matching OEM \u003cstrong\u003eload centers and panelboards\u003c\/strong\u003e ensures a safe, listed pairing that installers can trust for compliant panel assemblies.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eFast plug-in installation\u003c\/strong\u003e for quick upgrades, replacements, or panel refurbishments\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic protection\u003c\/strong\u003e provides dependable performance across varying loads\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e277V, 3-pole design\u003c\/strong\u003e suitable for multi-phase or multi-wire circuits\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible\u003c\/strong\u003e with Square D load centers and panelboards for certified pairing\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile applications\u003c\/strong\u003e—residential, commercial, and light industrial electrical systems\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eWho should consider the FH16020B?\u003c\/strong\u003e Electricians planning panel upgrades, contractors wiring multi‑circuit commercial spaces, or facilities managers maintaining light industrial equipment where reliable branch-circuit protection at 277V is required. It’s especially advantageous when you need a quick, code-compliant replacement that won’t disrupt ongoing operations.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003ePractical usage tips\u003c\/strong\u003e:\n- Verify the panelboard compatibility ahead of installation to ensure a seamless plug-in fit.\n- Use the 3-pole design where multi-phase protection is necessary to guard interconnected loads.\n- Pair with appropriate feeders and conductors sized for 20A circuits to maintain proper protection coordination.\n- Keep spare FH16020B breakers on hand for fast replacements during preventive maintenance or emergency servicing.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eTechnical specifications\u003c\/strong\u003e:\n- Manufacturer: \u003cstrong\u003eSquare D\u003c\/strong\u003e\n- Part number: \u003cstrong\u003eFH16020B\u003c\/strong\u003e\n- Type: \u003cstrong\u003eThermal-magnetic molded case circuit breaker\u003c\/strong\u003e\n- Amperage rating: \u003cstrong\u003e20A\u003c\/strong\u003e\n- Voltage rating: \u003cstrong\u003e277V\u003c\/strong\u003e\n- Number of poles: \u003cstrong\u003e3\u003c\/strong\u003e\n- Mounting style: \u003cstrong\u003ePlug-in\u003c\/strong\u003e\n- Application: \u003cstrong\u003eBranch circuit overcurrent and short-circuit protection\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355229048994,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/schnieder_and_square_d_breaker_and_panel_91c7e09d-f9c6-4c31-b10a-75c7a98c3b1d.png?v=1764690590","url":"https:\/\/www.ampstate.com\/products\/square-d-fh16020b-20a-277v-3-pole-plug-in-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}