{"product_id":"square-d-fh360451021-circuit-breaker","title":"Square D | FH360451021 | Circuit Breaker | 45A | 3-Pole | 600V","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D FH360451021 circuit breaker — a precise, dependable solution for protecting three‑phase electrical systems in commercial and industrial panels. Designed for maintenance, retrofit, and replacement projects, this 45A, 3‑pole device delivers reliable overcurrent protection at up to 600V, helping you minimize downtime while safeguarding equipment and personnel.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eKey specifications at a glance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 45A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3‑Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 600V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBrand\/compatibility:\u003c\/strong\u003e Square D (part of Schneider Electric) — a trusted reference for panel compatibility\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eReference for fit:\u003c\/strong\u003e FH360451021\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eWhy this exact part matters\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eExact 3‑pole configuration engineered for three‑phase circuits common in commercial and industrial settings, ensuring balanced protection across all phases.\u003c\/li\u003e \u003cli\u003e600V rating makes it suitable for higher‑voltage distribution panels, where reliable interruption of faults is critical to maintain system integrity.\u003c\/li\u003e \u003cli\u003eUsing the precise part number FH360451021 as your compatibility reference helps you avoid mixups that can lead to mismatched ratings or fitment issues.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eIdeal use cases\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eMaintenance: replace aging or failed breakers to restore reliable protection without overhauling your panel.\u003c\/li\u003e \u003cli\u003eRetrofit: integrate updated protection for evolving electrical loads while maintaining compatibility with existing Square D panels.\u003c\/li\u003e \u003cli\u003eReplacement stock for facilities that operate 3‑phase, 600V distribution networks, ensuring quick, correct part sourcing.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eHow to verify compatibility (quick guide)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eCheck the panel nameplate or documentation to confirm it accepts a 3‑pole, 600V protective device.\u003c\/li\u003e \u003cli\u003eCross‑reference the exact part number FH360451021 to ensure the form factor and mounting align with your enclosure.\u003c\/li\u003e \u003cli\u003eConfirm that the amperage rating is appropriate for the circuit in question (45A) and that the trip characteristics meet your protection needs.\u003c\/li\u003e \u003cli\u003eIf in doubt, compare the physical dimensions and terminal layouts to your existing breaker or consult panel manufacturer guidelines.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eWhat problems this solves and practical benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003ePrevents electrical faults from cascading into equipment damage or downtime by providing precise overcurrent protection for three‑phase circuits.\u003c\/li\u003e \u003cli\u003eSupports streamlined maintenance workflows with a widely recognized, readily available part reference, reducing procurement delays.\u003c\/li\u003e \u003cli\u003eSupports retrofit projects that modernize protection schemes without requiring a panel swap, helping you extend the life of existing installations.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eFor professionals who rely on consistent, dependable protection in demanding environments, the Square D FH360451021 45A 3‑Pole 600V circuit breaker stands out as a targeted, compatible choice. Keep this essential part on hand for maintenance, retrofit, or replacement tasks, and reference the part number FH360451021 to ensure a precise fit every time.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46426378698914,"sku":"FH360451021","price":2010.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_a085eff1-75dd-47ee-b131-4c8df8f0489b.png?v=1765492976","url":"https:\/\/www.ampstate.com\/products\/square-d-fh360451021-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}