{"product_id":"siemens-e43b045-circuit-breaker","title":"Siemens | E43B045 | Circuit Breaker | 45A | 3-Pole | 480V","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Siemens E43B045 Circuit Breaker — the trusted protection solution for demanding 3‑phase electrical systems. Engineered to deliver reliable overcurrent protection in industrial and commercial environments, this 45A, 3‑pole device is rated for up to 480V, making it ideal for modern 3‑phase installations.\u003c\/p\u003e\n\u003cp\u003eKey specifications:\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 480V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e E43B045\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhy choose the Siemens E43B045 for your system?\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eCompatible with Siemens panels and switchgear that specify the E43 series or the E43B045 part number, serving as a precise replacement or retrofit component.\u003c\/li\u003e \u003cli\u003eDesigned for reliable operation in 3‑phase power distribution, protecting motors, feeders, and control circuits from overloads and short circuits when properly installed.\u003c\/li\u003e \u003cli\u003eProven Siemens construction with a track record of durable performance in maintenance or emergency replacements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eUse cases and scenarios\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eMaintenance and retrofit projects where a direct match to existing equipment is required.\u003c\/li\u003e \u003cli\u003eSpare parts inventory for industrial facilities running 3‑phase equipment rated at 480V.\u003c\/li\u003e \u003cli\u003eReplacement in manufacturing lines, data centers, or facility power distribution where consistent 3‑phase protection is essential.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eHow to verify fit and ratings before ordering\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eCross-check the part number E43B045 against your panel labeling and equipment documentation.\u003c\/li\u003e \u003cli\u003eEnsure your system voltage and the downstream devices (motors, feeders) align with a 480V, 3‑pole protection device.\u003c\/li\u003e \u003cli\u003eFollow local electrical codes and hire a licensed electrician to perform the installation and testing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePractical installation tips\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eTurn off power and lockout\/tagout the circuit before replacement.\u003c\/li\u003e \u003cli\u003eUse appropriate torque settings for mounting and terminal connections as specified by Siemens documentation.\u003c\/li\u003e \u003cli\u003eTest the circuit after installation to confirm proper tripping behavior and system protection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNotes: Confirm fit and ratings before ordering. The part number is the best reference for compatibility, ensuring you are matching the correct 45A, 3‑pole, 480V device for your application.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46425645908130,"sku":"E43B045","price":310.0,"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\/siemens-e43b045-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}