{"product_id":"siemens-hnx3b120l-1200a-3-pole-circuit-breaker","title":"Siemens HNX3B120L - 1200 A, 3-Pole Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eSiemens HNX3B120L\u003c\/strong\u003e is a 1200 A, 3-pole molded case circuit breaker designed for dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. From AmpState, this unit brings precise thermal-magnetic protection to residential, commercial, and light industrial settings where reliable power safety matters.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eCompact molded-case design\u003c\/strong\u003e maximizes panel space without compromising protection, helping you fit larger systems into standard enclosures.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers stable, repeatable protection by combining thermal overcurrent sensing with magnetic short-circuit sensing for fast, predictable trips when needed.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible performance\u003c\/strong\u003e engineered to pair seamlessly with matching Siemens load centers and panelboards, simplifying replacement and panel upgrades.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRugged, long-life construction\u003c\/strong\u003e built to endure the demands of busy electrical environments, from installation to daily operation in demanding locations.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhat problems does the HNX3B120L solve?\u003c\/h3\u003e\n\u003cp\u003eWhen protected by a high-capacity three-pole breaker, large feeders and three-phase circuits stay safeguarded against overloads and short circuits, reducing the risk of equipment damage and downtime. The thermal-magnetic design minimizes nuisance trips while ensuring swift response to dangerous faults, keeping panels and connected devices safer and more reliable.\u003c\/p\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eResidential and commercial panelboards that require robust protection for three-phase feeders\u003c\/li\u003e \u003cli\u003eLight industrial electrical rooms with substantial load demands\u003c\/li\u003e \u003cli\u003eHVAC, motor control centers, and large equipment feeds within safe, code-compliant panels\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical snapshot\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Siemens\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e HNX3B120L\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 1200 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNumber of poles:\u003c\/strong\u003e 3\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\u003eInstallation and compatibility tips\u003c\/h3\u003e\n\u003cp\u003eFor optimal performance, pair the HNX3B120L with Siemens OEM load centers and panelboards designed to accommodate this 3-pole, 1200 A molded case breaker. Verify that the panel’s space, bus configuration, and labeling support a high-capacity, three-phase protection device. This breaker is designed for straightforward replacement in compatible Siemens panel systems, helping you streamline upgrades and maintenance.\u003c\/p\u003e \u003ch3\u003eWho benefits\u003c\/h3\u003e\n\u003cp\u003eElectrical contractors, facilities managers, and maintenance teams seeking a dependable, high-capacity protection solution for large panelboard installations will appreciate the Siemens HNX3B120L. It offers precise protection characteristics, easy integration with Siemens ecosystems, and a space-efficient form factor that supports scalable electrical design.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349812695202,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens_breaker_and_panel_2df79cb9-ffc7-48de-94d2-19e60d9088e6.png?v=1764157534","url":"https:\/\/www.ampstate.com\/products\/siemens-hnx3b120l-1200a-3-pole-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}