{"product_id":"siemens-ed43b125l-125a-480v-3-pole-circuit-breaker","title":"Siemens ED43B125L - 125 A, 480 V, 3-Pole Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eSiemens ED43B125L is a 125A, 480V, 3-pole molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers.\u003c\/p\u003e \u003cp\u003eThe compact molded case design maximizes usable panel space, making it an efficient choice for installations where space is at a premium. Its thermal-magnetic trip unit delivers stable, repeatable protection performance, ensuring fast, reliable response to overloads and short circuits across a range of operating conditions. This means fewer nuisance trips and more consistent protection for your electrical system.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003e3-pole, 125A, 480V configuration\u003c\/strong\u003e for three-phase circuits common in commercial and light industrial environments.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip mechanism\u003c\/strong\u003e provides balanced protection against both overloads and short circuits, reducing the risk of equipment damage.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCompact molded case design\u003c\/strong\u003e optimizes panel space and simplifies installation and maintenance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible\u003c\/strong\u003e with matching Siemens OEM load centers and panelboards, ensuring a clean, reliable fit and straightforward replacement.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile installation profile\u003c\/strong\u003e suitable for residential, commercial, and light industrial applications where 480V service is standard.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this matters\u003c\/h3\u003e\n\u003cp\u003eIn higher-voltage, three-phase systems, reliable protection is critical to protect wiring, transformers, motors, and downstream devices. The ED43B125L couples Siemens engineering with a proven molded case design to deliver predictable tripping behavior, minimizing downtime and maintenance costs in busy electrical spaces.\u003c\/p\u003e \u003ch3\u003eApplications and use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eNew commercial installations that rely on 480V three-phase power distribution.\u003c\/li\u003e \u003cli\u003ePanelboard upgrades or replacements in warehouses, office complexes, and light industrial facilities.\u003c\/li\u003e \u003cli\u003eService panels in multi-zone buildings where space efficiency and reliable protection are priorities.\u003c\/li\u003e \u003cli\u003eReplacement of aging breakers in OEM-spec panels to maintain warranty alignment and performance.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eSpecifications at a glance\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: ED43B125L\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: 125A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage Rating\u003c\/strong\u003e: 480V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles\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 \u003cp\u003eFor professionals seeking a proven, space-efficient, OEM-compatible protection solution for 480V three-phase systems, the Siemens ED43B125L provides precise protection, reliable operation, and seamless compatibility with Siemens panelboards and load centers.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349790445730,"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_b0be131a-6a7f-44c4-8f2f-f0f74560c1d1.png?v=1764156848","url":"https:\/\/www.ampstate.com\/products\/siemens-ed43b125l-125a-480v-3-pole-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}