{"product_id":"siemens-ed42s125a-125a-480v-2-pole-bolt-on-circuit-breaker","title":"Siemens ED42S125 A - 125 A, 480 V, 2-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eSiemens ED42S125A\u003c\/strong\u003e is a 125A, 480V, 2-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters. Built for demanding electrical environments, it combines rugged mounting with precise protection to keep systems running smoothly.\u003c\/p\u003e \u003ch3\u003eWhy bolt-on mounting matters\u003c\/h3\u003e\n\u003cp\u003eSecure bolt-on mounting provides a rigid, vibration-resistant bus connection that stays tight through start-ups and heavy loads. This stability helps maintain consistent electrical contact, reduces the risk of loose connections, and minimizes nuisance trips in environments with equipment vibration or frequent cycling.\u003c\/p\u003e \u003ch3\u003eReliable protection with a thermal-magnetic trip\u003c\/h3\u003e\n\u003cp\u003eThe ED42S125A features a thermal-magnetic trip unit for stable, repeatable protection performance. The thermal element handles overloads with predictable time-delay, while the magnetic element responds instantly to short circuits, helping to isolate faults quickly and protect wiring and devices downstream.\u003c\/p\u003e \u003ch3\u003eDesigned for compatibility and versatility\u003c\/h3\u003e\n\u003cp\u003eEngineered to be compatible with matching OEM load centers and panelboards, this 2-pole breaker offers a seamless retrofit or new-install solution in systems that require robust 480V fault protection. Its molded-case design supports reliable operation across a range of ambient conditions and duty cycles.\u003c\/p\u003e \u003ch3\u003eIdeal applications\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eResidential, commercial, and light industrial electrical installations requiring reliable 2-pole protection\u003c\/li\u003e \u003cli\u003ePanelboards and loadcenters where 480V systems are in operation\u003c\/li\u003e \u003cli\u003eBranch circuit protection for motors, lighting, and other electrical feeders in demanding environments\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eKey specifications 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 ED42S125A\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\u003eNumber of Poles:\u003c\/strong\u003e 2\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting Style:\u003c\/strong\u003e Bolt-on\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\u003ePractical tips and practical scenarios\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eUse in panelboards and loadcenters that require a sturdy, bolt-on connection for high-vibration environments or installations with motor loads.\u003c\/li\u003e \u003cli\u003eChoose when you need a reliable 125A protection device for 480V feeders, ensuring coordinated protection with upstream disconnects and downstream devices.\u003c\/li\u003e \u003cli\u003ePair with compatible Siemens OEM panels to simplify installation and maintain warranty coverage.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this Siemens breaker stands out\u003c\/h3\u003e\n\u003cp\u003eUnlike plug-in alternatives, the ED42S125A’s bolt-on design delivers a superior, vibration-resistant connection that remains durable over time. The combination of a thermal-magnetic trip and molded-case construction offers predictable protection behavior, helping you minimize downtime and protect wiring and equipment with confidence. For projects that demand robust 480V branch circuit protection in panelboards and loadcenters, the Siemens ED42S125A is a purpose-built choice that aligns with industrial and commercial electrical standards while remaining suitable for select residential applications.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349789331618,"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_ab71afef-8e02-4f22-b4a8-d9ddc348b80f.png?v=1764156806","url":"https:\/\/www.ampstate.com\/products\/siemens-ed42s125a-125a-480v-2-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}