{"product_id":"siemens-q390-90a-3p-circuit-breaker","title":"Siemens Q390 90A 3P Circuit Breaker, Plug-On | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eIntroducing the Siemens Q390 90A 3P Plug-On Circuit Breaker — a purpose-built protective device designed for panelboards, load centers, and electrical distribution systems. Its plug-on design enables fast, secure mounting, helping minimize downtime during panel upgrades, replacements, or new installations.\u003c\/p\u003e \u003cp\u003eWith a \u003cstrong\u003e90 amp\u003c\/strong\u003e rating and \u003cstrong\u003ethree poles\u003c\/strong\u003e, the Q390 delivers reliable three-phase protection for demanding commercial and light-industrial applications. When you need a direct part-number match for seamless interchangeability, this Siemens component provides the compatibility and confidence your team relies on.\u003c\/p\u003e \u003ch3\u003eWhy this breaker stands out\u003c\/h3\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eDirect part-number match\u003c\/strong\u003e — precision-fit compatibility with compatible Siemens panels reduces installation guesswork and errors.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePlug-On convenience\u003c\/strong\u003e — snap-in mounting simplifies replacements and minimizes wiring concerns in busy electrical rooms.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThree-phase protection\u003c\/strong\u003e — ideal for 3-phase circuits powering motors, HVAC systems, and multi‑load environments.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eReliable Siemens engineering\u003c\/strong\u003e — designed to perform consistently under distribution loads, delivering predictable tripping behavior.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eMaintenance and spare inventory for panel builders and service teams needing a ready-to-install, exact-fit breaker.\u003c\/li\u003e \u003cli\u003eReplacement in existing Siemens panelboards and load centers requiring a 3P, 90A protective device.\u003c\/li\u003e \u003cli\u003eThree-phase distribution in commercial spaces, data centers, small to mid-size industrial setups, and equipment rooms.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eIf you’re unsure about compatibility, AmpState offers direct assistance to confirm fit. Message us with your panel model or part-number context, and we’ll help verify that the Q390 is the right match for your installation.\u003c\/p\u003e \u003cp\u003eOrder the Siemens Q390 90A 3P Plug-On Circuit Breaker from AmpState today to streamline maintenance workflows and ensure reliable, compliant protection for your electrical distribution network.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"AmpState","offers":[{"title":"Default Title","offer_id":46412439978146,"sku":"Q390","price":339.0,"currency_code":"CAD","in_stock":true}],"url":"https:\/\/www.ampstate.com\/products\/siemens-q390-90a-3p-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}