{"product_id":"siemens-qj3b090h-circuit-breaker","title":"Siemens | QJ3B090H | Circuit Breaker | 90A | 3-Pole | 240V","description":"\u003cdiv\u003e\n\u003cp\u003ePower up safety and reliability in your three‑phase electrical system with the Siemens \u003cstrong\u003eQJ3B090H\u003c\/strong\u003e Circuit Breaker. This 90A, 3‑pole unit is built for 240V operation, delivering dependable interruption across all three phases when faults occur—helping protect motors, compressors, and other 240V equipment.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eKey specifications at a glance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eAmperage: 90 A\u003c\/li\u003e \u003cli\u003ePoles: 3‑Pole\u003c\/li\u003e \u003cli\u003eVoltage: 240 V\u003c\/li\u003e \u003cli\u003ePart number: QJ3B090H\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eDesigned for practical applications, this Siemens circuit breaker is ideal for maintenance, retrofit, and replacement projects where exact specifications matter. By matching the \u003cstrong\u003eQJ3B090H\u003c\/strong\u003e part number, you ensure a precise fit for your panel’s bus configuration and protection scheme. Always confirm fit and ratings before ordering to avoid mismatches.\u003c\/p\u003e \u003ch3\u003eWhy this unit stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eThree‑pole protection ensures synchronized shutdown across all three phases, reducing the risk of uneven loading and equipment damage.\u003c\/li\u003e \u003cli\u003eDurable Siemens engineering designed to tolerate the demands of commercial and industrial environments, providing consistent performance over time.\u003c\/li\u003e \u003cli\u003eClear compatibility path: rely on the part number \u003cstrong\u003eQJ3B090H\u003c\/strong\u003e to verify exact fit for your Siemens panel and avoid compatibility surprises.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eReplacing a worn or tripped breaker in a 3‑phase panel that serves motors, fans, or conveyors on a 240V system.\u003c\/li\u003e \u003cli\u003eRetrofits where equipment upgrades require a precise 90A, 3‑pole, 240V protective device to maintain safety and code compliance.\u003c\/li\u003e \u003cli\u003eMaintenance workflows that prioritize like‑for‑like components to minimize downtime and simplify field service documentation.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003ePractical guidance for procurement and installation: use the \u003cstrong\u003eQJ3B090H\u003c\/strong\u003e part number as the primary compatibility reference, and verify panel compatibility and ratings before purchase. This approach reduces the guesswork in sourcing and keeps your electrical protection aligned with your system’s design. For reliable, repeatable protection in 240V three‑phase applications, Siemens delivers a trusted solution with the \u003cstrong\u003eQJ3B090H\u003c\/strong\u003e.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003ePro tips\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eKeep spare QJ3B090H units on hand for planned maintenance or quick replacements during outages.\u003c\/li\u003e \u003cli\u003eDocument the part number in maintenance logs to streamline future service calls and orders.\u003c\/li\u003e \u003cli\u003eStore in a clean, dry environment to preserve contact integrity and performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46427419934882,"sku":"QJ3B090H","price":510.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens-qj3b090h-circuit-breaker-90a-3-pole-240v-154.webp?v=1789720771","url":"https:\/\/www.ampstate.com\/products\/siemens-qj3b090h-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}