{"product_id":"siemens-qj3m090-circuit-breaker","title":"Siemens | QJ3M090 | Circuit Breaker | 90A | 3-Pole | 240V | Bolt-On","description":"\u003cdiv\u003e\n\u003cp\u003eThe Siemens QJ3M090 circuit breaker is a purpose-built protection device for 3-phase electrical systems, delivering reliable overcurrent protection at 90A with a 240V rating. Its bolt-on mounting provides a sturdy, field-serviceable installation that’s ideal for retrofit work, maintenance, and replacement projects where these exact specs are required.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eKey specifications at a glance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 90A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3-Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 240V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Bolt-On\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number reference:\u003c\/strong\u003e QJ3M090\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eWhy choose the QJ3M090 for your panel?\u003c\/strong\u003e This 3-pole design ensures coordinated protection across all three phase lines, reducing the risk of unbalanced faults and providing a single-point disconnect for safer maintenance. The bolt-on style is favored in retrofit scenarios where existing panels require a secure, solid connection without complex chassis modifications.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eIdeal use cases\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eMaintenance and service of commercial or industrial 3-phase panels that operate at 240V\u003c\/li\u003e \u003cli\u003eRetrofits where current draw approaches 90A and reliable fault interruption is essential\u003c\/li\u003e \u003cli\u003eReplacement for a failed or aging unit with matching 3-pole, 240V, 90A specifications\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003ePractical considerations for installation and compatibility\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eAlways verify fit and ratings before ordering; the part number is the most reliable compatibility reference.\u003c\/li\u003e \u003cli\u003eEnsure the panel or enclosure supports bolt-on mounting and matches the QJ frame style for seamless replacement.\u003c\/li\u003e \u003cli\u003ePlan for proper wiring practices and secure bushings\/connectors to maintain safe, repeatable trips in fault conditions.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eDesigned with Siemens engineering standards, the QJ3M090 delivers dependable performance for demanding electrical environments. If your project requires a precise 90A, 3-pole, 240V bolt-on breaker with straightforward retrofit acceptance, this unit provides a clear, compatible solution that aligns with your maintenance and upgrade goals.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46427417182370,"sku":"QJ3M090","price":510.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens-qj3m090-circuit-breaker-90a-3-pole-240v-bolt-132.webp?v=1789720174","url":"https:\/\/www.ampstate.com\/products\/siemens-qj3m090-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}