{"product_id":"siemens-qj3b150-circuit-breaker","title":"Siemens | QJ3B150 | Circuit Breaker | 150A | 3-Pole | 240V | Bolt-On","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Siemens QJ3B150—a bolt-on circuit breaker engineered for dependable protection in 240V, three‑phase systems. With a 150A rating and a 3‑pole configuration, this unit is built to guard your distribution feeders while delivering straightforward maintenance, retrofit, and replacement capabilities in compatible Siemens panels.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eKey specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 150A\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\u003eBest reference for compatibility:\u003c\/strong\u003e QJ3B150\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this Siemens QJ3B150 stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eBolt‑on mounting provides a secure, reliable connection that simplifies installation and reduces panel alteration during retrofit or maintenance.\u003c\/li\u003e \u003cli\u003e3‑pole design protects all three phases in 240V three‑phase circuits, delivering balanced protection across the system.\u003c\/li\u003e \u003cli\u003eManufactured by Siemens, offering OEM integrity and compatibility with panels designed to accept the QJ3B150 form factor.\u003c\/li\u003e \u003cli\u003eSpecifically suited for replacement and retrofit projects where exact spec matching is critical to system safety and performance.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eReplacing a failed or aging 150A, 3‑pole breaker in commercial or light industrial 240V three‑phase panels.\u003c\/li\u003e \u003cli\u003eRetrofits and service upgrades where maintaining the exact Siemens form factor minimizes panel downtime.\u003c\/li\u003e \u003cli\u003eSpare parts planning for ongoing maintenance in facilities that rely on Siemens protection equipment.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eCompatibility and ordering guidance\u003c\/h3\u003e\n\u003cp\u003eBefore you order, confirm the fit and ratings for your specific panel. The part number is the most reliable reference for compatibility, so use QJ3B150 as the primary cross-check against your panel model and distribution setup. This ensures you get the exact breaker required for safe, compliant operation in your 240V, three‑phase system.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46427418886306,"sku":"QJ3B150","price":510.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens-qj3b150-circuit-breaker-150a-3-pole-240v-bolt-103.webp?v=1789720524","url":"https:\/\/www.ampstate.com\/products\/siemens-qj3b150-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}