{"product_id":"siemens-nnx3b900-circuit-breaker","title":"Siemens | NNX3B900 | Circuit Breaker | 900A | 3-Pole | 600V | Bolt-On","description":"\u003cdiv\u003e\n\u003cp\u003eIntroducing the Siemens NNX3B900 Circuit Breaker—built for demanding industrial power distribution. This 900A, 3-pole device delivers dependable overcurrent protection for three-phase systems, making it ideal for large feeders, motors, and critical loads. Designed for maintenance, retrofit, and replacement scenarios, it ensures you can match exact specifications quickly with the trusted Siemens component reference NNX3B900.\u003c\/p\u003e \u003ch2\u003eKey advantages at a glance\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003e900A current rating\u003c\/strong\u003e provides robust protection for high-demand circuits and large equipment.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3-pole configuration\u003c\/strong\u003e safeguards all three phases in a three-phase installation for balanced protection.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e600V rated\u003c\/strong\u003e suitable for a wide range of industrial electrical environments and equipment.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBolt-on mounting\u003c\/strong\u003e enables secure, straightforward installation in compatible panels with minimal modification.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eReliable Siemens build\u003c\/strong\u003e designed for longevity in challenging industrial settings and easier maintenance or retrofit work.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eThe NNX3B900 is particularly well-suited for protecting feeders to large motors, transformers, and other heavy loads in manufacturing facilities, processing plants, and commercial\/institutional power distribution rooms. Its bolt-on design simplifies replacement in existing Siemens enclosures, helping you minimize downtime during maintenance windows or retrofits.\u003c\/p\u003e \u003ch3\u003eWhy choose this model for your project\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003ePrecise alignment with Siemens panel configurations thanks to the NNX3B900 part number reference—reducing guesswork during procurement.\u003c\/li\u003e \u003cli\u003eClear fit and rating considerations are essential—verify compatibility before ordering to ensure a seamless install and uninterrupted protection.\u003c\/li\u003e \u003cli\u003eDesigned for scenarios where upgrading or replacing aging protection devices is necessary to maintain safety and compliance in high-capacity circuits.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eUsage scenarios include upgrading distribution feeders, replacing worn breakers in legacy installations, and outfitting new or retrofitted three-phase panels that require a compact, high-capacity bolt-on solution. If you’re planning a retrofit, this Siemens circuit breaker offers a practical balance of high amperage, solid phase protection, and straightforward installation—backed by Siemens’ reputation for reliability and support.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46426756087970,"sku":"NNX3B900","price":38576.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens-nnx3b900-circuit-breaker-900a-3-pole-600v-bolt-837.webp?v=1789616903","url":"https:\/\/www.ampstate.com\/products\/siemens-nnx3b900-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}