{"product_id":"siemens-ngb3k040b-circuit-breaker","title":"Siemens | NGB3K040B | Circuit Breaker | 40A | 3-Pole | 347V","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Siemens NGB3K040B Circuit Breaker—a reliable 40A, 3‑pole protection device engineered for 347V three‑phase systems. This unit is purpose-built for maintenance, retrofit, and replacement projects where exact specifications matter, helping you keep critical equipment safe and operational without guesswork.\u003c\/p\u003e \u003ch2\u003eWhy this Siemens NGB3K040B stands out\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eThree‑pole protection\u003c\/strong\u003e ensures synchronized shutoff across all three phases, reducing the risk of phase imbalance and protecting motors, drives, and controllers.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e40A current rating\u003c\/strong\u003e provides precise overcurrent protection for moderate‑load industrial and commercial circuits, helping prevent wiring damage and equipment failure.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e347V compatibility\u003c\/strong\u003e makes it suitable for many industrial distribution panels and commercial electrical systems common in mid‑size facilities.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number accuracy\u003c\/strong\u003e—NGB3K040B is the best compatibility reference, so matching this exact model minimizes field issues during retrofit or replacement.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDurable Siemens engineering\u003c\/strong\u003e designed to perform reliably in demanding environments, contributing to longer service life and fewer nuisance trips.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eKey specifications\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eAmperage: 40A\u003c\/li\u003e \u003cli\u003ePoles: 3‑Pole\u003c\/li\u003e \u003cli\u003eVoltage: 347V\u003c\/li\u003e \u003cli\u003ePart number: NGB3K040B\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eIdeal use cases\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eMaintenance and replacements in 3‑phase panels that operate at 347V systems.\u003c\/li\u003e \u003cli\u003eRetrofit projects where exact Siemens specifications are required to match existing protection schemes.\u003c\/li\u003e \u003cli\u003eNew installations in facilities needing robust, three‑phase overcurrent protection for motors, conveyors, or processing equipment\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eCompatibility and installation notes\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e Confirm fit and ratings before ordering. The part number is the best reference for compatibility, ensuring the breaker matches your panel and protects your circuits as intended.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46426192183458,"sku":"NGB3K040B","price":13946.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens-ngb3k040b-circuit-breaker-40a-3-pole-347v-418.webp?v=1789530897","url":"https:\/\/www.ampstate.com\/products\/siemens-ngb3k040b-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}