{"product_id":"schneider-electric-nb400n-circuit-breaker","title":"Schneider Electric | NB400N | Circuit Breaker | 400A | 3-Pole | 690V","description":"\u003cdiv\u003e\n\u003cstrong\u003eSchneider Electric NB400N Circuit Breaker\u003c\/strong\u003e — a robust, high-capacity protection device designed for demanding industrial environments. With a 400 A rating across three poles and a 690 V interrupting capability, the NB400N is purpose-built for maintenance, retrofit, and replacement projects where precise specifications and dependable protection matter. \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmpere rating:\u003c\/strong\u003e 400 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3-Pole configuration for balanced three-phase protection\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 690 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eReference compatibility:\u003c\/strong\u003e Part number NB400N is the best reference for ensuring fit and compatibility\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBest-use scenarios:\u003c\/strong\u003e Ideal for maintenance, retrofit, and replacement where matching Schneider Electric specs are required\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhy choose the NB400N for your electrical protection needs? This circuit breaker is engineered to reliably interrupt fault currents in three-phase systems, helping to safeguard motors, drives, and switchgear from damage and unplanned downtime. It’s not just a drop-in replacement—it's a precise fit for panels and systems designed to accept the NB400N, delivering consistent performance in mission-critical environments.\u003c\/p\u003e \u003ch4\u003eUse cases and ideal applications\u003c\/h4\u003e\n\u003cul\u003e \u003cli\u003eMaintenance tasks on aging or upgrading industrial panels that require a 400 A, 3-Pole, 690 V device\u003c\/li\u003e \u003cli\u003eRetrofit projects where existing gear expects Schneider Electric NB400N specifications\u003c\/li\u003e \u003cli\u003eReplacement of failed breakers in high-demand manufacturing lines, data centers, or processing facilities\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eKey benefits and practical considerations:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003ePrecise compatibility:\u003c\/strong\u003e Always verify fit and ratings before ordering; the NB400N is the clearest reference for this exact configuration.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThree-phase protection:\u003c\/strong\u003e The 3-Pole design ensures synchronized fault interruption across all phases, improving overall electrical safety and system reliability.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHigh-voltage suitability:\u003c\/strong\u003e With a 690 V rating, it’s well-matched to industrial power distributions and high-voltage switchgear common in mid-to-large facilities.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eClear maintenance path:\u003c\/strong\u003e Using the exact part number NB400N simplifies spare parts planning and future service, reducing downtime during replacements.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eThis Schneider Electric NB400N circuit breaker is crafted for professionals who value precise specifications, dependable protection, and a straightforward path to retrofit or replace components in demanding electrical installations. If your system requires a 400 A, 3-Pole, 690 V circuit breaker with a Schneider Electric pedigree, the NB400N offers clarity, reliability, and peace of mind for ongoing operations.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Schneider Electric","offers":[{"title":"Default Title","offer_id":46427508965538,"sku":"NB400N","price":510.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_ad06fdd7-931c-4a09-bfbe-d05329579cd6.png?v=1765492978","url":"https:\/\/www.ampstate.com\/products\/schneider-electric-nb400n-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}