{"product_id":"siemens-f3b040","title":"Siemens F3B040 40A 3-Pole Circuit Breaker","description":"\u003cdiv\u003e\n\u003cp\u003eEngineered by Siemens, the \u003cstrong\u003eF3B040\u003c\/strong\u003e \u003cem\u003e40A 3-Pole Circuit Breaker\u003c\/em\u003e delivers dependable protection for three-phase electrical systems. With a 40 amp rating, it quickly detects overloads and faults, interrupting power to prevent equipment damage, reduce downtime, and enhance overall safety in industrial and commercial environments.\u003c\/p\u003e \u003cp\u003eDesigned for precise compatibility and straightforward replacement, this OEM Siemens part number \u003cstrong\u003eF3B040\u003c\/strong\u003e is ideal for panels and enclosures that require a reliable 3-pole, 40-amp solution. It’s a smart choice when upgrading existing Siemens gear or stocking spare breakers to minimize service interruptions.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eThree-pole (3-phase) protection\u003c\/strong\u003e supports balanced loads in larger, three-phase systems common to motors, conveyors, HVAC units, and processing equipment.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e40 A current rating\u003c\/strong\u003e suits mid-range motor circuits and heavy-duty control circuits without oversizing downstream conductors.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eExact fit and compatibility\u003c\/strong\u003e with Siemens panels and installation configurations, helping ensure consistent trip characteristics and reliable performance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDurable, dependable build\u003c\/strong\u003e designed for the demands of commercial and light-industrial settings, delivering predictable disconnection during faults.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM replacement part\u003c\/strong\u003e supports efficient maintenance, reducing guesswork and ensuring continued system integrity within Siemens ecosystems.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eThis breaker is particularly well-suited for facilities where 3-phase protection is essential—think manufacturing floors, data centers with heavy equipment, or large commercial HVAC installations. It offers a clear migration path for engineers and electricians looking to align with Siemens standards while maintaining safe, compliant electrical distributions.\u003c\/p\u003e \u003cp\u003eTo ensure optimal performance, confirm that your panel’s bus configuration and ratings are compatible with a 3-pole, 40A device and that the installation adheres to all local electrical codes. The Siemens F3B040 stands out as a practical, durable choice for reliable three-phase protection that keeps critical systems up and running.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46423252631714,"sku":"F3B040","price":510.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_229276d9-908d-46df-93e5-6fe31866e0ff.png?v=1765492975","url":"https:\/\/www.ampstate.com\/products\/siemens-f3b040","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}