{"product_id":"b390","title":"Siemens B390 - 90A, 3-Pole, Circuit Breaker","description":"\u003cdiv\u003e\n\u003cp\u003eThe Siemens B390 - 90A, 3-Pole Circuit Breaker is built for dependable overcurrent protection in demanding electrical environments. With a 90-amp rating and a 3-pole configuration, this device provides true three-phase protection for panelboards, switchboards, and control panels, making it an ideal choice for industrial, commercial, and OEM applications.\u003c\/p\u003e \u003ch3\u003eKey benefits that matter in real-world installations\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003e90A current rating\u003c\/strong\u003e – Robust protection for main feeders and branch circuits in medium-to-large distribution panels, helping prevent damage from overcurrents.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3-Pole design\u003c\/strong\u003e – Ensures synchronized interruption across all three phases, which is essential for safe operation of three-phase motors and equipment.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile installation\u003c\/strong\u003e – Suitable for panelboards, switchboards, and control panels, aligning with diverse electrical layouts used in industrial facilities.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSiemens engineering\u003c\/strong\u003e – Seamless integration with Siemens electrical ecosystems, simplifying maintenance and replacement in existing installations.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eReliable protection\u003c\/strong\u003e – Delivers consistent overcurrent protection to safeguard wiring, devices, and motor control centers from fault conditions.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-ready option\u003c\/strong\u003e – A practical choice for equipment manufacturers needing a trusted 3-pole breaker that can be incorporated into new builds or retrofits.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eMotor control centers (MCCs) and distribution panels where three-phase protection is critical for motor reliability.\u003c\/li\u003e \u003cli\u003eIndustrial and commercial panel installations requiring a durable, high-current circuit-breaker compatible with existing Siemens gear.\u003c\/li\u003e \u003cli\u003eOEM equipment assemblies that demand a dependable 3-pole breaker to meet robust protection standards.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eIn practice, the Siemens B390 90A 3-Pole Circuit Breaker helps you maintain safe operation and electrical reliability in everyday workflows—whether you’re upgrading an aging panel, designing a new distribution solution, or equipping a motor-driven system in an industrial setting. When selecting protection for three-phase circuits, choose the B390 for a trusted Siemens solution that aligns with your panelboards, switchboards, and control panels.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default","offer_id":46390541910178,"sku":"B390","price":259.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/circuit_breaker_generic_57b01249-4456-47b1-86a1-ed5d24e5398a.png?v=1765377053","url":"https:\/\/www.ampstate.com\/products\/b390","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}