{"product_id":"njg3b300l","title":"Siemens NJG3B300L - 300A, 3-Pole, Circuit Breaker","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Siemens NJG3B300L—a rugged 300A, 3-pole circuit breaker engineered for reliable three-phase protection in demanding environments. Designed for panelboards, switchboards, and control panels, this device ensures dependable overcurrent protection for industrial, commercial, and OEM applications where uptime and safety matter.\u003c\/p\u003e \u003ch3\u003eWhy this unit stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eThree-pole configuration\u003c\/strong\u003e delivers true 3-phase protection, simplifying wiring and coordination in complex electrical systems.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHigh current rating\u003c\/strong\u003e at 300A makes it ideal for feeding large motors, heavy-duty feeders, and critical distribution circuits.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIndustrial-grade reliability\u003c\/strong\u003e built to withstand the rigors of busy environments—fewer interruptions and straightforward maintenance in panels and control centers.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal applications and use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eDistribution panels and motor control centers that service three-phase equipment in manufacturing and processing facilities\u003c\/li\u003e \u003cli\u003eCommercial buildings with large, three-phase feeders needing robust overcurrent protection\u003c\/li\u003e \u003cli\u003eOEM equipment where a durable, configurable 3-pole breaker is required for safe, reliable operation\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhat problems it solves\u003c\/h3\u003e\n\u003cp\u003eThe NJG3B300L provides prompt, predictable interruption of faults and overloads on three-phase circuits, helping prevent damage to motors, transformers, and downstream devices. By consolidating protection in a single, standards-aligned device, it reduces panel complexity and simplifies stocking for maintenance teams.\u003c\/p\u003e \u003ch3\u003eInstallation and compatibility insights\u003c\/h3\u003e\n\u003cp\u003eDesigned to integrate with Siemens panelboards, switchboards, and control panels, the NJG3B300L aligns with common Siemens protection schemes for consistent trip characteristics and mechanical fit. When planning upgrades or replacements, confirm that your enclosure and bus configuration match Siemens’ NJG family requirements to ensure a smooth, safe installation.\u003c\/p\u003e \u003ch3\u003ePractical tips for safer, longer-lasting service\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eFollow the installation manual for correct mounting, electrical connections, and torque specifications to maintain dependable performance.\u003c\/li\u003e \u003cli\u003eUse this 3-pole breaker in applications where three-phase protection is essential to prevent unbalanced loading and equipment damage.\u003c\/li\u003e \u003cli\u003eKeep a calibrated spare on hand for quick replacement in critical panels and motor control centers to minimize downtime.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWith the Siemens NJG3B300L, you’re equipping three-phase systems with a trusted, high-capacity circuit breaker that supports robust protection across industrial, commercial, and OEM environments. It’s the right choice when reliable containment of overcurrent events in distribution panels and motor control centers is non-negotiable.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default","offer_id":46390978838690,"sku":"NJG3B300L","price":18.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/circuit_breaker_generic_551487e4-97c5-4d14-a4af-e2f563c88efa.png?v=1765381355","url":"https:\/\/www.ampstate.com\/products\/njg3b300l","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}