{"product_id":"sjk3f400-circuit-breaker","title":"SJK3F400 | Circuit Breaker | 400A | 3-Pole | 600V","description":"\u003cdiv\u003e\n\u003cp\u003eThe SJK3F400 is a rugged industrial circuit breaker engineered for demanding electrical environments. With a 400A rating, three-pole construction, and a 600V capacity, this unit delivers reliable three-phase protection for high-current systems—from heavy machinery to centralized power distributions.\u003c\/p\u003e \u003cp\u003eKey benefits you’ll feel in real-world operations:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003ePrecise three-phase protection\u003c\/strong\u003e: The 3-pole design safeguards all three phases, helping prevent imbalances that can stress motors and drives.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHigh-current reliability\u003c\/strong\u003e: At 400A, this breaker is built to interrupt and isolate faults in heavy-load circuits, keeping equipment safe and downtime minimal.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile industrial compatibility\u003c\/strong\u003e: Suited for distribution panels, motor control centers, and retrofit projects where 600V systems are standard.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eSpecifications at a glance\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eAmperage: 400 A\u003c\/li\u003e \u003cli\u003ePoles: 3-Pole\u003c\/li\u003e \u003cli\u003eVoltage: 600 V\u003c\/li\u003e \u003cli\u003ePart number reference: SJK3F400\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this unit stands out for maintenance, retrofit, and replacement\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eMaintenance-ready design\u003c\/strong\u003e: Built to endure routine cycling in service entrances and enclosures, making it a dependable choice for ongoing upkeep.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e Retrofit-friendly\u003c\/strong\u003e: When upgrading panels or replacing aging breakers, the SJK3F400 aligns with common 3-phase architectures and 600V deployments, reducing installation surprises.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eClear compatibility reference\u003c\/strong\u003e: The part number SJK3F400 is the most reliable guide for matching your panel, bus design, and protective coordination.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical guidance for best results\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eAlways confirm fit and ratings before ordering. Use the SJK3F400 as your primary compatibility reference to avoid mismatches.\u003c\/li\u003e \u003cli\u003ePlan for proper coordination with neighboring protective devices to ensure selective tripping and minimal disruption during faults.\u003c\/li\u003e \u003cli\u003eInspect mounting and termination styles in your enclosure prior to installation to ensure secure, code-compliant connections.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhether you’re upgrading an existing installation, retrofitting a legacy panel, or stocking spares for critical lines, the SJK3F400 delivers dependable 400A, 3-Pole, 600V protection with a focus on longevity and operational continuity. For the right fit, reference your OEM documentation and verify that this exact part number matches your panel and distribution design.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"AmpState","offers":[{"title":"Default Title","offer_id":46427237974178,"sku":"SJK3F400","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\/sjk3f400-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}