{"product_id":"siemens-jj3f400-circuit-breaker","title":"Siemens | JJ3F400 | Circuit Breaker | 400A | 3-Pole | 600V | Bolt-On","description":"\u003cdiv\u003e\n\u003cp\u003eIntroducing the Siemens JJ3F400 Circuit Breaker—an industrial-grade 400A, 3-Pole, 600V bolt-on breaker built to safeguard critical power feeds and support demanding electrical distribution setups. Designed for maintenance, retrofit, and replacement where exact specifications are essential, this unit preserves system protection without compromising panel compatibility.\u003c\/p\u003e \u003cp\u003eWhy this unit stands out:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eCurrent rating:\u003c\/strong\u003e 400A ensures appropriate protection for high-load feeders and subpanels.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePole configuration:\u003c\/strong\u003e 3-Pole design supports three-phase circuits common in commercial and industrial environments.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 600V nominal, suitable for medium-voltage distribution within the typical building electrical system.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Bolt-On mounting for secure, field-installable replacement in compatible enclosures.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eReference:\u003c\/strong\u003e Part number JJ3F400 is the most reliable compatibility reference; always cross-check with your panel’s data plate or Siemens catalog.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eThis breaker is ideal for:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eMaintenance of Siemens distribution panels needing exact replacement parts to minimize downtime.\u003c\/li\u003e \u003cli\u003eRetrofits or upgrades where existing equipment requires a 400A, 3-pole, 600V bolt-on device.\u003c\/li\u003e \u003cli\u003eSpare inventory for service crews that support large commercial or industrial facilities.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eCompatibility and installation tips\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eBefore ordering, confirm fit and ratings against your panel's data plate and Siemens product catalog.\u003c\/li\u003e \u003cli\u003eUse the JJ3F400 as the primary compatibility reference; keep the exact part number handy during procurement.\u003c\/li\u003e \u003cli\u003eEnsure proper safety procedures: disconnect power, use lockout\/tagout, and follow local electrical codes during replacement.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWith Siemens JJ3F400, you maintain dependable protection for three-phase systems while preserving the intended coordination and protection scheme of your facility’s electrical distribution.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46427517681826,"sku":"JJ3F400","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\/siemens-jj3f400-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}