No breaker can safely replace Federal Pacific Stab-Lok breakers inside a Federal Pacific panel because the panel itself is considered unsafe and the Stab-Lok design is fundamentally flawed, so the only safe solution is to replace the entire panel, not just the breakers. Some companies like Connecticut Electric made aftermarket replacement breakers marketed as compatible with Federal Pacific Stab-Lok panels under names like UBI or UBITBA, but electricians and safety experts strongly advise against using them because testing shows even replacement breakers may not fix the underlying bus bar and connection problems that cause failure to trip. The bus bars in Federal Pacific panels are damaged and the panel design allows breakers to appear off while still energized. The recommended replacement is a new modern panel from reputable brands such as Square D QO or Homeline by Schneider Electric, Eaton BR or CH, or Siemens, which are UL listed, widely available at Home Depot and Lowes, and have proven safety records. You should hire a licensed electrician to remove the Federal Pacific panel and install a new panel with new breakers that meet current National Electrical Code requirements. Attempting to replace individual Federal Pacific breakers is not considered a safe or code-compliant long-term solution and may void insurance.
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