Connecticut Electric 1/2 In. 20A Single-Pole Circuit Breaker for Federal Pacific is designed specifically as a for Federal Pacific breakers. It is classified and for use in Federal Pacific load centers, ensuring compatibility and safety. This circuit breaker is ETL listed, which means it has undergone testing and meets the required safety and performance standards. When replacing a circuit breaker, it is important to ensure compatibility with your specific electrical panel or load center. Federal Pacific load centers have their unique specifications, and using a compatible breaker helps maintain the safety and reliability of your electrical system. Model Number: VPKUBIF020N