Connecticut Electric manufactures new high quality replacement circuit breakers for Challenger load centers that accept Challenger Type A style circuit breakers. Circuit breakers should only be replaced with new testd and Safety Agency Listed circuit breakers, never used or refurbished ones.
From the Manufacturer
This 120 volt Challenger "A" Series 20 amp, single pole, With Right Side Clip, replacement circuit breaker is used in a Challenger load center. Typical applications, up to 2,200 watts, include kitchen circuits, branch circuits, wall receptacles, electric heaters (up to 1,650 watts), dishwashers, refrigerators, freezers, washing machines, window air conditioners (110V, up to 5,500 BTU) and electric motors (3/4 hp to 1-1/4 hp). These are only suggested applications and cannot assure compliance with all local codes. Please check local electrical codes before starting any electrical project.