From the Manufacturer
This 120/240 volt 'Interchangeable' 45 amp, double pole replacement circuit breaker is typically used in a Thomas & Betts load center. Typical applications, up to 8,800 watts, include electric baseboard heat, fan forced heat and 240 volt air conditioners (up to 23,000 BTU). These are only suggested applications and cannot assure compliance with all local codes. Please check local electrical codes before starting any electrical project.