From the Manufacturer: This 120/240 volt Zinsco 50 amp, double pole, thick series replacement circuit breaker is used in a Zinsco load center. Typical applications, up to 22,000 watts, include electric ranges (15 KW - 21 KW), electric ovens and central residential air conditioners (240 Volt, 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. This 120/240 volt Zinsco 50 amp, double pole, thick series replacement circuit breaker is used in a Zinsco load center. Typical applications, up to 22,000 watts, include electric ranges (15 KW - 21 KW), electric ovens and central residential air condition 1-1/2" ,50 amp 120/240 vac ,Non-interchangeable ,10 000 AIR ,Switch indicator ,Plug-in ,Fits Zinsco panels ,Standard overload and shor circuit protection in Zinsc load centers ,ETL listed ,HACR rated ,Bulk