Connecticut Electric manufactures new high quality replacement circuit breakers for Zinsco load centers that accept Zinsco RC style circuit breakers. Circuit breakers should only be replaced with new tested and Safety Agency Listed circuit breakers, never used or refurbished ones.
From the Manufacturer
This 120/240 volt Zinsco 40 amp, double pole, thin series replacement circuit breaker is used in a Zinsco 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.
Replacement Zinsco circuit breaker manufactured new by Connecticut Electric
For use in Zinsco circuit breaker panels
Intertek ETL Listing to UL Standard 489 for US and Canada-Molded case circuit breakers
120/240 VAC 2 Pole breaker in 3/4″ body
Plug in type
May also be branded as Sylvania (ie, Sylvania RC 3840)