Materials of parts        
Part: Staimless steel    
Case, Cover: Phenolic resin    
M. Arm: Beryllium Copper alloy    
Termianls: Brass    
Rivets Steel    
Contacts: Silver-Nickel alloy  

Specification:
Basic features: SPST Automatic reset
Operation: 40º C~180º C      
Electrical rating: AC250V/15A, 40A, 60A
Calibration method: Hot & cold air circulation system
Temperature rating: Operating temperature Max. 150º C
Insulation resistance: Not less than 1, 000MΩ / DC 500V
Dielectric strength: Not less than AC2, 000V/2SEC. (AC250V)