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By certification 
Specifications:
Type Rated thermal current (A) Rated operating current at AC 3 380V (A) Rated operating current at 660V (A) The power of controlled motor (KW) Type of auxiliary contact
380V 660V
3TB40 20 9 3.33 4 5.5 1NO
3TB41 20 12 4.33 5.5 7.5 1NC
3TB42 30 18 7.77 7.5 11 1NO+1NC
3TB43 30 22 8.5 11 11 2NO+2NC
3TB44 45 32 12 15 23 2NC+2NO
Type Rated thermal current (A) Rated operating current at AC 3 380V (A) Rated operating current at 660V (A) The power of controlled motor (KW) Type of auxiliary contact
380V 660V
3TB40 20 9 3.33 4 5.5 1NO
3TB41 20 12 4.33 5.5 7.5 1NC
3TB42 30 18 7.77 7.5 11 1NO+1NC
3TB43 30 22 8.5 11 11 2NO+2NC
3TB44 45 32 12 15 23 2NC+2NO
