... thermal overload relay 3UA thermal overload relay can be used with 3TF/3TB contactor,also can be installed as single unit.3UA thermal relay series are suitable for overload ... ~2,1.6~2.5,2~3.2,2.5~4,3.2~5,4~6.3,5~8,6.3~10,8~12.5 3UA52 25 660 0 ... ,1.6~2.5,2~3.2,2.5~4,3.2~5,4~6.3,5~8,6.3~10,8~12.5,10~16,12.5~20,16 ... ,1.6~2.5,2~3.2,2.5~4,3.2~5,4~6.3,5~8,6.3~10,8~12.5,10~16,12.5~20,16 ...