... 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 ... insulation voltage (V) Current Setting range (A) 3UA50 12.5 660 0.1~0.16,0.16~0.25 ... 3,5~8,6.3~10,8~12.5,10~16,12.5~20,16~25 3UA54 32 ... 4~6.3,6.3~10,10~16,12.5~20,16~25,20~32 3UA58 80 ... 3,5~8,6.3~10,8~12.5,10~16,12.5~20,16~25,20~32, ...