Block stu dual output transformers block stu 632x115 the block stu 63va transformer 2 x 115v is a low inrush current control safety or isolation current transformer with screw connection terminals designed with a very good switch on behaviour thanks to reduced starting currents plus high performance for the volume thanks to compact design this high quality tranfsormer also has excellent corrosion protection and low noise thanks to blockimpex vacuum impregnation block stu 632x115 63va