Block ste 400v 24v transformers block ste 63 4 24 the block 63va transformer 24v is a low inrush current control safety or isolation current transformer with cage clamp 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 ste 63 4 24 63va transform