Very small in size (82 mm Dia). In same size we can also make say from 0 to 25V at 5A or 0 – 50V @ 3A and Variauto for 400 Hz applications.
These variautos are used in Instrumentation, HV Testers & Aviation (400 Hz). All the models are coated for physical protection as shown in picture. We use Roller brushes for very smooth long lasting & arc free contact.