EPC2035 Minimum Operating Frequency

I want to know EPC2035 minimum operating frequency.

EPC2035 is a discrete GaN FET, therefore it does not have a minimum operating frequency. It can work in DC also.
You might also want to take a look at our website which contains several resources for training, including GaN University (epc-co.com) and GaN First Time Right (epc-co.com)