This should be a very basic question. I searched enough but was not able to find a direct answer. Can i replace a axial through hole inductor of a filter network in a RF circuit with a SMD of same value? Circuit specifies a 0.33uH axial molded inductor which is very hard to find now. Please help.
Cheers!
Yes you can, there are some imporatant specs to pay attention to, one is dc current capacity, this should be the same or higher, and another self resonance, it depends on the application but similar or higher is usually ok.
The OP said it's part of an RF filter, hence a signal inductor, unless it's part of a high power transmitter output matching network. But, I suspect not.
The peak Q frequency would matter depending on the gain of the semiconductors downstream. Also whether the inductor is shielded from other magnetic influences nearby etc.
This might help. https://rf-filter-circuits.blogspot.com/