Putting a capacitor across the drain-source

[imsmooth]

Other than some power loss, is there anything wrong with just putting a capacitor across the drain-source, instead of a resistor/capacitor?

 

[berkeman]

Other than some power loss, is there anything wrong with just putting a capacitor across the drain-source, instead of a resistor/capacitor?

In what kind of circuit? Can you give more details about the application, and maybe link to an example schematic?

 

[imsmooth]

Here is the page with the schematic

http://inductionheatertutorial.com/inductionheater/induction10.html

It is the schematic near the bottom with the mosfets. I know that a 3300pf capacitor across the g-s leads significantly removes ringing. I just want to know if this is a problem by not using a resistor.

 

[mdjensen22]

The following links are references I have found useful when working with Snubber circuits.
There is some information in the first link that directly discusses a capacitor only snubber. http://www.hagtech.com/pdf/snubber.pdf
http://www.fairchildsemi.com/an/AN/AN-4147.pdf
http://focus.ti.com/lit/ml/slup169/slup169.pdf
http://www.newark.com/pdfs/techarticles/cornell/design.pdf

 

[Mike_In_Plano]

In some cases, you do put a bit of capacitance in, especially in resonate outputs.
For the most part, though, adding capacitance is not good. It adds 1/2 V^2 C loss, drops the switching efficency, and usually doesn't help with the waste energy. This appears to be a series resonate circuit, so, with enough dead time, they might help.
Generally though, I'd aim to make the circuit and transformer a little tighter (less leakage L)

Mike