I am designing an unregulated power supply to power a few linear voltage regulators, as shown in the image. The power supply will use a 230vac to 9vac 2 coil step down transformer. Since the power supply will supply 20kHz and 50MHz digital communication protocols, I intend on putting a safety cap at the primary coil for EMC and EMI purposes. I was wondering on whether should I put the fuse before the cap or after it.
On one hand, putting the fuse before the safety cap will protect the primary coil and the safety cap as well, should it break short in the future(class X2). On the other hand I think I am risking on blowing the fuse in cases where the supply is powered at the peak of the 230VAC sine wave. It is a slow blow(time delay) fuse twice the rated current of the power supply.
If I want to avoid blowing the fuse from inrush current, then putting it after the safety cap is the most sensible option. However, should the safety cap fail short in the future, I am risking a short circuit which will rely upon the circuit breaker of the 230VAC house distribution cabinet.
I have already seen a product on the market that has the fuse implemented after the safety cap which I guess is ok, since the main reason that cap is called "safety" is because it should not fail so easily. I am just asking for a second opinion from someone who's worked on similar stuff.