Your components power supply fuse that is between the wall socket and your component's power supply conducts current in both direction during 1 cycle, because we are using alternating current
The current will flow from the wall through the fuse to the component's transformer ... reverse and then flow from the Transformer back through the fuse to the wall socket to complete 1 cycle
It appears that the current has to flow in and out and through the fuse in both direction to complete 1 cycle ... either 60hz/USA or 50hz/International
With a normal fast acting fuse I doubt that directionality matters or has an effect ... however
On a slow blow or time delay fuse with the springy thing in one end ... it may matter as the springy thing is meant to cushion the incoming current rush
The current will flow from the wall through the fuse to the component's transformer ... reverse and then flow from the Transformer back through the fuse to the wall socket to complete 1 cycle
It appears that the current has to flow in and out and through the fuse in both direction to complete 1 cycle ... either 60hz/USA or 50hz/International
With a normal fast acting fuse I doubt that directionality matters or has an effect ... however
On a slow blow or time delay fuse with the springy thing in one end ... it may matter as the springy thing is meant to cushion the incoming current rush