Has anyone confirmed this with the manufacturer that this was their intent with their logo? The schematic symbol for a diode is cathode to anode which means negative to positive and not "plus to minus." You would have to flip the fuse to the opposite direction if you expected that configuration.
This is from the manufacturers website..Hi-Fi Tuning. they actually provide measurements for each fuse based on 'Direction 1' and 'Direction 2'. They go on to say:
"There is a measurable difference in directivity of fuses. Mostly that will be due to the way
the melting wire is manufactured. The difference is in the range of 5 % . That is in the
range of variations due to the factoring process, but the difference is measurable with all
types of fuses.
The resistance of the fuse itself is dependent on the length and thickness of the melting
wire. At pure DC- resistance measurements, of the commercial available fuses, the solder
type with leads gives the best results. Worst results gives the fuse with a glass tube and
spiral shaped melting wire.
The high end fuses all give better results in conductivity, the cryogenically treated fuses
from HiFi -Tuning give the best results, while the rhodium coated fuse from Padis gives
the highest DC- resistance..
For DC applications it´s recommended to use the solder type fuse or the cryogenically
treated fuses from HiFi-Tuning Germany..."