Fuses fuses fuses

The designer, and the U. S. distributor of, the Hi-Fi Tuning Fuse have confirmed one "fact"---that neither knows what "high breaking capacity" in terms of fuses means. That is a rather basic fuse design element, so what else don't they know about fuses? The Little Fuse engineers know what it means, and include that consideration in the design of their products. It's not a proprietary secret, it's a well-understood element in electrical engineering. Well-understood, that is, by experts in the field, of which the Hi-Fi Tuning Fuse people are obviously not. 

Oh, well, the dudes at Littelfuse never heard of fuse directionality so I guess that makes them even. You can have the Littelfuse, I’ll take the HiFi Tuning fuse. Fair enough? Little fuse? Tee, hee

Actually, I have both. But I certainly wouldn't put a HFTF in my tube power amps!

Faint heart ne'er won fair maiden. 

I did a quick google search to see if places other than the USA use a different descriptor than "high breaking capacity" in their fuses. Apparently there’s also "high rupturing capacity".

Two different types of fuses.

HRC fuses are built primarily with ceramic bodies, silver plated end caps, silver internal wire and are filled with different types of powder to prevent arcing when the wire melts on one end inside the fuse. It’s also stated to be a calibrated conductor.

Sound familiar?

The stated advantages are that they do not deteriorate with age, they clear high and low fault currents and have consistent performance.

Could it be that someone just applied the better material aspects of fuse design in HRC fuses and applied them to "normal" audio fuses with the corresponding markup our hobby enjoins?

As a novice, I’m just asking.

All the best,
Nonoise