[Boatanchors] OT: Fuse replacement?

[W2HX]

Warning - this is OT!

I am repairing a circuit board from an oven (one of these high tech
thingies). The company wants $400 to replace the board. But it looks like
only 1 fuse blew. Yes, it might have blown for good reasons, but I thought
Id first just try to replace it. It is soldered onto the board. These are
the markings on it:

250V   6/10A

Could this mean that for 250V it will blow at 6A but at 125V it will blow at
10A? (ie blows at 1,250W?)

The only replacement I could find in mouser says this:

125V   6A

Does this sound like a replacement? Could it be under rated? I don't mind it
being a little underrated, I would just rather not put in something
overrated.  
Thoughts?

73 Eugene W2HX