Voltage drop across fuse - what to expect?

[FlashEF]

I'd like to use a fuse in an circuit powering a mobile robot (MicroMouse) from a LiPol battery. The fuse is going to be a protection device in case of a hard short of power lines, in order not to blow up the battery (which has no protection what so ever - its an RC hobby battery).

Fuse name:
Littelfuse 0154005.DR

Datasheet:
http://www.littelfuse.com/data/en/Data_Sheets/Littelfuse_fuseblocks_154_155.pdf

There is nothing about resistance/voltage drop of this fuse. Is is supposed to be so insignificant? My battery nominally has 7,4V so say half a volt of drop on the fuse would be really much.

[Short Circuit]

Look for the datasheet of the furnised fuse. That contains additional data, including "nominal resistance, cold ohms".

[FlashEF]

Thaks - knowing what to search it was easy to find. It has cold ohms specified in the fuse family data:

http://www.littelfuse.com/products/fuse-blocks-fuseholders-and-fuse-accessories/fuse-blocks/154/0154005_drt.aspx

For this particular one cold ohms are: 0.0136R. So the voltage drop should be really in the millivolt range.