Quoted from Arcade:The 312008 is obsolete and NLA and was just a FB fuse without the flat blade inside.
The Busmann AGC-8 looks to be just a standard FB fuse you can get anywhere.
I'm just wondering why every machine I have seen, comes with those flat blade fuses in that slot and not anywhere else on the board.
On the Williams Fuse chart is calls for all FB and SB fuses except for one spot. It always has a specific 8A 32V NB fuse called for in that spot.
I'm sure that just putting a regular fuse in that spot is fine, just wondering why it is specifically different.
312008's are still made -- I buy boxes of 312 series fuses pretty much every month. Need complete part number to get to current ones such as 312008.HXP for fast glass, 8 amp, RoHS compliant (XP suffix), box of 100 (H in suffix). Or 312008.MXP for box of 1000. But when sold as individuals, the "H" and "M" are dropped. Also, for reason only Littelfuse knows, they also added a zero ahead of the part number so that it would be 0312008 but most people ignore the preceeding zero.
Not sure what you mean by blade fuse. All I can think of is automotive blade fuse - ugly plastic buggers. 312008's and MDL-8's are 100% identical other than different manufacturer.
FB and NB are used synonymously in this line of work. As far as we're concerned - FB = NB.
The high current fuses normally have a lower voltage rating. Few years ago, used to be 10 amps and above were rated 32V.... now I think 12A and above are rated at only 32V and everything less is 250V (MDL and 312s). Although it predates me, I wouldn't doubt it if the 8 amp fuses were only rated up to 8 amps in the not too distant past. Always ok to go higher in voltage rating.