Blue Sea MRBF Fuse Block opinions?

seachicken

seachicken

Well-Known Member
Does anyone use these MRBF Surface Mount Fuse Blocks: https://www.bluesea.com/products/5196/MRBF_Surface_Mount_Fuse_Block_-_Common_Source

HC doesn't show them on the web site, makes me wonder if theres a reason they don't stock them? Figure it would be good in the battery compartment for protection on the feeder wires to my 2 fuse panels in the cutty running lowish loads (100 and 40 amps). In my case it will clean up the battery compartment a bit eliminating a midi block and resettable breaker. Fuses are a little pricy at $20-50 CAD on Amazon, $20 USD on eBay and I would want spares.
 
no i mean T fuses. problem is youre right on the threshold of a t fuse at 100 amps. so i would get an ANL fuse for the 40 amp and a T fuse for the 100amp circuit. a 110amp t fuse should be fine.
the MRBFs tend to melt at currents over 15 amps. they are really only for peak spike currents not continuous. The ANLs are ok at up to 50 amps but quite frankly only the T fuses handle large currents due to their massive blocks. if youre planning to pull 40 amps all the time i would bite the bullet and get a t fuse - https://www.eaton.com/us/en-us/cata...ers/bussmann-series-class-t-fuses.html#models these guys will have some in close to that range. or this one - https://www.littelfuse.com/products...es/ul-class-fuses/class-t-fuses/jlls/jlls040p
i have bought from both those vendors so they are pretty solid.
 
Last edited:
zurk said:
no i mean T fuses. problem is youre right on the threshold of a t fuse at 100 amps. so i would get an ANL fuse for the 40 amp and a T fuse for the 100amp circuit. a 110amp t fuse should be fine.
the MRBFs tend to melt at currents over 15 amps. they are really only for peak spike currents not continuous. The ANLs are ok at up to 50 amps but quite frankly only the T fuses handle large currents due to their massive blocks. if youre planning to pull 40 amps all the time i would bite the bullet and get a t fuse - https://www.eaton.com/us/en-us/cata...ers/bussmann-series-class-t-fuses.html#models these guys will have some in close to that range. or this one - https://www.littelfuse.com/products...es/ul-class-fuses/class-t-fuses/jlls/jlls040p
i have bought from both those vendors so they are pretty solid.
Click to expand...

Ok thanks for the insight, I see what you are saying. I've been reading up on Ampere Interrupt Capacity ratings on fuses... Sense it makes.

 
You must log in or register to reply here.

Similar threads

C
Blue Seas Safety Hub 100 Ignition Protected Fuse Panel
Replies
1
Views
510
chille51
C
Back
Top