FBL-400 Class T 400 Amp Fuse with Block , black

We were on vacation when the solar power system in our camper failed and we weren’t able to power any of the larger appliances like the air conditioner. Thankfully, Amazon had what we needed in this fuse and holder, so we were able to get this shipped to our resort where I quickly installed it so that our vacation wasn’t ruined! A note to buyers, if you are replacing a similar unit that has blown out, you may just think that you need to buy only the fuse. However, in our case, we needed a new fuse AND holder because the holder has been designed to melt at the base of the connectors when a fuse fails for further electrical protection. Had we only bought the fuse without the holder, we wouldn’t have had what we needed to save our vacation and we would have had to return home early. That said, unscrew the pld fuse holder assembly and examine the bottom, if you see melted metal and plastic at the base of the connectors, then you need a new fuse AND holder in order to get your system up and running again. I don’t recall much in the way of directions being provided with this product. Needless to say, if you are using one of these already, then it’s pushing a dangerous level of power through it, so be sure to disconnect all batteries, inverters, and chargers in your solar system before you replace. Use a multimeter (properly rated for the application) to test all the lines coming in and out of the fuse holder in order to make sure that no current is passing through before you make a potentially lethal mistake!

Exactly what I needed for my Solar setup. The holder was exactly what I was hoping for with the hex key setup to tighten down on the wire and the cover. I was able to get it setup without any issues and am very happy with the build quality.

This is a great fuse block. It is a Deltec Co CFB2-400 fuse block/fuse with a Go Power sticker on it. Very robust construction and does what it is supposed to due. If you ever need to replace the fuse, it's a Deltec T-400 fuse (might be easier to source searching that way). Difficult to install 4/0 cable if the cable end is mushroomed from cutting. Easy trick. Cut the required amount of cable covering (insulation), but do not remove. Ring it again at half the distance and removed that end part of the cable insulation. Side the remaining half (1/4" or so) to the end of the bare cable (leaving just the tip of the cable exposed. Helps if you've lubed it with dielectric grease (which you shold be using anyway). Now the cable end is compressed enough to fit (if not, squish it a bit wit your fingers, the insulation will help it regain its proper shape/size). Push the cable in and while being careful not to let it slip out, cut and remove the remaining insulation ring. Push in the rest of the way and tighten. Hope that makes sense.

The only problem with fuse it that is very expensive. I believe in "Go Power" so I bought it. It is very heavy duty and handle 4/0 cable perfectly. I guess you get what you pay for.

It’s very heavy duty and well built, I use it with my Victron multi plus 2 inverter that I installed on my Grand design Reflection 303RLS, it works great and haven’t had any issues, going on 2 years so far.

Does what it is supposed to do!

This is a heavy-duty fuse and fuse holder for 0000 gauge wire. appears to be well made and should last. The only issue I had was getting to 0000 gauge wire into the ends. A tapered opening would have made it easier to insert the wire. I highly recommend this

Great fuse, was a little larger than I thought it would be. But the one I needed for the job. Use this on a solar install on my fifth wheel RV. Bought a total of three, included pictures of two of them that are set up.

Exactly what I ordered. Bought it on Amazon for the better price.

For $171Cdn including tax; I am surprised to find the terminal post is constructed from a softer metal than the lock washer! Bought April 4, 2016 .. But did not use until June 9, 2017. At that time I attempted to connect a 3000W Pure Sine Wave Inverter and a 3000W Modified Sine Wave Inverter in parallel to utilise the 400A Class T fuse for both. I added the positive lead from the 3000W Modified at the Class T fuse’s terminal block post. I was able to loosen the nut, add the positive lead lug and lock washer and tightened the nut. Then I changed my mind about using the 3000W Modified in parallel with my 3000W Pure. When I tried to loosen the nut; I discovered the lock washer must have stripped a thread on the terminal post and no way was it possible to unfasten the nut. It was jammed on. To salvage the block and the good portion of the screw threads at the top of the post, I had to secure the block very carefully in a vise and then very carefully remove the nut edges one by one using a hacksaw until I was able to remove the jammed nut and replace it with a nut from a #14 to 1/0 CU/AL Universal Terminal with 1/4" bolt. To by-pass the stripped thread I had to throw out the lock washer and prepare a spacer using a mechanical lug (block of 3/8" by 3/8" material with a 5/16" hole). I added dielectric grease to the post threads (to maximize spark and fire power) and the replacement nut uses about 4 threads of the post for fastening. Everything fits snuggly under the fuse block’s cover which I secured using additional layers of electrical tape. Good news ... the 3000W Pure Sine Wave Inverter works and still has 400A of fuse protection!!!

The opening will just barely fit the 4/0 cable so if you’re like me and you don’t have the expensive wire cutters to nicely cut the wire it will flare the end and won’t fit in. I used my little wire cutter pliers to nip away at the wire but that made the end flare out so it wouldn’t fit. I had to go to a store and pay them to cut my wire for me. I just hope this fuse never blows because it’s so expensive; especially if I’m camping far away.