Blue Sea Systems 5035 ST Blade Fuse Block - Six Independent Circuits with Cover, 100 Amps

I bought the Blue Sea Systems ST Blade Fuse Block (6 Circuits, with Cover, no Negative Bus Bar) to expand the 12V coach power network in my RV. Compared to similar 6-circuit fuse blocks from other brands, this one is a bit larger and definitely more expensive—but in my opinion, it’s worth it.The build quality is excellent. It feels solid and well-made, unlike some of the flimsier alternatives I’ve used before. Installation was straightforward, and it works exactly as advertised.Given how critical a fuse block is in any power distribution setup, I think spending a little more for something this robust and reliable is a smart move.

I am using this for a 12V subpanel in my Van conversion rebuild. With 12 circuits available there is plenty of room for my needs, and it forces me to be neat with my wiring. This is well designed and made. The included labels help keep things orderly. It came with 1 fuse, which I thought was amusing, but in hindsight, it just may help someone purchase the correct fuse type for the box.

Nice little compact fuse block.

This was the third fuseblock I tried in modifying the inadequate fusing of my 1957 MGA (it's British; what did you expect?). This was far and away the best of the lot -- robust in all respects, solidly mounted, simple. The others were quite wimpy and rattly in comparison. This one has an honest 100 amp copper bus bar and a binding post that can handle whatever you put into it. I liked that it was possible to disassemble and modify it to be more useful to my purposes; viz., I hacksawed the bus bar in order to have two buses, one fed at the post by battery to service a pair of circuits (horn), and then backfeed the (unfused) ignition switch onto the remaining section to power coil, heater blower, fuel pump, etc., that then became individually fused. I like that the fused outputs are via binding posts rather than quick-connect push-ons; those crimped ring wire terminations are not going to fail! And I regard this installation as one that I am not going to change in a long time.Although this is marketed as a marine-application fuseblock, and has something of a cover, I would not rely on its being at all watertight -- but that's just fine for my application and maybe yours. In fact I just deleted the cover entirely for my situation.I am thoroughly enamored of this piece of equipment and am recommending it to others in my MG car club. I will own up to the reason I find myself here... Original wiring of the car had coil and fuel pump unfused. When installing a new fuel line I screwed up and that metal fuel line had residual tension in it that caused it to jump into contact with the hot terminal of the fuel pump. Thus I smoked the wire and had to replace it. But I resolved to put a damn' FUSE into each of the many circuits, and I breathe far more easily now. It's a neat and tidy solution, far more organized than the multiplicity of in-line fuses that was my initial approach.

Overall this is a great product. It is mostly thoughtfully designed and well made. Ultimately it does what it claims: You get 12 fused circuits and 12 ground terminals. You must supply your own fuses and mounting bolts/screws which is fair.I do have some complaints about this product. First, the plastic latch for the lid doesn't work well. On the unit I received, the lid doesn't click in place firmly and doesn't stay attached firmly. The lid should have a screw to fasten it to the base so that the lid stays on firmly.The other problem is that the mounting screw holes for the base are too small. They should accomodate 3/16" bolts or screws so that people have a better chance of using mounting hardware they already have on hand.I would like to see this product built to handle a higher amperage with thicker positive and negative input terminals., however for the price of this, $27.11 in May 2025, this is a great product.

I bought this to add another fuse panel to my Nitro boat. It was easy to install, the quality seems very good, and it has a very fair price as well. I've been running this on my boat for a year with absolutely no problems! Highly recommend!

First off, Blue Sea Systems products seem very well made and I am pleased with the products that I have purchased. I purchased this product for a project I am currently working on. I have a vehicle with a 6V electrical system. I wanted 12V to power other decvices and I wanted to be able to fuse both the 6V and 12V circuits. This product has a split buss that allows for 6 circuits on each of the 2 busses which allowed my to connect two different voltages one on each bus. I used a 6v to 12V boost converter then attached the 12V to one bus and the original 6V to the other. Both busses share common ground connections which I found very convenient. I also like the clear plastic cover so you can see the blade fuses. And with easeyID fuses, with leds that illuminate when a fuse is blown, it is quick and easy to identify which fuse needs replacing. Over all I am totally pleased with the quality and cost of this product. I would, and have already purchased more than one of these devices and would recommend it to others.

I used this to safely, cleanly add more circuits to an older vehicle. The split-circuit design was exactly what I needed, because I needed some circuits on battery power, like the radio clock, and some circuits on ignition only, like gauges. It was probably twice as big as I needed, which caused some mounting challenges, but it was helpful to have terminals accessible from both sides. The grounding block also wasn't strictly needed in a car, because you can ground anything to the vehicle body, but it did simply wiring. I found the block to be very sturdy and well-made, and the cover adds another layer of protection. Finally, the built-in fuse puller and spare fuse holder is a good "just in case" feature.