Amazon : Blue Sea Systems ST Blade Fuse Block - 12 Jul 19, 2015I have always used Blue Sea Systems fuse blocks due to their rugged design, ability to withstand moisture, and there ease of use. The fuse block is rated up to 100 amps and I will always place a reset-able fuse between the battery and the fuse block.4.7/5(1)Price: $39 Amazon: blue sea fuse block Amazon: blue sea fuse block. Skip to main content. Blue Sea 5026 ST Blade Fuse Block w/Cover - 12 Circuit w/Negative Bus - 1 Year Direct Manufacturer Warranty. 5.0 out of 5 stars 3. $49 $ 49. 93. FREE Shipping. Blue Sea 5025 ST Blade Fuse Block w/Cover - 6 Circuit w/Negative Bus.