Blue Sea Systems 5023 ST Blade Battery Terminal Mount Fuse Block

  (2 Reviews)
Price:  £22.58   (£18.82 Exc. VAT)

Product code:  P03605
Brand:  Blue Sea Systems
Ignition Protected  Yes



6 in stock

This 5023 ST-Blade Battery Terminal Mount Fuse Block from Blue Sea Systems provides a convenient and compact method of fusing directly at the positive battery terminal. This is ideal for those circuits that need to be permanently powered for safety or convenience e.g. bilge pumps, gas alarms, USB power socket, stereo memory etc.

The block consists of a tin-plated copper busbar with a 10mm hole that can be bolted to an M10 battery terminal, and 4 individual standard blade fuse slots with screw terminals to connect the loads. The clear lid of this fuse box provides ignition protection for safe use around fuels.

The advantage of fusing directly at the battery terminal is that it completely eliminates any unprotected section of cable between the battery terminal and the fuse block.

Includes 4x ring terminals (2x for 1.5-2.5mm² cable & 2x for 3-6mm² cable), 4x write-on labels and a spare terminal screw.

Note: Fuses not included - click here. Circuit identification labels available separately - click here.


  • 32V max. voltage
  • 100A rating for the block
  • 30A rating per circuit
  • Ignition protected

Further information

This fuse block is also available as a kit, complete with a corresponding negative busbar and insulating cover - click here

  • No. circuits: 4
  • Voltage rating: 32V DC max.
  • Current rating: 100A per block, 30A per circuit
  • Fuse type accepted: Standard blade (ATO/ATC)
  • Terminal screw size: #8-32 (M4) with captive star lock washers
  • Mounting hole size: Clearance for M10 stud (3/8")
  • Dimensions: 91.3 (L) x 43.8 (W) x 32.5 (H) mm
  • Busbar material: Tin-plated copper
  • Ignition protected: Yes
  • Standards/specifications met: ISO 8846 Marine, SAE J1171 Marine
  • Manufacturer's part no: 5023

Part Number:  5023B-BSS

Bar Code:  632085502393

Average Rating (2 Reviews):  
Write a Review and share your opinions!

Great piece of kit
26 September 2023  | 

This is exactly what was needed to fuse a multi circuit lighting arrangement in our clubhouse. Easy to attach to the terminal clamp, one with a pillar and nut. I used standard UK-size 10A blade fuses from 12vP which are a little too tall to fit the block cover cap on again properly but given the battery’s out of reach to present a hazard, having the cap resting loosely is good enough.

Battery fuse terminal
19 July 2023  | 

Great product, Would buy again. Fast delivery


Thank you for the great feedback George!

Blue Sea Systems

Blue Sea Systems is a US-based company designing and manufacturing high-quality components and accessories for the demanding environments of the marine and specialised vehicle markets. Its range consists of over 1000 products, designed to work together as a fully integrated system.

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