Blue Sea Systems
Blue Sea 5026 ST Blade Fuse Block wiring diagram
12-circuit ATC/ATO blade fuse block with integrated negative bus and cover. 100 A max per block, 30 A per circuit, 32 V DC max.
Wiring diagram
How the BS 5026 is wired.
Open this example in Crimp to use your own parts and cable lengths. Review the assumptions and installation notes as you adapt the circuit.
Cable sizing for this example
Use the diagram as a starting point for your installation. Replace the example equipment and cable lengths with your own, and check the connections against your exact model's instructions.
Cable sizes depend on the connected equipment, current and cable lengths. Add those details in Crimp to size each run.
Installation notes
Before you install.
Open a question for model-specific guidance and sources.
Verified against the manufacturer's documentation, checked 2026-09-11. Manufacturer documentation →
Where does the 5026 fit in a house system?
The Blue Sea 5026 has twelve ATO/ATC positive branches and an integrated negative bus. The manufacturer's specifications limit the complete block to 100 A, each circuit to 30 A, and voltage to 32 V DC. These are ceilings, not recommended fuse ratings. Fuses are sold separately.
The 5026 wiring schematic separates the positive feed, fused branch connections and negative returns. Main battery-feed protection remains a separate design decision. Check actual fuse interrupt ratings against the battery and upstream protection; a blade fuse's amp rating alone does not verify this.
Can I open a complete wiring example?
The campervan and RV solar systems put two load branches on this panel and open the displayed diagram in Crimp. For a simpler distribution layout, the dual-battery charging systems use a compact generic fuse block. The examples retain the engine's protection findings for a placeholder lithium bank; resolve the actual bank and protection before building.
Fit check
Connect it to the rest of your system.
Describe your setup to draft a system with 5026 connected. Review the selected parts and cable lengths, then edit the diagram in Crimp.
The model only picks parts and draws the connections. Every wire size and fuse rating still comes from Crimp's own sizing, never from the model.
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Technical reference
Specifications and terminal map.
Check the model, ratings and connection points against your own unit before choosing installation hardware.
Catalog specification
12-circuit ATC/ATO blade fuse block with integrated negative bus and cover. 100 A max per block, 30 A per circuit, 32 V DC max.
Connection limits are listed in the terminal map. Use the manufacturer's documentation for the full specifications.
Terminal map
Catalog connection points, current direction and planning limits. Check the manufacturer's pinout and connector ratings before installation.
IN +
positive · input
IN −
negative · bidi
1
positive · output
2
positive · output
3
positive · output
4
positive · output
5
positive · output
6
positive · output
7
positive · output
8
positive · output
9
positive · output
10
positive · output
11
positive · output
12
positive · output
1
negative · bidi
2
negative · bidi
3
negative · bidi
4
negative · bidi
5
negative · bidi
6
negative · bidi
7
negative · bidi
8
negative · bidi
9
negative · bidi
10
negative · bidi
11
negative · bidi
12
negative · bidi
Sources and sizing method
Equipment specifications. Model details, ratings and terminal roles come from the catalog. Check your unit’s label and current manufacturer documentation for its exact revision.
Example sizing. Wire sizes and fuse ratings apply to the connected example, not a fixed cable size for this component. Set your actual equipment, current, lengths and installation conditions in Crimp before choosing hardware.
Read how the sizing worksNext step
Plan your installation with BS 5026.
Open this example as a new project, or add this component to your existing diagram. Use your equipment and cable lengths to review the sizing.
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