What size ring connector is needed to attach wire to terminals?

They are #8 as described in the description. Hard to find #8 rings in heat shrink connectors. #10 worked just fine for the terms and it seems all manufacturers sell this size.

Can I run +/- from batt to 100 amp breaker then +/- to fuse box so I can kill power to fuse box?

Yes you can. The fuse box will be powered off breaker. I used a toggle switch panel instead of a main breaker.

Product page says this can handle 100 amps per block, does that mean 100 amps on the left 6, and another 100 on the right?

No, it means 100a peak draw for the entire block...30a peak per circuit. The main positive in should be fused at 125 per the specs from BlueSea.

Does this block come with a positive and a negative bus? I don't want to have to daisy chain the positive lead to each lead on the panel...

Yes, it does indeed come with both a positive (fused) bus and a negative bus. Very nice unit, as with all Blue Sea products. I would and have bought again after purchasing mine.

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Blue Sea Systems ST Blade Fuse Block

Product ID: 249495008

Details

Connector type
Screw
Current rating
100 Amps
Material
Tinned Copper
Mounting type
screw mount
Number of contacts
12

⚡100A max block capacity for heavy-duty loads

🔋12 circuits for versatile power management

🔧#10-32 stud for secure positive bus connection

Bs.1578

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Description

⚡ Fuse your system with confidence — the pro’s choice for flawless power!

EFFORTLESS ACCESS MAXIMUM SAFETY - Push-button latch cover meets ABYC/USCG insulation standards and stores spare fuses
POWER YOUR PROJECTS WITH PRECISION - 12 individual circuits with integrated negative bus for clean, organized wiring
BUILT TO ENDURE DESIGNED TO IMPRESS - Marine-grade tinned copper construction resists vibration, heat, and moisture
HEAVY DUTY CAPACITY WITHOUT COMPROMISE - Supports up to 100 amps per block and 30 amps per circuit for demanding electrical setups
UNIVERSAL COMPATIBILITY FOR EVERY SETUP - Accepts both ATO and ATC fast-acting blade fuses for flexible fuse options

The Blue Sea Systems ST Blade Fuse Block 5026 is a premium 12-circuit fuse block featuring a robust 100-amp total capacity and marine-grade tinned copper construction. Designed for professional-grade installations in RVs, boats, trucks, and solar systems, it offers a secure positive bus with #10-32 stud, a negative bus, and a transparent, ABYC/USCG-compliant cover with push-button latch for easy fuse access and spare storage. Compatible with ATO and ATC blade fuses, it ensures reliable, organized, and safe power distribution for demanding 12V DC applications.

Specifications

ASIN	B001P6FTHC
Best Sellers Rank	#15,164 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #33 in Fuses & Holders
Brand Name	Blue Sea Systems
Color	With cover
Colour	With cover
Connector Type	Screw
Connector type	Screw
Current Rating	100 Amps
Current rating	100 Amps
Customer Reviews	4.8 out of 5 stars 6,589 Reviews
Global Trade Identification Number	00632085050269
Included Components	FUSE BLOCK ST BLADE 12 W/GRD/CVR
Item Dimensions W x H	8.4W x 16.4H centimeters
Item Type Name	FUSE BLOCK ST BLADE 12 W/GRD/CVR
Item Weight	0.1 Kilograms
Manufacturer	BLUE SEA
Material	Tinned Copper
Material Type	Tinned Copper
Model	5026
Mounting Type	screw mount
Mounting type	screw mount
Number Of Contacts	12
Number Of Poles	12
Number of Positions	12
Number of contacts	12
Part Number	5026-BSS
Specification Met	ISO 8846, SAE J1171
Temperature Range	5E+1 Degrees Celsius
UPC	632085050269
Unit Count	1 Count
Upper Temperature Rating	122 Degrees Fahrenheit
Voltage	12 Volts (DC)

Reviews

K**D

👍

22.12.2023

J**N

A Go-To Fuse Block – I've Installed Several and Will Keep Coming Back to This One

A Go-To Fuse Block – I've Installed Several and Will Keep Coming Back to This One The Blue Sea Systems 5026 ST Blade Fuse Block is a flat-out outstanding product that earns every bit of 5 stars, and having installed several versions of it across different projects I can say with complete confidence that it is the fuse block to use. The 12-circuit layout with integrated ground and cover is thoughtfully engineered and makes for a clean, professional installation every time. The 100-amp capacity handles demanding electrical loads without any concerns, and the individual circuit fusing keeps everything properly protected and organized. The build quality is exactly what you expect from Blue Sea Systems—solid, marine-grade construction that holds up to vibration, heat, and the demands of vehicle, RV, boat, and off-grid solar applications equally well. The transparent cover protects the fuse connections from moisture and debris while still allowing a quick visual inspection of all circuits without removing anything. Labeling circuits is straightforward, wiring is clean and accessible, and the overall installation experience is as professional and reliable as the end result looks. For anyone building out a 12V electrical system on an RV, boat, truck, or solar setup, this is the fuse block I recommend without hesitation every single time. If you want to do your electrical system right, start here. Highest possible recommendation.

13.04.2026

M**K

Parfait

Bonne construction, bien pensé et fonctionne très bien ! Utilisé pour mes appareils dans mon van, aucun problème après 2 mois d'utilisation 24h/24

1.11.2022

T**S

Excellent quality. Well designed and solid built

After having bought two of the cheaper ones on Amazon at 1/3 of the price of this, I finally decided to risk the £40 and see what it's like, intending to replace one of my existing fuse boxes. I am not disappointed. The quality of this unit shines through and I have immediately ordered another to replace the other cheap one.

14.06.2025

D**L

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Great experience from order to delivery. Highly recommended!

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Bs.1578

Duties & taxes included

In stock

Sold byAmazon BoliviaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Bolivia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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