Does this item come with the fuse terminal included? If so, how do I specify the amperage

I just ordered three of these - they each came with a 300A fuse. I was not expecting fuses to be included, so I had ordered them separately. If this is not a shipping/packaging mistake, it would be nice if the seller gave the option to choose a fuse size. While I can use a 300A on one of the terminals, I needed smaller ones for the others. I didn't buy them weeks ago because of the relatively high price of these fuses (typically ~$15 each). They were on sale for $10, so I got them now.

I have a new 100ah 12v lifepo battery. what fuse size do i need to go with this?

At solavanbuild, I use 150 amp fuses with 1/0 AWG battery cables in most of my installs.

I'm thinking of running a charge/power wire of the alternator to a trailer battery. Would it be OK to use this off the charge lead on the alternator?

I would recommend an automatic Charing Relay ACR. Blue sea makes great ones. I use their Mini-ACR because my boat alternator is less than 65A. Their standard handles up to 300A. Remember regardless, you will need TWO of these fuses, one at each battery. If your alternator puts out 60A then 75A fuses, if it puts out 100A than 130-150A fuses.

Can I use this as a bus bar (without a fuse), just to extend a 5/16 battery terminal. Thank you

No you can't.. The stud is insulated from the block.. And don't grind it down. As they are meant for fuses to complete the circuit. Just buy a battery post if you need that...

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⚡ Stay Powered, Stay Protected – Fuse Smart, Live Bold!

SEAMLESS COMPATIBILITY - Standard 5/16" or 3/8" ring terminal hardware for easy integration with your existing setup.
SPACE SAVVY ENGINEERING - Compact form factor fits tight spaces without compromising performance.
MARINE GRADE RELIABILITY - Insulated cockpit-grade plastic construction prevents accidental shorts and enhances safety.
POWER UP WITH CONFIDENCE - Handles a robust 30-300 AMP range for versatile high-current protection.
BUILT TO BRAVE THE ELEMENTS - Weather-resistant isolated stud design ensures durability in harsh marine and outdoor environments.

The Blue Sea 5191 Fuse Block Terminal offers a compact, weather-resistant solution for high-current protection ranging from 30 to 300 amps. Designed with an isolated stud and standard 5/16" hardware, it’s perfect for marine, RV, and water sports applications where space is limited but reliability is critical.

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Model Number	5191
Material	Plastic
Batteries Included	No
Target Audience	Adult, Boat Owners, PWC Owner, RV Owners, water sports
Product Dimensions	6.35 x 6.35 x 5.08 cm; 45.36 g

青い海 - システムズ5191ヒューズブロックターミナル30-300アンプ（32561）

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