amp to battery fuse
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=131312
Printed Date: July 13, 2025 at 2:39 AM
Topic: amp to battery fuse
Posted By: boson
Subject: amp to battery fuse
Date Posted: April 29, 2012 at 9:28 PM
I'm planning on buying an amp with 3x 30A fuses in the back. The amp kit that I'm buying (KnuConcepts from Amazon) has an 80A AGU fuse.
Will it be safe (as in will it damage my equipment for using that 80A) or should I upgrade to a 100A AGU? Should I have a larger fuse or a smaller fuse? AGU vs ANL fuses?
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'97 Lexus ES300
(Expertise Level: Recently gotten into working with cars)
Replies:
Posted By: oldspark
Date Posted: April 29, 2012 at 10:28 PM
The fuse should be sized based on the cable it is protecting.
Smaller depends on whether less power is envisaged, or you'd rather replace one fuse than 3.
Posted By: tommy...
Date Posted: April 30, 2012 at 10:47 AM
Move out of the AGU fuse and go with an ANL... AGU fuses are only good to about 60 amps, after that it melts the solder(Oldspark... Can you give a bit more specifics on this, please?). An ANL will be better in the long run... Too many connection points that really cant be "tightened" on the AGU style fuses... Plus, with these poor connection, over time all you are left with is a newly shaped AGU fuse holder ( Because it melted)...
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M.E.C.P & First-Class
Go slow and drink lots of water...Procrastinators' Unite...Tomorrow!
Posted By: tommy...
Date Posted: April 30, 2012 at 10:49 AM
oldspark wrote:
The fuse should be sized based on the cable it is protecting.
.
------------- M.E.C.P & First-Class
Go slow and drink lots of water...Procrastinators' Unite...Tomorrow!
Posted By: oldspark
Date Posted: April 30, 2012 at 12:29 PM
AGU are glass type which means a center fusewire bonded to the end caps. These can vibrate or fatigue loose etc.
Blade types like ANU & ATS etc may be one-piece else be more robust (better bonding with less expansion & vibration) and hence more reliable.
Glass types also tend to mounted using compression over a wide area, hence more susceptible to corrosion (hence heat, hence tempering and loss of compression or springiness).
Blades have a lower contact area with greater pressure, and tend not to use spring metal.
Glass fuses have had their day. Blade fuses are in.
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