What's the difference between SFE and AGC fuses? - Chevelle Tech
Electrical & Wiring Troubleshooting electrical problems.

LinkBack Thread Tools Search this Thread Display Modes
post #1 of 2 (permalink) Old Jun 22nd, 07, 2:26 PM Thread Starter
Tech Team
Join Date: Aug 1998
Location: SAN DIEGO, CA
Posts: 366
What's the difference between SFE and AGC fuses?

I was just at Carquest(formerly WorldWide) to buy some 20 amp fuses. They had 2 packages, one said SFE 20 and the other AGC 20. The fuse length looked idential, the filament inside the fuse looked to be exactly the same. The overall appearance was the same. There was about 20 cents difference in price. The parts counter man didn't know the difference. So what's the difference? If they are the same, it would seem dumb to me to have two different packaging containers.
Paul Lower SoCal is offline  
Sponsored Links
post #2 of 2 (permalink) Old Jun 22nd, 07, 2:31 PM
Senior Tech Team
Join Date: Jan 2001
Location: Fairfield, CA
Posts: 4,648
Re: What's the difference between SFE and AGC fuses?

SFE fuses are 'automotive', rated only to interrupt 32 volts. The length depends on their current rating, ranging from 5/8" for a SFE-4, to 1-7/16" for a SFE-30. AGC fuses are 'general purpose', they are always 1/4" by 1-1/4", available in 250V ratings to 10 amps, & 32V ratings to 30 amps. An AGC-20 is the same length, & pretty much interchanges with an SFE-20. Both types are "fast acting", but according to my Buss charts, the SFE is a little faster. An AGC-20 is rated to carry 27 amps for up to 60 minutes, while an SFE-20 will blow in under 2 minutes. However, the 60 minutes is given as a maximum, while the 2 minutes is apparently typical, so that may not be an accurate comparison.

SFE Glass fuses are designed to specifications set by the Society of Fuse Engineers. All are 1/4 inch in diameter, but vary in length according to the ampere rating to ensure accurate fuse replacement. Both AG and SFE fuses were designed into North American vehicles prior to 1981. Glass fuses are also used for auto accessory applications.

AGC = Automotive Glass Cartridge

onovakind67 is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Chevelle Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address. Note, you will be sent a confirmation request to this address.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Old Thread Warning
This Thread is more than 3657 days old. It is very likely that it does not need any further discussion and thus bumping it serves no purpose.
If you still feel it is necessary to make a new reply, you can still do so though.

Thread Tools Search this Thread
Show Printable Version Show Printable Version
Email this Page Email this Page
Search this Thread:

Advanced Search
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome