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30A Fuse

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Old Aug 23, 2023 | 11:55 AM
  #1  
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30A Fuse

Anyone figured out where to get these 30A Fuses in the F250 (under hood fuse box)?

Manual says they are FMM/MCase 30A, but can't find them anywhere, and not sure the description is what they actually are.

Asked local dealer, and they didn't seem to know either; said Ford system still shows wrong part number for what I'm looking for.


 
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Old Aug 23, 2023 | 12:32 PM
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I ordered some from Amazon earlier this year for my Mustang. I bet the truck uses the same ones.
 
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Old Aug 23, 2023 | 12:43 PM
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I had to buy it at a dealership last time I needed one.
 
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Old Aug 23, 2023 | 12:49 PM
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Can't find on Amazon.

Went to dealership this morning, they were unable to provide (or provide what the correct fuse/part number even was). They gave me a similar 30 amp split fuse, but clearly not the same one.
 
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Old Aug 23, 2023 | 01:18 PM
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Originally Posted by BigRed2000
Can't find on Amazon.

Went to dealership this morning, they were unable to provide (or provide what the correct fuse/part number even was). They gave me a similar 30 amp split fuse, but clearly not the same one.
Do they have to be split? I get lots of hits when I search for FMM/MCASE 30 amp

Amazon Amazon

Amazon Amazon
 
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Old Aug 23, 2023 | 02:43 PM
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Every auto parts store has them.
https://www.autozone.com/electrical-...use/547342_0_0

May look slightly different but fits same slot.
 
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Old Aug 23, 2023 | 03:38 PM
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Originally Posted by BigRed2000
Anyone figured out where to get these 30A Fuses in the F250 (under hood fuse box)?

Manual says they are FMM/MCase 30A, but can't find them anywhere, and not sure the description is what they actually are.

Asked local dealer, and they didn't seem to know either; said Ford system still shows wrong part number for what I'm looking for.
I had the same problem trying to find one of the 25A upfitter fuses. Manual says it's a low-profile JCase but none of the parts places had anything that was even close to what is in the truck. I bought some and tried them but it wasn't the correct shape. Never did find any replacements even after posting here. I wanted to get a lower amperage so I wouldn't have to add an in-line fuse but that plan didn't work.

 
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Old Aug 23, 2023 | 04:57 PM
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Try searching slotted mcase fuses. Took me forever to figure that out. I severed my travel trailer cord on my last camping trip and I blew one of these fuses. Got a replacement and it seems to work now.

Edited to link a 30amp fuse.

https://www.amazon.com/Littelfuse-0695030-PXPS-Slotted-MCASE-Cartridge/dp/B08HSMFGR5 https://www.amazon.com/Littelfuse-0695030-PXPS-Slotted-MCASE-Cartridge/dp/B08HSMFGR5


 
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Old Aug 23, 2023 | 11:45 PM
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I bought my spare fuse set from Mouser.com.


 
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Old Aug 24, 2023 | 09:29 AM
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Originally Posted by Fox-BLUE1
Try searching slotted mcase fuses. Took me forever to figure that out. I severed my travel trailer cord on my last camping trip and I blew one of these fuses. Got a replacement and it seems to work now.

Edited to link a 30amp fuse.

https://www.amazon.com/Littelfuse-0695030-PXPS-Slotted-MCASE-Cartridge/dp/B08HSMFGR5
No issues with this slotted Mcase working even though it's not the exact same?
 
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Old Aug 24, 2023 | 12:33 PM
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No issues. I haven’t towed yet, but after changing the fuse out my trailer lights work now.

I just went to the truck to pull a fuse and show the similarities between OEM and the replacement I got on Amazon.





I know they are different amp ratings, but the 30 and 40 were the only ones I could pull with my fingers. The pink and green are OEM from the factory. The white one is from the link I posted above. No fit issues.
 
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Old Feb 26, 2025 | 02:57 PM
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Amazon has them click here

I got this set as a spare for my truck and keep it in the glove box.
 
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Old Feb 27, 2025 | 12:21 PM
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May want to double check your link.... does not go to amazon.
 
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Old Feb 27, 2025 | 12:23 PM
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Link worked fine for me. I picked up a set to use as spares, to throw in the glovebox.
 
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Old Feb 27, 2025 | 12:29 PM
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Half the time FTE rewrites the links... "amzn.to/4gV2tX2". Copy and paste that, and delete the " marks.
 
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