SIGforum
Fuse designation T500mAE250V

This topic can be found at:
https://sigforum.com/eve/forums/a/tpc/f/320601935/m/5550080654

April 26, 2019, 07:50 PM
mark123
Fuse designation T500mAE250V
I blew the HT fuse on my amp.

T = time delayed

500mA = current rating

E <- what does this letter mean?

250V = voltage rating

I can order some T500mAL250V from Amazon but there's no listing for T500mAE250V
April 26, 2019, 09:38 PM
shovelhead
https://www.tubesandmore.com/p...filters=Type%3DFuses Try these guys?


-------------------------------------——————
————————--Ignorance is a powerful tool if applied at the right time, even, usually, surpassing knowledge(E.J.Potter, A.K.A. The Michigan Madman)
April 26, 2019, 09:41 PM
Wayniac
Typically the letter directly preceding the rated voltage indicates the “Breaking Capacity” of the fuse. This is normally represented by the the letter “L” for low or “H” for high. That’s all I’ve got.
April 26, 2019, 11:07 PM
sig operator
This is a standard 5 X 20 mm glass tube fuse correct? None of my references show an E in a part number. Nor can I find any reference table of specifications associated with the letter E.
So guess time, These are available with wire leads, some have called them E-leads. Maybe some manufacturer used that in its part number. Has some one cut the wire leads off to use it in a standard fuse holder?
April 27, 2019, 08:31 AM
Patrick-SP2022
quote:
T500mAE250V

I came across this document.
https://www.littelfuse.com/tec...ap-marking_guide.pdf

Breaking Capacity:
L = Low (glass)
H = High (ceramic)
E = Enhanced (glass)

Looking further, I came across this.

For IEC fuse types, a symbol denoting the rated breaking capacity is indicated directly on the
component: L standing for 35 A or 10 x IN maximum, E for 150 A and H for 1 500 A

https://eska-fuses.de/fileadmi...tory-Information.pdf

Hope this helps.




April 27, 2019, 09:38 AM
striker1
I suspected "enhanced" as well.

mark123, I think the non-"E" version will be fine.



RB

Cancer fighter (Non-Hodgkins Lymphoma) since 2009, now fighting Diffuse Large B-Cell Lymphoma.


April 27, 2019, 10:33 AM
sig operator
After Patrick-SP2022 found out what the E means.
The fuse you referenced only had a breaking capacity of 35 A. The one you are replacing has a breaking capacity of 150 A, same as a Littlefuse 0219.500 MXAP available from Newark, Digi-key, or Arrow. May be Amazon, did not check.
April 27, 2019, 08:04 PM
mark123
quote:
Originally posted by shovelhead:
https://www.tubesandmore.com/p...filters=Type%3DFuses Try these guys?
Thanks. It's this one (5mm x 20mm): https://www.tubesandmore.com/p...e-slo-blo-5mm-x-20mm
April 27, 2019, 08:08 PM
mark123
quote:
Originally posted by Wayniac:
Typically the letter directly preceding the rated voltage indicates the “Breaking Capacity” of the fuse. This is normally represented by the the letter “L” for low or “H” for high. That’s all I’ve got.
quote:
Originally posted by sig operator:
This is a standard 5 X 20 mm glass tube fuse correct? None of my references show an E in a part number. Nor can I find any reference table of specifications associated with the letter E.
So guess time, These are available with wire leads, some have called them E-leads. Maybe some manufacturer used that in its part number. Has some one cut the wire leads off to use it in a standard fuse holder?
Yeah, that's where I was getting stuck, too.
quote:
Originally posted by Patrick-SP2022:
quote:
T500mAE250V

I came across this document.
https://www.littelfuse.com/tec...ap-marking_guide.pdf

Breaking Capacity:
L = Low (glass)
H = High (ceramic)
E = Enhanced (glass)

Looking further, I came across this.

For IEC fuse types, a symbol denoting the rated breaking capacity is indicated directly on the
component: L standing for 35 A or 10 x IN maximum, E for 150 A and H for 1 500 A

https://eska-fuses.de/fileadmi...tory-Information.pdf

Hope this helps.
It does, thanks!
quote:
Originally posted by striker1:
I suspected "enhanced" as well.

mark123, I think the non-"E" version will be fine.
quote:
Originally posted by sig operator:
After Patrick-SP2022 found out what the E means.
The fuse you referenced only had a breaking capacity of 35 A. The one you are replacing has a breaking capacity of 150 A, same as a Littlefuse 0219.500 MXAP available from Newark, Digi-key, or Arrow. May be Amazon, did not check.
Thanks, I'll check it out.
April 27, 2019, 08:53 PM
shovelhead
Also check out Mouser.


-------------------------------------——————
————————--Ignorance is a powerful tool if applied at the right time, even, usually, surpassing knowledge(E.J.Potter, A.K.A. The Michigan Madman)