SIGforum
Fuse designation T500mAE250V
April 26, 2019, 07:50 PM
mark123Fuse 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
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————————--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
WayniacTypically 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 operatorThis 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-SP2022quote:
T500mAE250V
I came across this document.
https://www.littelfuse.com/tec...ap-marking_guide.pdfBreaking 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.pdfHope this helps.
April 27, 2019, 09:38 AM
striker1I 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 operatorAfter 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
mark123quote:
Thanks. It's this one (5mm x 20mm):
https://www.tubesandmore.com/p...e-slo-blo-5mm-x-20mmApril 27, 2019, 08:08 PM
mark123quote:
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.pdfBreaking 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.pdfHope 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
shovelheadAlso 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)