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What fuse is this

Flyback

Well-Known Member
Hi
Glass cartridge fuse marked "BUSS BS2950A 10A"

its 32mm by approx 5mm cylinder

..do you know if its fast or slow?

web wont say
eg
these may or may not be it..

 

Flyback

Well-Known Member
Thanks, Roff, this is indeed what it looks like

It goes in the secondary of a 350w mains transformer psu.......vac input is 240v, and vout is 84.5vdc after it has been rec'd and smoothed by about 9mF of capacitance.....then comes the linear regulator.

Need to know if it is a TDC10 or TDC11 to identify characteristics
Thanks, it didnt say either on it...just the text in the top post
 

unclejed613

Well-Known Member
Most Helpful Member
since it's feeding through a rectifier into a capacitor, it will most likely be a slow-blow since it has to deal with a surge of charging current into the capacitors.
 

Nigel Goodwin

Super Moderator
Most Helpful Member
Thanks, Roff, this is indeed what it looks like

It goes in the secondary of a 350w mains transformer psu.......vac input is 240v, and vout is 84.5vdc after it has been rec'd and smoothed by about 9mF of capacitance.....then comes the linear regulator.


Thanks, it didnt say either on it...just the text in the top post

Anti-surge/slow blow then, due to the surge - I presume you mean 9000uF?, no one uses mF :D
 

rherber1

New Member
Thanks, Roff, this is indeed what it looks like

It goes in the secondary of a 350w mains transformer psu.......vac input is 240v, and vout is 84.5vdc after it has been rec'd and smoothed by about 9mF of capacitance.....then comes the linear regulator.


Thanks, it didnt say either on it...just the text in the top post
BS2950A includes both fast and delayed action fuses - as pointed out by rfranzk.
TDC10 is fast acting and TDC11 is delayed acting.

The link posted by Roff showed only the fast acting type. You seemed to agree that the fuse in this link is the same as the fuse you are asking about. If you are sure it is the same fuse then it is the fast acting TDC-10-10-R. The delayed acting fuse TC-11-10-R will have a helical spring visible throught the glass.

datasheet here https://www.eaton.com/content/dam/e...11-time-delay-glass-tube-fuses-data-sheet.pdf
 

Flyback

Well-Known Member
The delayed acting fuse TC-11-10-R will have a helical spring visible throught the glass.
Thanks, unfortunately, the fuse has blown and all i can see is just dead bits of fuse wire.
 

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