View Full Version : Fuse for Powered Speaker - Type?
Megamix
05-11-2010, 01:25 PM
I've got T1 1.6AL 250V fuses in my new db Opera 405d speakers - as spares theres seems to be:
Anti Surge or Slow Blow - I assume I need Anti Surge - is that correct?
TIA
deltic
05-11-2010, 01:58 PM
i would have thought you need slow blow
Almost any device with a large mains transformer need slow fuses to cope with startup currents, which can be fairly high. Also, charging the electrolytics in the power supply takes a lot of initial power.
abracadabradisco
05-11-2010, 03:16 PM
Anti surge are slow blow, check this item, there are 10 fuses,
cgi.ebay.co.uk/1-6A...6A...Slow-Blow-Anti-Surge...-/350106445079
Megamix
05-11-2010, 03:29 PM
Anti surge are slow blow
Doh! :muppet:
Thanks, I've ordered those
deltic
05-11-2010, 04:15 PM
Anti surge are slow blow, check this item, there are 10 fuses,
cgi.ebay.co.uk/1-6A...6A...Slow-Blow-Anti-Surge...-/350106445079
they are often related to as being the same thing but are not,the T on the original fuse indicates time delay or slow blow
slow blow = time delay
anti surge = fast acting
normal = quick acting
FF = Fast Fast. Very Quick Acting. (also known as Anti Surge)
F = Fast. Quick Acting. (also known as Anti Surge)
(Typically open in less than 20 ms @ ten times the rated current)
M = Medium. "Normal" or Very Short Delay.
(Typically open between 50 and 90 ms @ ten times the rated current)
T = Time. Time Delay or Slow Blow.
(Typically open between 100 and 300 ms @ ten times the rated current)
TT = Time Time. Long Time Delay or Very Slow Blow.
9709
abracadabradisco
05-11-2010, 05:43 PM
Hiya Deltic, thanks for the info, I will remember that.
That's what websites are for, helping each other.
Megamix
05-11-2010, 08:52 PM
:bang: Cripes now I don't know what they are that I've bought but thee is a T on my original fuse on the speaker - so slow blow it is (even though that sounds a bit ooh errr)
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