Originally posted by SwissGambit
In 15 years in the field of electronics, I have never seen the reference designator "GA" until I opened up my TV. I have a failed switching power supply. One of the AC input fuses keeps blowing. This GA component has a clear body. Inside is a tightly wrapped coil (?) of wire with two bands of (apparently) solder around the ends. My guess is that it is so ...[text shortened]... fuse-like component that may have been blown along with the fuse.
Anyone know what this is?
Sounds like a slow blow fuse. A photo would confirm it. If a slow blow fuse went it means there is a problem with some other part of the circuit, something else shorted out taking out a fuse that is supposed to delay the process of blowing out so transients generated by just turning on the power supply won't keep blowing a fast blow fuse.
It's like an incandescent light bulb, there is an inrush current because the tungsten filament inside has a lower resistance cold than hot, so there is an inrush of several times the operating current but for only a short period of time, say a half second or so.
Using a fast blow fuse in that situation would just mean the fuse would blow every time the bulb is turned on.
Here is a wiki about fuses, see if the first photo is what you are talking about. Your description sounds like this is it.
I don't find the GA designation for fuses but I found GMA which is a normal fast blow fuse.
The only GA I know is 'gallium arsenide' which is a high power high temperature and fast transistor series or computer chips made with gallium arsenide. That doesn't sound like a semiconductor of any kind to me from your description. It might be a thermal protection fuse.
Is that the one that is blowing? Usually thermal protectors are attached to the object they are protecting against high temperature, if the temp goes past the set point the device opens up stopping the current causing the over temp, sometimes they recover on their own, sometimes a one shot deal.
Sorry if I am covering stuff you already knew. I guess you are an electronics tech? You work on computers?
I found this little glossary of electronic designators:
In the G section there was no GA, only G.
Which doesn't mean it doesn't exist, only that it might be a company name instead of an electronic designator.