The component you removed is a transistor you need to put back the transistor you buy one from radioshak with the same number and put it back
please give the no of pins it have and the correct no on the component
this is not a transistor its FET (Feild Efficent Transistor)
to confirm i need to see the circuit or trace the circuit if it comes in line with the power line it is for sure if it comes in between the circuits need to check it again
its better to use the component than not using it it protects the board and other components from electrical surge if a voltage beyond the limit come the transistor fails and protect the other electronic components you can use an equivalent same as the data sheet of the component which you used the voltage rating and the current rating is the main thing to look out for also the heat dissipation of the component
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That's not very helpful. Can you be more specific?
What I need is either the spec of the transistor, or an easily found equivalent. If I could have found the information ('what is a 4DLM') on the web I wouldn't have need to ask the question!
I guess it's there to force the resettable fuse to 'blow' when idiots like me put wrong voltage/polarity in, but it had fried its insides and become a pemanent short circuit.
I had assumed it was a voltage regulator (because that's what it looks like). I removed it so that I could apply power to the board externally and was surprised when the lights came on!
Removing it has made the router work again, but presumably without protection.
btw, no Radioshack here (UK) but we do have other suppliers. (Maplin, RS Components etc.).
Thanks.
The package is a 5mm square surface mount with a heatsink on the back soldered to the board. there are two legs soldered to the board (and a central leg which maybe cut off - seems to be connected to the heatsink). The markings are in 3 lines.
1: 348, then 'ON' inside a circle, 2: AC, 3: 4DLM. I have seen a picture of similar router with 410/AC/4DLM on the case (which of course I cannot find now!)
I believe the package is TO-252 style.
This is the inside of the routerhttp://files.wl500g.info/asus/wl500g/img...
The dud transistor/regulator is at top right, below the power input and a resettable fuse (white), above a capacitor.
After many days searching I now believe it is actually one of these http://www.onsemi.com/pub_link/Collatera...
A bi-directional Thyristor. (not a Transistor, nor a Field Effect Transistor).
What do you think?
I don't think this is going anywhere useful. I know more about it than I did before, but not from your helpful hints I'm afraid and the answer is that to replace it I need a Triac which is unavailable, so I'll just have to go for an approximate equivalent . Or I could just carry on with it unprotected but working and try not to feed the wrong power to it in future.
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