Hi,
Wondering if anyone can help me ID a part.
I have a diode that blew due to the wrong fuse that was placed before it . (2 amp ..instead of 1.6a ) and I am trying to replace the diode but the the markings are very faint . all I can make out is a 2 and 0. Does that makes sense ? Am I looking for a 2 amp diode replacement. I have no circuit diagram. The unit is a mains to 12v converter from Halfords UK ....it's for for a cooler box. A switching power supply model . RL-816U.
output is 13.6 v 5A 68 w . see pic D3 . Thank you

 

hi R,
Those 4 diodes form a full wave bridge rectifier circuit.
If you can read any of the diode markings, they are all the same type.

E

 

OK . will try clean up the others .but does 2 amp sound about right to you ? thank you Eric .

 

hi R,
You can get diodes rated at 5A, but check the wire size of the diode to ensure it will pass thru the PCB hole.
I suspect that there is another problem that has caused the diode to blow, a 2A fuse instead of a 1.6A should not cause that problem.

Do the large electrolytic capacitors look in good condition, no swelling, leakage or damage.?
E

 

Hi Eric ,

Yes the Caps look good . what happened was a bit of moisture got in from the rain . no pools though. the 16 amp fuse blew which I replaced with a 2amp . it was fine for a week and then I heard a 'snap!' sound and saw the black burn mark on the diode.

 

hi R,
You could try fitting a new diode and 1.6A fuse, but my best guess it will blow again.

E
I will post a link.

Try this supplier
https://www.bitsbox.co.uk/index.php?main_page=product_info&cPath=140_141_145&products_id=939

https://www.bitsbox.co.uk/index.php...id=&manufacturers_id=&pfrom=&pto=&dfrom=&dto=

 

Will give it a go . Thank you for the links Eric and thank you for your help . really appreciate it. Cheers . Paul

 

Just a note to you Eric . I replaced the diode but the fuse just blew again ...like you said . so I will be ordering a new unit .

Thanks again.