Need help identifying a part.

[Ronaldandijk]

Hello,i had a problem and blew up L3 does anybody know the value?

https://imgur.com/a/aChSCSe

[JoergS5]

deleted, Tony's information is much better.

[T3P3Tony]

@Ronaldandijk how new is your Duet?

On v1.04 L3 is A220R ferrite bead 0805 package
MPZ2012S221AT000

On earlier versions it's a 1210 1uH inductor
BRL3225T1R0M

[Ronaldandijk]

@t3p3tony Its version 1.2 ,Thanks for the help.Now i also know where to place a fuse.

[T3P3Tony]

@ronaldandijk inf you have a 1.02 then its the same as 1.03. Are you overloading the 5V system or did you get a short? The 5V BUCK regulator has thermal shut down so if the current gets too high then it should shut down so its interesting that the ferrite bead on the output side blew before the thermal shut down kicked in.

[Ronaldandijk]

@t3p3tony I was not paying attention to the polarity of the bltouch and i shorted out the ferrite bead.
i know .......that was stupid.Hooked up the usb to check if else is working cpu is working i can still connect to the duet trough wifi .I Found the part but the amp value is 2.4 a but i think that should not be a problem .

[T3P3Tony]

@ronaldandijk Ahh I see, thanks for the additional information - useful datapoint about shorts on the %V system.

[Ronaldandijk]

@t3p3tony
And L3 is replaced with a BRL3225T1R0M from TAIYO YUDEN.

[ebaday]

@t3p3tony
Is it possible to put MPZ2012S221AT000 instead of BRL3225T1R0M on the board at 1.02? There is a suspicion that the inductance does not work, but the BRL3225T1R0M is not available in stores. Analogues in the same building could not find

Thanks in advance!

[dc42]

Yes, that should work.

[ebaday]

@dc42 Thanks!