Need some Surface Mount Help Please

[John Wood]

Hey folks.

I was wondering if one of you kind people can help me out with a surface mount part identification.

I need to order some replacement resistors for the R470 in the picture.

Can anyone help me identify specifically what type of surface mount resistor this is and, if possible, where I can order an exact replacement??

I've tried on my own and I can't seem to find any specs that list one this size.

Thanks for any help any of you can offer.

John

[Aaron, M]

That should be a 0.470 Ohm resistor, if you have some calipers you can figure out the size code as well.

https://dmohankumar.wordpress.com/2011/09/18/smd-resistors/

http://www.learnabout-electronics.org/Resistors/resistors_07.php

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[Walter Stokes]

That's probably a 1W 2512 470mOhm resistor. Mouser has them:
http://www.mouser.com/Search/m_ProductDetail.aspx?Yageo%2fRL2512FK-070R47L%2f&qs=sGAEpiMZZMvdGkrng054t8AJgcdMkx7xx2k1h33YwC4%3d

Also: Hi John!

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[John Wood]

Thank you very much for you help gentlemen. Ordering them right now!

Also: HI WALTER!

[Ben Eishen]

Visually it doesn't look bad though. Resistors are pretty hard to kill. I would sanity check with an ohm meter first :) My gut instincts is to check the suspect connector solder point, relay(looks like a relay pin layout) or anything that is connected to the high current path associated with that pin. The PCB designer was concerned with current and the traces heating up since the red solder resist is pulled back.

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Ben S. Eishen
773.234.7436 | b...@eishen.com

[John Wood]

Thanks Ben. 

That board works fine. The fried carcass of that same resistor on a duplicate board is the one that's getting replaced. (= 

It fell victim to a power surge from a faulty outlet at a 100 year old home. 

[Danny Chamberlin]

In that case, are you sure that's going to fix it? Usually if it gets to that point, a lot of stuff in between are toast too, even though they might not show it?

Danny

[MemphisArtGuy]

The resistor size code is the length .xx + height .xx , looks like a 1206. Next size down is 0805.  See image below. Your resistor is on it. =D

[Danny Chamberlin]

..and holy crap! Hi Walter! LTNS

Danny

On Tue, Sep 13, 2016 at 9:03 AM, Walter Stokes <wwst...@gmail.com> wrote:

[John Wood]

Thanks Danny. No I'm not sure that this is the main issue, but since it's the biggest scorch mark on the board I'm going to replace it first and see if it is the only issue. I ordered 10 so I should have plenty in case I need more (=

Thanks Dru. That's a great reference. I'll have to keep that in case I need other SMD resistors in the future.

[Ben Eishen]

Just make sure to clean up the board pretty good before plugging it back in. Burnt ass carbon is conductive :)

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Ben S. Eishen
773.234.7436 | b...@eishen.com

[John Wood]

I had not considered that. Good to know. Thanks!

[Keith]

Yes it appears to be a 2512 .47 Ohm resistor

Good luck with it.

 

Keith

 

From: midsout...@googlegroups.com [mailto:midsout...@googlegroups.com] On Behalf Of Danny Chamberlin
Sent: Tuesday, September 13, 2016 11:58 AM
To: midsout...@googlegroups.com
Subject: Re: [MidsouthMakers] Need some Surface Mount Help Please

 

..and holy crap! Hi Walter! LTNS

Danny

 

On Tue, Sep 13, 2016 at 9:03 AM, Walter Stokes <wwst...@gmail.com> wrote:

That's probably a 1W 2512 470mOhm resistor. Mouser has them:
http://www.mouser.com/Search/m_ProductDetail.aspx?Yageo%2fRL2512FK-070R47L%2f&qs=sGAEpiMZZMvdGkrng054t8AJgcdMkx7xx2k1h33YwC4%3d

Also: Hi John!

On Sep 12, 2016 10:56 PM, "John Wood" <jwo...@gmail.com> wrote:

Hey folks.

 

I was wondering if one of you kind people can help me out with a surface mount part identification.

 

I need to order some replacement resistors for the R470 in the picture.

 

 

Can anyone help me identify specifically what type of surface mount resistor this is and, if possible, where I can order an exact replacement??

 

I've tried on my own and I can't seem to find any specs that list one this size.

Thanks for any help any of you can offer.

 

John

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