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  #1  
Old 06-11-2015
-The_Mask-'s Avatar
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Default Identifying smd part

Hi girls and boys,

I have a small defective control box here from a DC motor. I identified the problem, but I don't know what it is.

It says β044 BP, the first letter looks like beta and not like a B.


The right one is defective and the left one is still OK. The right defective one measures zero ohm resistance and the left one infinity, both ways.


The one that works is from the green circle and the defective one from the red circle.

Thx in advance.
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  #2  
Old 06-11-2015
rafal_iB_PL rafal_iB_PL is offline
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Looks like a diac to me:

http://www.bristolwatch.com/ele/diac.htm
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  #3  
Old 06-11-2015
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Could be yeah, thx.

If someone knows what the text means, then can I find the right replacement.
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Old 06-14-2015
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I used the one on the left next to the 4 pins socket. That one wasn't used, the whole 4 pins socket wasn't used, it's optional. Works like a charm now.
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Old 06-24-2015
Behemot Behemot is offline
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May also be transil.
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Old 01-31-2017
Apaics Apaics is offline
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I would need to xray this to see the die and then might not be sure.
who made the board?
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