Author Topic: Need help to identify the SMD component  (Read 137 times)

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Offline White Rabbit

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Need help to identify the SMD component
« on: December 03, 2019, 09:50:26 am »
Hello,
I have a question about SMD component, looks like diode, but not it.
I tested conponent with multimeter in diode check mode, with 1mA and 0.1 mA current (I have Fluke 8846A), voltage drop in both way is 0.22 V.
This component used in Siemens module for absolute encoder interface.
I have a 3 new not used modules, so component must be not brocken.
Marking is 103 in first row and 15m in second.
Look to the photo
 

Offline senso

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Re: Need help to identify the SMD component
« Reply #1 on: December 03, 2019, 10:35:23 am »
Tantalum capacitor?
 

Online Fraser

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Re: Need help to identify the SMD component
« Reply #2 on: December 03, 2019, 10:59:16 am »
0.01uf Tantalum capacitor.

Note that you have to be careful if replacing a tantalum capacitor. You need to select one with adequate voltage rating and design. Some are better able to cope with ripple voltages than others. Just look at manufacturers data sheets for all the information you need. KEMET is a very well known brand and provides data sheets on line

Fraser
 

Offline White Rabbit

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Re: Need help to identify the SMD component
« Reply #3 on: December 03, 2019, 11:54:31 am »
Thanks!
Why do you think so this is capacitor? 0,22V drop? Hmmm...
Which another component is it may be?

I will try to draw schematics, this smd in series with LED and resistors, and try to make best photo
 

Offline senso

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Re: Need help to identify the SMD component
« Reply #4 on: December 03, 2019, 12:50:13 pm »
Remove it from the board and measure it alone, and not in circuit, then you will know if its a cap, or a diode, or a zener.
 


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