I have 2 feed through capacitor NFM21PC475B1A3 & NFM21PC105B1C3. These haven't the same capacitance. I want to separate them but I can't measure. Help me what should I do?
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\$\begingroup\$ Search for the part numbers, it will tell you the values. \$\endgroup\$– awjloganCommented Aug 15, 2018 at 8:35
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\$\begingroup\$ @awjlogan oh! Some of them have been mixed accidentally. Their shapes are same. So I can't separate. \$\endgroup\$– parisa-farCommented Aug 15, 2018 at 9:20
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\$\begingroup\$ Is there nothing printed on the components? \$\endgroup\$– awjloganCommented Aug 15, 2018 at 10:11
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\$\begingroup\$ @awjlogan Nope! It looks like a ceramic capacitor but it has 4 lead. \$\endgroup\$– parisa-farCommented Aug 15, 2018 at 10:19
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\$\begingroup\$ Got it! Didn't mean to be glib, by the way :) \$\endgroup\$– awjloganCommented Aug 15, 2018 at 10:22
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1 Answer
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Buy some cheap $5 multimeter which can measure capacitance.
One capacitor is 4.7uF and the second 1uF. So even the cheapest multimeter with capacitance measurement capability will help to distinguish them.
answered Aug 15, 2018 at 7:25
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\$\begingroup\$ I have a multimeter. But it's not the same as capacitor. when I measure the two larger leads multimeter shows 0. \$\endgroup\$ Commented Aug 15, 2018 at 7:30
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\$\begingroup\$ @parisa-far make sure it has capacitance measurement on it, and make sure the leads are in the right place \$\endgroup\$– MCGCommented Aug 15, 2018 at 7:45
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\$\begingroup\$ @parisa-far those larger pads are shorted together, look at the datasheet. Measure capacitance between one of the outter pads an pad in the middle. \$\endgroup\$ Commented Aug 15, 2018 at 11:08