Need help identifying Capacitor for fan


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Old 05-19-18, 09:15 AM
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Need help identifying Capacitor for fan

I have a fan capacitor in my furnace that I suspect is on it's way out, but I'm having a hard time matching spec's online...

1200-010
RIC
5uF+10%-10%
370V-50/60Hz
-40*C/+7-*C
Type NSIPC

It seems that "Type NSIPC" is meaningless. I find lots of 370V caps online, but the other specs, like the "MFD", seem to be missing from my unit... ie: mine says "5uF+10%-10%", but all I'm finding only say "60/5", "55/5", "35 MFD" or "MFD +/-5%", etc... I can't seem to make any sense of these inconsistencies, and I have yet to find one that says "5uF +/-10%".

Can someone point me in the right direction?
 
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Old 05-19-18, 09:30 AM
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The important thing is that the capacitor is 5mfd and the voltage rating is 370VAC or higher. A quick search on Amazon gives the following:

https://www.amazon.com/Motor-Run-Cap.../dp/B06Y396F5S
 
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Old 05-19-18, 10:17 AM
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Thanks, lol, I've been searching all morning, and searches always result in XX/5, never "5" alone... with that said, I was always under the impression that millifarad (mfd) is larger than microfarad (uF)? ie: 1mfd = 1000 uF? It seems that maybe in the case of HVAC caps, they are somehow interchangeable?
 
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Old 05-19-18, 10:21 AM
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mfd is used for micro farad just as uF is. The u is supposed to be the micro symbol.

You need a 5 micro farad capacitor.
 
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Old 05-19-18, 12:54 PM
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I often check capacitors that are near 1000 microfarad and my meter jumps scale from uF to mF and the decimal point moves 3 places.

When I measure an 898 MFD capacitor my meter displays .898 mF.
 
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Old 05-19-18, 02:17 PM
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The important thing is that the capacitor is 5mfd and the voltage rating is 370VAC or higher. A quick search on Amazon gives the following:

https://www.amazon.com/Motor-Run-Cap.../dp/B06Y396F5S
How did you get a result with only "5mfd" or "5uF"? I did another search for the same spec hoping to find a 1.5" +/- round version (would like to avoid having to make a new bracket), but results always show 35/5, 40/5, 50/5 60/5 or 35+5, etc... and what do the 35/40/50/60 prefixes mean?
 
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Old 05-19-18, 02:22 PM
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Most condensers use a dual cap for the compressor and fan as apposed to two separate caps. There isn’t much room in many control boxes.

That larger first value is for the compressor.


https://www.grainger.com/product/30D...180519202536:s
 
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Old 05-19-18, 02:46 PM
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Originally Posted by gotdurt View Post
How did you get a result with only "5mfd" or "5uF"? I did another search for the same spec hoping to find a 1.5" +/- round version (would like to avoid having to make a new bracket), but results always show 35/5, 40/5, 50/5 60/5 or 35+5, etc... and what do the 35/40/50/60 prefixes mean?
I went to Amazon.com and searched for "5mfd/370v". The capacitor was the second one shown.
 
 

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