Technical Specifications (according to manufacturer): 5 layers Composite dielectric, Super low DF.
Sound: First of all they need a much longer burn-in time than most capacitors, in the beginning they are rather aggressive. After burn-in I still find the top-end over-etched which gives it a slightly artificial treble. They are well detailed but I find the midrange a little under exposed, maybe they would work well in a dull sounding speaker. Spatiality is good, probably due to the highlighted top-end but only average separation. I find them similar in character to the Evox Rifa PHE-450. They also benefit a lot from a paper-in-oil bypass capacitor. For their low price they perform well.
Verdict: 7, 5
Source: Capacitor Tester
10pcs Arcotronics 1uF 250vdc 10% MKP Metallized Polypropylene Capacitor
Single Detail Page Misc (Arcotronics)
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Any replacement suitable for AC service that is2011-05-16 18:37:53 by JerseyScrounger
2 micro farads and has a voltage rating equal to the original or greater will be fine. It cannot be a polarized capacitor with a plus and minus.
Handy trick for testing AC motor start capacitors.
Connect you capacitor to 120/60 through an ac amp meter, and run the results through this formula. (connect it only long enough to get a reading)
MFD = Amps * 2650 / Volts
So for this 2MFD cap at 120/60, it should draw - 0.09 amps, if it's working properly.
When testing this kind of thing I use a test block that I put together that has a 2.5 amp circuit breaker to protect me and the meter, it is also GFI protected.
Start Capacitor Question2008-09-07 17:38:21 by bad_ducks
I've got a 3 hp Magnetek motor that is about 15 years old but under lite duty.
The motor won't start. It humms then blows the breaker. the motor is not froze up nor does it smell burned.
An AC friend checked the capacitors and he says one of the start capacitors is bad.
I can get a replacement from Grainger that is almost the same except the one I presently have is rated 165 volts 815 - 970 mfd and it has a 4700 ohm resistor across the terminals.
The Grainger replacement is about the same mfd but the voltage is rated at 115 and it doesn't have the resistor.
Should it work ok and should I put the resistors on the new capacitor.
The motor is used on an air compressor.
Single phase 220 volts.
Thanks for your help.
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Cooper Power Systems--with 70 years of capacitor development experience--offers metal-enclosed, pad-mounted capacitor banks that are smaller,.