Can I use a higher voltage start capacitor?
Replacing a capacitor with something that has a higher voltage rating is always safe. The only problem there is that a capacitor rated for a higher voltage is often physically larger, everything else being equal. Make sure they actually fit in the same space.
Does start capacitor voltage matter?
Yes, a capacitor with a higher voltage rating will work fine. The voltage rating is just an upper limit for the capacitor, beyond which it may fail. You can use one of the same capacitance but a higher voltage.
How do you size a motor start capacitor?
“Multiply 0.5 times the square of the voltage. Call this result “x.”. Continuing the example, you have 0.5 times 11.5 volts times 11.5 volts, or 66.1 square volts for “x”. Divide the start-up energy requirement, in joules, of the motor by “x” to arrive at the capacitor size needed in farads.”
What voltage should a capacitor start at?
Most start capacitor applications use a rating of 50-1200 uf capacitance and voltages of 110/125, 165, 220/250 and 330 VAC.
Can you use a 16v capacitor instead of 10V?
The 16 V capacitor will continue to behave like a capacitor. Above 16 V, neither capacitor can be trusted. Show activity on this post. Assuming (from the high capacitance) you are talking about polarized caps, then yes, both will behave pretty much the same below 10V.
Is it OK to use a higher MFD capacitor?
You should always replace the capacitor with the value specified by the manufacturer. If this is the start capacitor, then an increase of 10 mfd (14% higher) may be acceptable. But if this is the run capacitor then it could cause an increase in current flow and cause the compressor to overheat.
What is the Microfarad range for run capacitors and for start capacitors?
1) Run capacitors are rated in a range of 3–70 microfarad (uF). Run capacitors are also rated by voltage classification. The voltage classifications are 370V and 440V. Capacitors with ratings above 70 microfarad (uF) are starting capacitors.
Can I use a 370v capacitor instead of an 440v?
Many techs think they must replace a 370v capacitor with a 370v capacitor. The voltage rating displays the “not to exceed” rating, which means you can replace a 370v with a 440v but you cannot replace a 440v with a 370v.
Can I use lower uF capacitor?
The rule of thumb is to select capacitors with voltage ratings higher than those expected in the circuit as a buffer. So, if you decide to replace a capacitor with a lower uf one, make sure that the new capacitor has the same voltage rating of the one you are replacing or is larger.