How do you read a large capacitor?

To read a large capacitor, first find the capacitance value, which will be a number or a number range most commonly followed by µF, M, or FD. Then look for a tolerance value, typically listed as a percentage. Next, check the voltage rating, which is usually listed as a number followed by the letters V, VDC, VDCW, or WV.

What is a typical capacitor marking?

Let’s examine some typical capacitor markings. The image above is of an electrolytic capacitor marked with “100μF,” meaning it has a capacitance of 100 microfarads (the μ prefix indicates 10 −6). Expressed differently, this is 0.0001 farads.

How do you know if a capacitor is good?

Check the voltage rating. If there is room on the body of the capacitor, the manufacturer usually lists voltage as a number followed by a V, VDC, VDCW, or WV (for "Working Voltage"). This is the maximum voltage the capacitor is designed to handle. 1 kV = 1,000 volts.

How do you read a film capacitor?

How to Read Film Capacitor Values Film capacitors have their capacitance value directly printed on them in picofarads (pF), nanofarads (nF), or microfarads (μF). For example, “473” means 47,000 pF or 47 nF, and “0.1μ” means 0.1 μF.

How do you know if a capacitor is polarized?

Then look for a tolerance value, typically listed as a percentage. Next, check the voltage rating, which is usually listed as a number followed by the letters V, VDC, VDCW, or WV. Finally, see if your capacitor is polarized by looking for plus or minus signs next to its terminals, which indicate that it is.

How do you read a capacitor PF MMF & uuf?

1 pF, mmF, or uuF = 1 picofarad = 1 micromicrofarad = 10 -12 farads. Read the capacitance value. Most large capacitors have a capacitance value written on the side. Slight variations are common, so look for the value that most closely matches the units above. You may need to adjust for the following: Ignore capital letters in the units.