Typically the markings on a capacitor may give the figures like 22 and 6v.
Ceramic disc capacitor 104 voltage rating.
This is a simple online calculator for color band resistor marking inductor color band marking ceramic or tantalum capacitor 3 digit marking and smd resistor 3 digit 4 digit 10 5 2 and eia 96 e96 1 tolerance code marking.
When comparing disk capacitors of the same type and manufacturer it s the thickness that gives you an idea of how much voltage they can withstand.
Check the voltage rating.
For those that have it the voltage is marked directly such as 35 or 35v sometimes the letters wv are used after the voltage rating.
I intend to use the capacitor in a rf receiver circuit 20mhz where the maximum voltage is 12 v.
1 kv 1 000 volts.
Ceramic capacitors are generally smaller than types like electrolytic capacitors and therefore the markings need to be more concise.
Ceramic disc capacitors come in many versions.
Say a ceramic capacitor with the code 103 0 01 micro farad.
2a is a 100vdc rating according to the eia electronic industries alliance standard.
Multi layer ceramic capacitor mlcc mlccs are manufactured by accurately mixing finely ground granules of paraelectric and ferroelectric materials and alternatively layering the mix with metal contacts.
One hundred nanofarads capacitance.
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.
For basic general applications the brown ones are usually utilised for decoupling in low voltage circuits.
Ceramic disc capacitors have a capacitance value of 10pf to 100μf with a wide variety of voltage ratings between 16 volts to 15 kv and more.
For switched mode power supply applications epoxy coated flame retardant capacitors are usually used.
These meet the ul 94 v0 standard.
How to identify its voltage rating.
If a capacitor is marked with 2a474j the capacitance is decoded as described above the two first signs is the voltage rating and can be decoded from the table given below here.
This indicates a 22µf capacitor with a maximum voltage of 6v.
This indicates the working voltage really the maximum dielectric breakdown voltage of the capacitor.
A variety of schemes may be used.
This is the maximum voltage the capacitor is designed to handle.
Codes of polyester film and metallized film capacitor.
If you break one open and look at the actual ceramic not including the outer coating if it is about the thickness of a credit card or less you re talking perhaps 50 or 100 volts.
