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Calculating some capacitor codes. The most common capacitor code uses a first digit, second digit, and multiplier scheme: Example: 223J 151K . = = . 22 x 103 pF = 22 nF . 15 x 101 pF = .15 nF = .022 μF 5% Tolerance = .00015 μF 10% Tolerance. Occasionally capacitors will have the value listed very plainly: . Example: 47 pF 4p7 .
Capacitors are labeled in a wide variety of different ways, but this handout lists the most common markings on capacitors and what they mean. Electrolytic and Tantalum capacitors often have the capacitance (in uF) and voltage (maximum allowed voltage) printed on them in human-readable form.
3 Οκτ 2024 · 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.
Code pF nF µF Code pF nF µF Code pF nF µF 100 10 0.01 0.00001 220 22 0.022 0.000022 470 47 0.047 0.000047 101 100 0.1 0.0001 221 220 0.22 0.00022 471 470 0.47 0.00047 102 1000 1 0.001 222 2200 2.2 0.0022 472 4700 4.7 0.0047 103 10000 10 0.01 223 22000 22 0.022 473 47000 47 0.047 104 100000 100 0.1 224 220000 220 0.22 474 470000 470 0.47
This brief table gives the basic rules for reading and translating the capacitance value-number-codes found on many small capacitors where the printable surface area demands readable abbreviations. The letter-codes are designating the tolerance on the coded value.
How to read Capacitor Codes . Large capacitor have the value printed plainly on them, such as 10.uF (Ten Micro Farads) but smaller disk types along with plastic film types often have just 2 or three numbers on them? First, most will have three numbers, but sometimes there are just two numbers. These are read as Pico-Farads.
When working with electronics, one of the more daunting and tedious – yet necessary – tasks is figuring out how to decipher capacitor codes. There are many different types of capacitors, but typically most do not have color coding like resistors.
