If code is 3R9 then R is an indicator of values Less than 10pF and has nothing to do with resistance. Some small capacitance capacitors can be marked with an R between numbers. Some capacitors are only marked as 0.1 or 0.01, mostly in these cases the values are given in uF. 2A is a 100VDC rating according to the EIA (Electronic Industries Alliance) standard.Ī second letter will be a temperature coefficient if it’s present. 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. 15 nF = 15 × 1000 pF = 15000 pF Codes of Polyester Film and Metallized Film Capacitor likely to contain PCBs: Appendix IV is a list of electrical. Digit 10 to 11 Mechanical version and/or packaging (table 1).
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