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MLCC & SMD Capacitance Code Converter
This calculator converts MLCC and SMD capacitor markings into capacitance values and converts capacitance values back into standard EIA codes. It supports 3-digit codes, 4-digit codes, R decimal notation, common tolerance suffixes, and capacitor values in pF, nF, and µF.
Code → Capacitance
Capacitance → Code
How MLCC Capacitance Codes Work
3-Digit EIA Code:
Code XYZ = XY × 10Z pF
Example: 104 = 10 × 104 pF = 100,000 pF = 100 nF = 0.1 µF
4-Digit EIA Code:
Code XYZW = XYZ × 10W pF
Example: 1001 = 100 × 101 pF = 1,000 pF = 1 nF
R Decimal Notation:
The letter R represents a decimal point in pF values. Example: 4R7 = 4.7 pF, R47 = 0.47 pF.
Tolerance Suffix:
J = ±5%, K = ±10%, M = ±20%, F = ±1%, G = ±2%. Small pF capacitors may use C = ±0.25 pF or D = ±0.5 pF.
Frequently Asked Questions (FAQ)
Q1: What does capacitor code 104 mean?
104 means 10 × 10⁴ pF = 100,000 pF = 100 nF = 0.1 µF.
Q2: What does capacitor code 475 mean?
475 means 47 × 10⁵ pF = 4,700,000 pF = 4.7 µF.
Q3: What does 4R7 mean on a capacitor?
In capacitor marking, R is a decimal point in picofarads, so 4R7 means 4.7 pF.
Q4: What code should I use for 0.1 µF?
0.1 µF equals 100 nF or 100,000 pF, so the standard 3-digit code is 104.
Q5: What code should I use for 47 pF?
47 pF is commonly written as 470, because 47 × 10⁰ pF = 47 pF.
Q6: Do all MLCCs have printed capacitance codes?
No. Many small MLCCs, especially 0201, 0402, and 0603 packages, may have no visible marking. Always verify reel labels, BOM data, or manufacturer documentation.
