Capacitor Number Code Calculator

Capacitance Formula:

\[ C = (digit1 \times 10 + digit2) \times 10^{multiplier} \, \text{pF} \]

Capacitance:

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1. What is a Capacitor Number Code Calculator?

Definition: This calculator decodes the 3-digit number found on ceramic capacitors to determine their capacitance value in picofarads (pF).

Purpose: It helps electronics engineers, technicians, and hobbyists quickly identify capacitor values without memorizing the numbering system.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ C = (digit1 \times 10 + digit2) \times 10^{multiplier} \, \text{pF} \]

Where:

\( C \) — Capacitance in picofarads (pF)
\( digit1 \) — First digit of the code
\( digit2 \) — Second digit of the code
\( multiplier \) — Power of ten multiplier (third digit)

Explanation: The first two digits form the significant figures, while the third digit represents the number of zeros to add.

3. Importance of Capacitor Codes

Details: Small ceramic capacitors use this numbering system because there's often not enough space to print the full value. Understanding these codes is essential for proper component selection.

4. Using the Calculator

Tips: Enter each digit of the 3-digit code separately. For example, code "104" would be 1 (first digit), 0 (second digit), 4 (multiplier).

5. Frequently Asked Questions (FAQ)

Q1: What does a code like "104" mean?
A: "104" means (1×10 + 0) × 10^4 = 10 × 10,000 = 100,000 pF or 100nF.

Q2: How do I read codes with letters?
A: Letters often indicate tolerance. For example, "104K" is 100nF with ±10% tolerance.

Q3: What about codes with only 2 digits?
A: Two-digit codes represent the value directly in pF (e.g., "47" = 47pF).

Q4: How do I convert pF to other units?
A: 1000pF = 1nF, 1000nF = 1μF. Our calculator shows values in pF.

Q5: What if my capacitor has a different marking system?
A: Other systems exist (like EIA codes). This calculator only handles standard 3-digit codes.