Polyester Capacitor Color Code Calculator

What is a Polyester Capacitor Color Code Calculator?

A Polyester Capacitor Color Code Calculator is a tool that helps decode the capacitance value of polyester film capacitors based on the color bands printed on them. Unlike ceramic capacitors (which use numeric codes), some polyester capacitors use a color-coded system similar to resistor color codes.

This calculator interprets the color bands to determine:

• Capacitance value (in picofarads, nanofarads, or microfarads)
• Tolerance (precision range of the capacitor)
• Voltage rating (in some cases)

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Why Use a Polyester Capacitor Color Code Calculator?

• Quick and Accurate: Helps identify capacitor values without needing a datasheet.
• Essential for Repair & Assembly: Useful for working with older or unmarked components.
• Educational Tool: Helps students and hobbyists learn about capacitors.
• Avoid Errors: Prevents misinterpretation of colors, which can lead to circuit failure.

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How Does a Polyester Capacitor Color Code Calculator Work?

1. Input Required:

   • Select the colors of the bands (usually 3–6 bands).
   • Identify if the last band represents tolerance or voltage.

2. Processing:

   • Matches each color to its corresponding value based on capacitor coding rules.
   • Computes the capacitance using the standard multiplier.
   • Determines tolerance and (if applicable) voltage rating.

3. Output:

   • Capacitance value (e.g., 0.1 µF, 100nF, 220pF).
   • Tolerance percentage (e.g., ±5%, ±10%).
   • Voltage rating (if marked).

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When to Use a Polyester Capacitor Color Code Calculator?

• Electronics Repair & Testing: Identifying unmarked or worn capacitors.
• Circuit Design & Assembly: Selecting correct capacitor values for a project.
• Educational Purposes: Learning about capacitor coding and electronics.
• Reverse Engineering: Understanding components in old circuits.