Below is a table showcasing normalized capacitor values based on the E12 series. These values are widely used in electronic circuit design and manufacturing for their practicality and standardization.
Nominal Value (μF) | Tolerance (%) | Maximum Voltage (V) |
---|---|---|
1.0 | ±20 | 50 |
1.2 | ±20 | 50 |
1.5 | ±20 | 50 |
1.8 | ±20 | 50 |
2.2 | ±20 | 50 |
2.7 | ±20 | 50 |
3.3 | ±20 | 50 |
3.9 | ±20 | 50 |
4.7 | ±20 | 50 |
5.6 | ±20 | 50 |
6.8 | ±20 | 50 |
8.2 | ±20 | 50 |
10 | ±20 | 50 |
12 | ±20 | 25, 35, 50, 63 |
15 | ±20 | 25, 35, 50, 63 |
18 | ±20 | 25, 35, 50, 63 |
22 | ±20 | 10, 16, 25, 35, 50, 63, 100 |
27 | ±20 | 10, 16, 25, 35, 50, 63, 100 |
33 | ±20 | 10, 16, 25, 35, 50, 63, 100 |
39 | ±20 | 10, 16, 25, 35, 50, 63, 100 |
47 | ±20 | 10, 16, 25, 35, 50, 63, 100 |
56 | ±20 | 10, 16, 25, 35, 50, 63, 100 |
68 | ±20 | 10, 16, 25, 35, 50, 63, 100 |
82 | ±20 | 10, 16, 25, 35, 50, 63, 100 |
Notes:
- Tolerance: The values above are based on the E12 series, offering a ±20% tolerance typically found in electrolytic capacitors.
- Voltage Ratings: The voltage column indicates the maximum safe operating voltage for the capacitor. Always verify the exact ratings for specific projects.
- Practical Usage: These values simplify component selection, making the E12 series ideal for general-purpose electronic design.
Importance of Choosing the Right Capacitor
Selecting capacitors with the correct value, tolerance, and voltage rating is crucial for ensuring circuit stability and reliability. Misjudging these factors can lead to operational failures or reduced efficiency in your electronic systems.
FAQ
1. What is the E12 series?
The E12 series is a standard set of 12 logarithmically spaced values per decade used for resistors and capacitors. These values simplify inventory management and design in electronics.
2. Why are capacitors classified by tolerance?
Capacitors are classified by tolerance to indicate how much their actual capacitance can deviate from the nominal value. For example, ±20% means the capacitance may vary 20% above or below the stated value.
3. Can I use a capacitor with a higher voltage rating than required?
Yes, using a capacitor with a higher voltage rating is safe and may enhance longevity. However, it can be more expensive and physically larger than needed.
4. What happens if I use the wrong capacitor value?
Using an incorrect value can cause circuit malfunction, affect timing or filtering properties, or even damage components.