The 221 Ceramic Capacitor is a compact non-polar ceramic capacitor with a capacitance value of 220pF (0.22nF or 0.00022μF). It is widely used in electronic circuits for filtering, noise suppression, signal coupling, tuning networks, crystal oscillator circuits, RF applications, and general-purpose circuit design.
The capacitor features a non-polarized design, allowing it to be connected in either direction, making installation simple and convenient for both prototyping and production applications.
Key Features of 221 Ceramic Capacitor
- Capacitance Value: 220pF (0.22nF / 0.00022μF)
- Capacitor Marking: 221
- Non-Polar Design: Can be connected in any orientation
- Stable Ceramic Dielectric: Reliable performance across a wide range of applications
- Compact Through-Hole Package: Easy PCB mounting and breadboard use
- Low Leakage Current: Suitable for signal and timing circuits
- High Reliability: Long operational lifespan
- Ideal for High-Frequency Applications: Commonly used in RF and oscillator circuits
Technical Specifications
- Product Type: Ceramic Capacitor
- Capacitance: 220pF
- Capacitance in nF: 0.22nF
- Capacitance in μF: 0.00022μF
- Capacitor Marking: 221
- Polarity: Non-Polarized
- Mounting Type: Through-Hole
- Dielectric Type: Ceramic
- Tolerance: Typically ±5% to ±20% (varies by manufacturer)
- Rated Voltage: Varies depending on model and manufacturer
- Lead Type: Radial Leads
- Operating Temperature: Depends on capacitor series
Understanding Capacitor Marking Code 221
The marking 221 follows the standard capacitor coding system:
- First two digits: 22
- Third digit: 1 (number of zeros)
Capacitance Calculation
22 × 10¹ = 220pF
Equivalent Capacitance Values
- 220pF
- 0.22nF
- 0.00022μF
How Ceramic Capacitors Work
A ceramic capacitor stores electrical energy in an electric field between two conductive plates separated by a ceramic dielectric material.
It is commonly used to:
- Filter unwanted electrical noise
- Stabilize voltage levels
- Pass AC signals while blocking DC
- Improve circuit performance in high-frequency applications
Applications of 220pF Ceramic Capacitor
- Arduino and microcontroller projects
- Crystal oscillator circuits
- RF circuits
- Frequency tuning networks
- Signal coupling and decoupling
- Noise filtering
- Communication equipment
- Antenna matching circuits
- Educational electronics projects
Advantages of Non-Polar Ceramic Capacitors
- Non-polarized for easy installation
- Compact and lightweight
- Low cost and highly reliable
- Suitable for high-frequency operation
- Long service life
- Stable electrical characteristics
Installation and Usage Tips
- Verify the capacitance value before installation.
- Use within the capacitor’s voltage rating.
- Keep leads as short as possible in RF and high-frequency circuits.
- Store in a dry environment to maintain reliability.
- Suitable for both breadboard prototyping and PCB designs.
Note: Images are for Illustration Purposes Only.
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