C3225X7R2E224K
High-voltage ceramic capacitors for surface-mount electronic circuits
Manufacturer： tdk
series introduction
# Introduction to the C3225X7R2E224K Product Series
## 1. Overview
The C3225X7R2E224K product series belongs to the category of multilayer ceramic capacitors (MLCCs). These capacitors are essential passive electronic components widely used in various electronic circuits to store and release electrical energy, filter signals, and stabilize voltage levels. The specific model designation “C3225X7R2E224K” contains a wealth of information about the capacitor's characteristics and specifications.
## 2. Physical Dimensions
The “C3225” in the model number indicates the capacitor's physical size, following the industry - standard EIA (Electronic Industries Alliance) code. In this case, it represents a 3216 metric size, which is equivalent to 3.2mm in length and 2.5mm in width. This relatively compact size makes the C3225X7R2E224K suitable for use in densely populated printed circuit boards (PCBs), where space is often at a premium.
## 3. Dielectric Material
The “X7R” refers to the dielectric material used in the capacitor. X7R is a Class II dielectric, known for its good temperature stability and relatively high capacitance values. It has a temperature coefficient of ±15% over a temperature range of - 55°C to +125°C. This means that the capacitance of the C3225X7R2E224K capacitor will remain within 15% of its nominal value across this wide temperature range, making it suitable for applications that may experience significant temperature variations.
## 4. Voltage Rating
The “2E” in the model number represents the voltage rating of the capacitor. In the EIA coding system, “2E” corresponds to a voltage rating of 250V. This voltage rating indicates the maximum DC or peak AC voltage that the capacitor can safely withstand without experiencing breakdown or other forms of electrical failure. It is crucial to select a capacitor with an appropriate voltage rating for the specific application to ensure reliable operation.
## 5. Capacitance Value
The “224” in the model number is used to denote the capacitance value of the capacitor. In the standard capacitor coding system, the first two digits (22) are the significant figures, and the third digit (4) is the multiplier. So, the capacitance value is calculated as 22 × 10⁴ pF, which is equal to 220,000 pF or 0.22 μF. This capacitance value determines the amount of electrical charge that the capacitor can store and is a key parameter in many circuit designs.
## 6. Tolerance
The “K” at the end of the model number indicates the capacitance tolerance. “K” represents a tolerance of ±10%. This means that the actual capacitance of the C3225X7R2E224K capacitor can vary by up to 10% from its nominal value of 0.22 μF. For example, the actual capacitance could range from 0.198 μF to 0.242 μF.
## 7. Applications
- **Power Supply Circuits**: The C3225X7R2E224K capacitors can be used in power supply filtering circuits to smooth out the DC voltage and reduce ripple. Their relatively high capacitance and good temperature stability make them suitable for maintaining a stable power supply in various electronic devices.
- **Signal Coupling and Decoupling**: In audio and radio frequency (RF) circuits, these capacitors can be used for signal coupling, allowing AC signals to pass while blocking DC components
Images for reference
C SERIES_1210_2.2
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C Series 1210(3225 Metric) 25
C SERIES_1210_2.2