C2012X7R1E225K
Compact multilayer ceramic capacitors for surface-mount electronic applications
Manufacturer： tdk
series introduction
# Introduction to the C2012X7R1E225K Product Series
## 1. Overview
The C2012X7R1E225K product series belongs to the category of ceramic capacitors. These components are essential building - blocks in modern electronic circuits, playing a crucial role in a wide range of applications due to their unique electrical properties and physical characteristics.
## 2. Naming Convention
Let's break down the product code "C2012X7R1E225K" to understand its key features:
- **C**: This typically indicates that the component is a capacitor.
- **2012**: Refers to the package size of the capacitor. In the imperial measurement system, 2012 corresponds to a length of 0.20 inches (5.08 mm) and a width of 0.12 inches (3.05 mm). This standard size makes it compatible with many printed circuit board (PCB) designs and surface - mount technology (SMT) assembly processes.
- **X7R**: This is the dielectric type. X7R is a Class II ceramic dielectric. It offers a good balance between capacitance stability, temperature coefficient, and cost. The "X" indicates that the capacitor can operate at a minimum temperature of - 55°C, and the "7" means it can function up to a maximum temperature of +125°C. The "R" implies that the capacitance change over this temperature range is within ±15%.
- **1E**: The "1E" represents the voltage rating. In the EIA (Electronic Industries Alliance) code system, "1E" corresponds to a rated voltage of 25V. This means the capacitor is designed to operate safely at a maximum DC voltage of 25 volts.
- **225**: This is the capacitance value code. Using the standard three - digit code for capacitors, the first two digits (22) are the significant figures, and the third digit (5) is the multiplier. So, the capacitance value is \(22\times10^{5}\) picofarads (pF), which is equivalent to 2.2 microfarads (\(\mu F\)).
- **K**: The letter "K" indicates the tolerance of the capacitance value. A "K" tolerance means that the actual capacitance of the capacitor can vary by ±10% from the nominal value of 2.2 \(\mu F\).
## 3. Electrical Characteristics
### Capacitance
With a nominal capacitance of 2.2 \(\mu F\), the C2012X7R1E225K capacitors are suitable for applications that require energy storage, filtering, and coupling. For example, in power supply circuits, they can store electrical energy and release it when needed to smooth out voltage fluctuations.
### Temperature Stability
Thanks to the X7R dielectric, these capacitors maintain relatively stable capacitance values over a wide temperature range from - 55°C to +125°C. This makes them ideal for use in environments where temperature variations are significant, such as automotive electronics, industrial control systems, and outdoor communication equipment.
### Voltage Rating
The 25V voltage rating ensures that the capacitors can handle the electrical stress in circuits operating at or below this voltage level. It is important to note that exceeding the rated voltage can lead to dielectric breakdown and permanent damage to the capacitor.
### Tolerance
The ±10% tolerance means that the actual capacitance of the capacitor can be anywhere between 1.98 \(\mu F\) (2.2 \(\mu F\times(1 - 0.1)\)) and 2.42 \(\mu F\) (2.
Images for reference
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C Series 0805(2012 Metric) 13
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