C0402C104J4RACTU
Compact 0.1uF ceramic capacitors for surface-mount electronic circuits
Manufacturer： kemet
series introduction
# Introduction to the C0402C104J4RACTU Product Series
## 1. Overview
The C0402C104J4RACTU product series belongs to the category of ceramic capacitors. These capacitors are widely used in various electronic circuits due to their excellent electrical properties, compact size, and high reliability. The naming convention of C0402C104J4RACTU provides important information about the capacitor's characteristics.
- **C0402**: This indicates the physical size of the capacitor. In the industry - standard surface - mount device (SMD) sizing system, 0402 corresponds to a length of 0.04 inches (1.0 mm) and a width of 0.02 inches (0.5 mm). This small form - factor makes it ideal for applications where space is at a premium, such as in mobile devices, wearables, and other miniaturized electronics.
- **C**: Usually represents the ceramic dielectric material used in the capacitor. Ceramic dielectrics offer several advantages, including high dielectric constant, low loss, and good temperature stability.
- **104**: This is the capacitance value code. In the capacitor coding system, the first two digits are significant figures, and the third digit is the multiplier. So, 104 means \(10\times10^{4}\) picofarads (pF), which is equivalent to 0.1 microfarads (\(\mu F\)).
- **J**: Indicates the tolerance of the capacitance value. A 'J' tolerance means ±5%. This level of tolerance ensures that the actual capacitance of the capacitor will be within 5% of the nominal value (0.1 μF in this case), which is important for circuits that require precise capacitance values.
- **4R**: This part of the code may be related to specific electrical or mechanical characteristics defined by the manufacturer, such as rated voltage, temperature coefficient, or other performance - related parameters.
- **AC**: Could be a code for a particular series or family within the manufacturer's product line, indicating certain common features or design optimizations.
- **TU**: May represent additional manufacturing - specific information, such as the packaging type or a particular production batch.
## 2. Electrical Properties
### Capacitance
As mentioned earlier, the nominal capacitance of the C0402C104J4RACTU series is 0.1 μF with a tolerance of ±5%. This capacitance value is suitable for a wide range of applications, including decoupling, filtering, and coupling in electronic circuits. Decoupling capacitors are used to provide a local reservoir of charge to smooth out voltage fluctuations in power supply lines, while coupling capacitors are used to transfer AC signals between different stages of a circuit while blocking DC components.
### Voltage Rating
The voltage rating of the capacitor is an important parameter that determines the maximum voltage that can be safely applied across the capacitor without causing breakdown. The specific voltage rating for the C0402C104J4RACTU series is defined by the '4R' code in the part number. A higher voltage rating allows the capacitor to be used in circuits with higher operating voltages, but it may also result in a larger physical size or different electrical characteristics.
### Dielectric Loss
Ceramic capacitors in the C0402C104J4RACTU series typically have low dielectric loss. Dielectric loss is the energy dissipated as heat when an alternating current (AC) is applied to the capacitor. Low dielectric loss is desirable in high - frequency applications, as it reduces power consumption and improves the efficiency of the circuit.
### Temperature Coefficient
The temperature coefficient of the capacitor indicates how the capacitance value changes with temperature. Ceramic
Images for reference
0402 PKG
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