CWR11JH156JC

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Tantalum capacitors are among the most robust and reliable passive electronic components available in the today\'s market. As they feature a low voltage tolerance and are typically used as bypass capacitors, these are commonly employed in applications that require high levels of performance and reliability. A popular example of a tantalum capacitor is the CWR11JH156JC. In this article, we\'ll explore this device\'s application field and working principle.

Physical Description

The CWR11JH156JC is a tubular, axial leaded device that features a round shape and measures 7.5 mm in diameter and 11 mm in length. The package is constructed out of a fabricated aluminum, offering a maximum working voltage of 6 volts. A polarity stripe is applied to one lead to identify which one is considered positive.

Shelf Life and Temperature Range

The CWR11JH156JC\'s shelf life is quite impressive: users can store the device at 25°C for up to 2 years, but at 85°C it reaches half of its rated and guaranteed peak for 15 years. In terms of working range, users should keep it at temperatures no higher than +125°C and no lower than -55°C. The maximum operating temperature varies between 70-105°C.

Dielectric

When it comes to their dielectric, tantalum capacitors are usually organized into three different technologies. This particular part falls in the MnO2 (Manganese Dioxide) category, although it\'s worth mentioning that this material is being replaced by a polymer dielectric, alternate known as Solid Polymer Capacitor.

Equivalent Series Resistance (ESR)

The presence of a dielectric will always define a device\'s equivalent series resistance, or ESR. In general, this refers to the amount of energy that is lost in the form of heat due to resistance in the circuit. The lower the ESR, the less energy is drained. The CWR11JH156JC presents an ESR of 6 ohms for a maximum working voltage of 6 volts. That is to say, as the voltage level rises, the ESR tends to decrease.

Capacitance Tolerance and Rated Voltage

This device offers an incredibly tight capacitance tolerance of up to ±10%, making it an ideal choice for many applications. Its rated voltage goes up to 6 volts, but it could be designed to operate at lower voltages based on the user\'s needs. It features a typical capacitance rating of 0.022uf (22nF).

Application Areas

Due to their reliability and robustness, tantalum capacitors like the CWR11JH156JC are frequently employed in a diverse array of application fields. They are commonly used as radio-frequency decoupling capacitors, be it for communications, defense electronics and the like. Due to their high stability, the device is also employed in various switching power-supply units, particularly those which present a relatively high ripple current requirements.

Working Principle

Tantalum capacitors work under a relatively simple principle. They are basically two electrically conductive surfaces that are separated from each other by a conductive material, called dielectric. When a voltage is applied, electric current will travel across this material, thus generating a charge. As the electric current continues, the material begins storing the charges, resulting in a capacitance.

Conclusion

In summary, the CWR11JH156JC is a reliable and adaptable capacitance element suitable for a wide range of applications. It is capable of tolerating up to 6 volts, and the MnO2 dielectric guarantees an impressive ESR rating, making this device a popular choice for power supply needs. Additionally, its low capacitance tolerance, coupled with its temperature tolerance, make it a reliable choice for any energy-related task.

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