M39003/09-0039/TR

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Tantalum capacitors are widely used in many industries due to their long-term reliability and small size. They are mainly used for energy storage, signal conditioning, and rectification in applications like audio, automotive, and power supplies. The M39003/09-0039/TR is a conventional, molded, miniaturized tantalum capacitor from Mil-PRF-39003 series. It is typically used as a decoupling or filter capacitor in power supplies, automotive electronics, and communication devices.

The M39003/09-0039/TR is a Radial Lead Version doped anode with a Dissimilar Metal Oxide (DMO) electrode, also known as Solid Tantalum Electrolytic Capacitor. Its design provides low inrush current, superior temperature coefficient, and extended reliability. The capacitor uses a combination of manganese dioxide (MnO2) coupled with a Ta02 anode to achieve a capacitance up to 390uF in a small surface-mount package. The manganese dioxide ensures superior electrical properties, and the tantalum oxide ensures high reliability and extended shelf life of the capacitor.

The M39003/09-0039/TR is also available with a range of other features such as humidity-resistant coating, reverse discharge protection, and external solder-joint protection. It is typically soldered to the circuit board via its axial leads. The capacitor is rated for a temperature range of -55C to +105C and carries an Operating Life Rating of up to 2000 hours at 125C. It is also tested for Capacitance Loss, Resistance, DC Leakage, and Insulation Resistance.

The working principle of the M39003/09-0039/TR is based on the capacitive reactance phenomenon. In a capacitor, when a voltage is applied across its terminal electrodes, a capacitive current is generated. The amount of capacitive current generated depends on the capacitance value of the capacitor and the frequency of the applied voltage. The equivalent circuit of the M39003/09-0039/TR is illustrated in Figure 1. The equivalent circuit of the capacitor consists of two series resistances Rs and Re, a shunt resistance Rd, and a parallel capacitance C.

Figure 1: Equivalent Circuit of the M39003/09-0039/TR

At low frequencies, the capacitor stores large amounts of electric charge and thus has a very low series resistance. As the frequency of the applied voltage increases, the electric charge stored in the capacitor decreases and the series resistance increases. This is why capacitors can be used for filtering applications since higher frequency components of an electrical signal can be blocked. At a frequency of 1MHz, the M39003/09-0039/TR has a series resistance of 4.4 ohms and a series inductance of 0.30uH. The capacitor also has a shunt resistance of 0.30 ohms.

In conclusion, the M39003/09-0039/TR is a conventional, molded, miniaturized tantalum capacitor that is widely used for energy storage, signal conditioning, and rectification in applications like audio, automotive, and power supplies. It uses a combination of manganese dioxide and tantalum oxide to achieve a capacitance up to 390uF in a small surface-mount package. It is rated for a temperature range of -55C to +105C and is tested for Capacitance Loss, Resistance, DC Leakage, and Insulation Resistance. The capacitor has a low series resistance at low frequencies and can be used in filtering applications. The specific data is subject to PDF, and the above content is for reference