M39003/01-7032

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Tantalum capacitors are one of the most popular types of capacitors mainly due to their low cost, availability and their high capacitance per unit volume. M39003/01-7032 is a model of specialized tantalum capacitors which has very specific application fields and working principles.

Applications

M39003/01-7032 is an axial-lead, solid tantalum capacitor that is mainly used in small, low-noise power supply applications. It is designed to offer long-term stability in high-temperature, high-humidity environments. The temperature range for operating this part is -65°C to +125°C and the capacitance range is 10μF to 1k μF between 10 VDC and 50 VDC. It has an endurance of 2000 hours at +85°C, which is much higher than a normal tantalum capacitor.

This model of tantalum capacitor also finds extensive use as an input filter in high frequency supplies, decoupling networks, switched mode power supplies and military and aerospace applications due to its low leakage and high capacitance in a small size. It is the most popular choice for low noise power supplies, especially when the noise is in the low frequency range. It has an average ESR (Equivalent Series Resistance) of 3 ohms.

Function

Tantalum capacitors are polarized capacitors. They have two leads attached, one of which is marked as the positive terminal. This is a vital step as non-compliance with the polarity can lead to the destruction of the capacitor. M39003/01-7032 has a compliance voltage of 10VDC - 50 VDC and it is polarized by the groove along the body of the capacitor. The negative terminal corresponds to the end of the body that has the groove.

The capacitance of a capacitor depends on the length, width and the dielectric material of the capacitor. A quality tantalum capacitor like the M39003/01-7032 should have a good temperature coefficient, a low impedance and low leakage current (< 0.25CV/μA where C is the capacitance in μF and V is the working voltage). The capacitance should also be stable in varying environmental conditions like temperature and humidity.

The main working principle of M39003/01-7032 is that two conductive plates are separated by a dielectric material. The two leads are connected from the corresponding plates on either side. When a potential difference occurs, electrons are attracted and stored in one of the plates resulting in a charge stored in the capacitor. The amount of charge stored can be calculated by multiplying the capacitance (in Farads) with the potential difference (in Volts).

Conclusion

M39003/01-7032 is a model of specialized tantalum capacitors. It is mainly used for low-noise power supply applications, especially when the noise is in the lower frequency range. It can also be used as an input filter in high frequency supplies, decoupling networks, switched mode power supplies and military and aerospace applications. Its temperature range is -65°C to +125°C and its capacitance range is 10uF to 1k μF between 10 VDC and 50 VDC. It has an endurance of 2000 hours at +85°C, and its ESR is 3 ohms. It is polarized by the groove along the body of the capacitor, and its capacitance is determined by its length, width and the dielectric material of the capacitor.

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