Operating Temperature:	-55°C ~ 125°C
Failure Rate:	C (0.01%)
Features:	Military
Manufacturer Size Code:	D
Lead Spacing:	--
Height - Seated (Max):	--
Size / Dimension:	0.351" Dia x 0.786" L (8.92mm x 19.96mm)
Package / Case:	Axial
Mounting Type:	Through Hole
Lifetime @ Temp.:	--
Series:	Military, MIL-PRF-39003/9, CSR21
ESR (Equivalent Series Resistance):	110 mOhm
Type:	Hermetically Sealed
Voltage - Rated:	35V
Tolerance:	±10%
Capacitance:	47µF
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Tantalum Capacitors

M39003/09-3064 Application Field and Working Principle

Tantalum capacitors are extremely efficient, sophisticated components used to store electrical energy. Developed by the American Carlisle Corporation in the 1950s, these capacitors offer several advantages over other types, including better vibration resistance and lower voltage leakage. The M39003/09-3064 is one example of a tantalum capacitor, and its use in many industries. Furthermore, it’s essential to know the working principles involved in order to make the most of its unique advantages.

Field of Application

Tantalum capacitors like the M39003/09-3064 are used in many different, specialized fields. In consumer electronics, they are commonly used in cell phones, tablets, laptops, and more. In the aircraft and automotive industry, they’re used to support several other components, power systems, and structures. In medical equipment, they ensure long-term reliability and robustness, and are often found in medical imaging technologies like MRI, CT scanners, ultrasound devices, and X-ray machines.

Construction Materials

The M39003/09-3064 features several components. Commonly used as a radial-leaded capacitor, it has a tantalum sheet body encased in a dielectric material. This is important, as it helps maintain the integrity of the capacitor. The two leads, known as anode and cathode, conduct electricity. A high-quality solder is recommended to ensure a reliable connection between leads and circuit board.

Working Principle

Tantalum capacitors, like the M39003/09-3064, use a tantalum sheet base for their construction. The sheet base is either of two types: manganese dioxide (MnO2) or polymer solid electrolyte (PSE). The anode lead of the capacitor is attached to the sheet, while the cathode lead extends out into the atmosphere. When electricity flows through the capacitor, the sheet acts as a dielectric, allowing the formation of an electrostatic field between the anode and the cathode. This creates a space, known as the dielectric gap,which acts as a capacitor, storing the electricity.

Encapsulation

The M39003/09-3064, like all other tantalum capacitors, is encased in a protective material which prevents moisture and dust from entering the dielectric material and disrupting the electric field. This material, usually called a conformal coating, also prevents corrosion and helps protect the capacitor from vibration and shock. The coating may also be infused with antifungal or waterproofing agents to further safeguard the capacitor.

Limitations

Despite its impressive advantages, tantalum capacitors have their own set of limitations. It’s important to be aware of these when considering their use in a specific context. First of all, the anode and cathode leads are vulnerable to heat, and so the capacitor must be carefully placed and used in order to maintain its functionality. Secondly, the capacitor has a relatively small charge-per-volume ratio compared to other types of capacitors. Last but not least, the leads are prone to corrosion, so it is essential to provide a conformal coating and ensure high quality lead connections.

Conclusion

The M39003/09-3064 is an exceptional capacitor, form RCD components, Inc., that offers increased efficiency, reliability, and robustness in a variety of industrial and consumer applications. It features a tantalum sheet body encased in a dielectric material, and two leads for electrical connection. In addition, the capacitor is protected by a conformal coating which prevents corrosion, moisture, and other types of damage. Although it has some limitations due to its electrical components, its superb vibration resistance systems make it an ideal choice for applications which require robustness and long-term reliability.

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