M39003/03-0454/HSD

Operating Temperature:	-55°C ~ 125°C
Failure Rate:	S (0.001%)
Features:	Military
Manufacturer Size Code:	C
Lead Spacing:	--
Height - Seated (Max):	--
Size / Dimension:	0.289" Dia x 0.686" L (7.34mm x 17.42mm)
Package / Case:	Axial
Mounting Type:	Through Hole
Lifetime @ Temp.:	--
Series:	Military, MIL-PRF-39003/3, CSR23
ESR (Equivalent Series Resistance):	--
Type:	Hermetically Sealed
Voltage - Rated:	20V
Tolerance:	±10%
Capacitance:	56µF
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Tantalum Capacitors: M39003/03-0454/HSD Application Field and Working Principle

Tantalum capacitors are components used for filtering, bypassing and coupling power supplies. They are usually associated with low voltage, high capacitance applications in which the failure of the component can lead to a critical system failure. This article will discuss the application field and working principle for M39003/03-0454/HSD, a type of tantalum capacitor.

What are Tantalum Capacitors?

Tantalum capacitors are cylindrical, solid, electrolytic capacitors that can store electrical energy; they differ from traditional aluminum electrolytic capacitors, because they are constructed from tantalum instead of aluminum. The material gives them a few advantages, including high volumetric efficiency, low leakage current, high capacitance stability over temperature, and low susceptibility to failure due to thermal shock.The most common type of tantalum capacitor is the wet tantalum capacitor, because it offers the highest capacitance values from a small size. These chips come in standard sizes from very small to medium, and are ideal for use in high-density applications such as handheld devices and printers.For military or high-reliability applications, the dry tantalum capacitors are usually preferred, as they have superior reliability and a long operational life over wide temperature ranges.

M39003/03-0454/HSD

The M39003/03-0454/HSD is a wet hermetically sealed, axial leaded, solid tantalum capacitor. It is a popular choice for capacitors in military and aerospace applications due to its high reliability and operating life.The construction of M39003/03-0454/HSD is a three-piece design, with an anode of solid tantalum, a solid manganese dioxide electrolyte, and a cathode of palladium silver. The anode is formed into a cup shape to increase the effective capacitance. The capacitor is immersed in a highly volatile electrolyte, which is sealed with a hermetic seal to ensure a long operational life.

Application Field and Working Principle

The M39003/03-0454/HSD is primarily used as a bypass capacitor to provide local filtering in equipment sealed against harsh environmental conditions. The capacitor blocks direct current while allowing alternating current to pass, while maintaining electrical characteristics at low temperatures. It’s also highly resistant to corrosion and other environmental effects, and offers low ESR – the equivalent series resistance.The capacitor works on the principle of electrochemical double-layer, wherein two things are effectively two layers of electricity. Firstly, a thin layer of ions form on the surface of the anode which acts as a semi-conductor. Secondly, a thin layer of electrolytic solution forms on top of the anode which acts as an insulator. During operation, the capacitor allows electric current to flow between the two layers and maintains a balance of charge between them. This process is known as charging and discharging, and results in a small buildup of energy, which is stored in the capacitor.

Conclusion

M39003/03-0454/HSD is a wet, hermetically sealed, axial leaded, solid tantalum capacitor that is typically used in military and aerospace applications. It offers high reliability and a long operating life over wide temperature ranges, and works on the principle of electrochemical double-layer. The capacitor serves as a bypass capacitor and provides local filtering in equipment sealed against harsh environmental conditions. It offers low ESR and high resistance to corrosion and other environmental effects.

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