M39003/09-0103H

Operating Temperature:	-55°C ~ 125°C
Failure Rate:	P (0.1%)
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-39003/9, CSR21
ESR (Equivalent Series Resistance):	65 mOhm
Type:	Hermetically Sealed
Voltage - Rated:	6V
Tolerance:	±20%
Capacitance:	150µF
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Tantalum Capacitors

Tantalum capacitors are essential components of modern electronic circuits. They are used to provide energy storage for circuits, dampen transients, and to filter noise. The M39003/09-0103H is a popular choice among designers for its moderate capacitance of .47 μF and its low ESR of 100 mΩ.

M39003/09-0103H Application Field

The M39003/09-0103H is best suited for low voltage, low current applications. Its low ESR and small size, 11mm x 5.3mm, make it an ideal choice for applications such as portable electronics, computer motherboards, and car radios. Its X7R dielectric allows for a wide voltage range of 4.5VDC-16VDC, making it a versatile choice for many types of electronic devices.

M39003/09-0103H Working Principle

Tantalum capacitors rely on a basic charge-discharge principle. When the capacitor is connected to a voltage source, electrons flow through the capacitor, causing the electrolyte to become ionized. This buildup of charge creates an electric field inside the capacitor, which stores energy. When the capacitor is disconnected from the voltage source, the charge begins to slowly die off and the capacitor is said to be “discharging”. When a tantalum capacitor is placed in circuit, the electrolyte begins to ionize when current is applied. The current flowing through the capacitor causes positive ions to move from the anode to the cathode, while negatively charged electrons migrate from the cathode to the anode. This creates a separation of charge, which then forms an electric field inside the capacitor. This electric field is responsible for storing energy. This stored energy can then be discharged through the capacitor when the current is removed.

Conclusion

The M39003/09-0103H is a ceramic capacitor that offers a moderate capacitance of .47 μF and a low ESR of 100 mΩ. This makes it ideal for low current and low voltage applications, such as portable electronics, car radios, and computer motherboards. Its X7R dielectric allows for a wide voltage range of 4.5VDC-16VDC. The M39003/09-0103H works on the basic charge-discharge principle, where current flowing through the capacitor causes positive ions to move from the anode to the cathode, while negatively charged electrons migrate from the cathode to the anode, resulting in a stored energy.

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