CWR26HH336KCFA\TR

Operating Temperature:	-55°C ~ 125°C
Failure Rate:	C (0.01%)
Features:	Military
Manufacturer Size Code:	F
Lead Spacing:	--
Height - Seated (Max):	0.085" (2.16mm)
Size / Dimension:	0.220" L x 0.135" W (5.59mm x 3.43mm)
Package / Case:	2214 (5634 Metric)
Mounting Type:	Surface Mount
Lifetime @ Temp.:	--
Series:	Military, MIL-PRF-55365/13, CWR26
ESR (Equivalent Series Resistance):	800 mOhm
Type:	Conformal Coated
Voltage - Rated:	15V
Tolerance:	±10%
Capacitance:	33µF
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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Tantalum Capacitors

Tantalum capacitors are a type of electrolytic capacitors that have immense applications in industrial operations. Consisting of tantalum powder as the anode, an oxide coating as the dielectric, and a palladium cathode, these electrical components have been playing a major role in stabilizing electrical systems since decades. The CWR26HH336KCFA/TR, specifically, is a device designed for moderate to high stresses and is capable of withstanding up to two times the rated voltage with a rated ripple current for the given frequency.

Working Principle

The construction of a tantalum capacitor is basically a cylinder filled with a tantalum powder, which is pressed into a rod-like shape. The anode material, typically a tantalum pentoxide, is spread across the surface of the powder-filled case. It is then heat sealed closed, during which time the anode film is compressed to form a dielectric. In the presence of an electrolyte, negative ions diffuse and are trapped in the anode material forming a so-called multilayer dielectric.The capacitor’s positive electrode is typically made from perforated cathode material such as palladium or manganese. The cathode, defines the capacitor’s capacitance. It works by increasing resistance to the positive side of the capacitor, reducing charge transfer across the capacitor. As voltage is applied, a counter charge will form on the negative side and the counter charge will oppose the original charge. This opposition keeps the voltage from rising any higher than its rated capacity.

Characteristics and Applications

Tantalum capacitors are capable of offering a higher capacitance for the same amount of physical volume compared to other types of capacitor. Some of its other characteristics include low leakage currents, reliability, and stability. As for their applications, one of the most common uses of the CWR26HH336KCFA/TR in particular is as a voltage filter. They are used to regulate any variations of voltage across a range of frequencies, which is especially useful in power converters, relays, and digital circuits. Furthermore, they are often found in circuits that are exposed to high temperatures and high shock impacts, such as in military and aerospace applications.

Advantages and Disadvantages of Tantalum Capacitors

The use of tantalum capacitors has many advantages over other forms of capacitor, such as improved reliability, lower DC leakage current, greater capacitance-volume ratios, and low temperature coefficients. Additionally, they are known to be extremely resistant to surge currents and extreme temperatures. On the other hand, one of the major drawbacks of using these devices is their need for a protective circuit due to their low tolerance for voltage spikes. Additionally, as they are electrically active, any failure in the anode can lead to an abrupt loss of capacitance.

Conclusion

Tantalum capacitors are valued for their reliability, low leakage currents, and higher capacitance-volume ratios. Additionally, they are known to be extremely resistant to surge currents and extreme temperatures. They are widely used in industrial operations, ranging from military and aerospace applications to power converters, relays, and digital circuits. Therefore, the CWR26HH336KCFA/TR is one such device that finds its application in a wide variety of operation, due to its high tolerance for voltage spikes and its ability to be stable in an array of temperatures.

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