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Tantalum - Polymer Capacitors

T540B686K004AH8710: Application Field and Working Principle

Tantalum-polymer capacitors, or Ta-Polymer for short, are one of the most popular types of surface-mount capacitors. The T540B686K004AH8710 is a capacitance grade Ta-Polymer capacitor, featuring high capacitance and high ripple current capability. It is widely used in consumer electronics, automotive electronics, and medical applications.

This particular part from the Ta-Polymer series has the following features: its capacitance is 0.68µF, it has a voltage rating of 10V, and an operating temperature range of -55 °C to +125 °C.

What are Tantalum - Polymer Capacitors?

Tantalum-polymer capacitors are a type of surface-mount capacitor that uses polymer electrolytic paste to achieve higher capacitance in a smaller package. This paste is often formed of polyalkene, polyanhydride, or polyvinyl alcohol, and because of its unique molecular structure, it allows a capacitor to store more charge than a conventional aluminum electrolytic capacitor.

The most common advantages of Ta-Polymer capacitors include their higher capacitance, higher ripple current capability, improved electrical endurance, and lower dielectric losses. They are also relatively low cost and can be manufactured smaller, making them ideal for space-constrained applications.

How do Tantalum - Polymer Capacitors Work?

Tantalum-polymer capacitors work by combining two different materials: a metallic tantalum core, and a polymer electrolytic paste. The metallic core is composed of a tantalum powder that’s pressed and heated to form a thin, porous structure. This structure is then polarized and charged by the polymer electrolytic paste which is often a combination of polymers, salts, and other materials.

When a voltage is applied, the positive charge will force the negative charges of the electrolytic paste into the metallic core, creating an electric field. This field will store energy and provide higher performance for the device which the capacitor is connected to. The same principle can be applied to both low voltage and high voltage circuits.

T540B686K004AH8710 Applications

Given its small size, and its high capacitance and ripple current performance, the T540B686K004AH8710 is an ideal capacitor for a wide range of low power applications. This includes:

• Consumer Electronics
• Industrial Control Systems
• Medical Applications
• Automotive Electronics
• Portable Devices

Conclusion

Tantalum-polymer capacitors are a type of cost-effective, space-saving surface-mount capacitor that are ideal for a wide range of low power applications. The T540B686K004AH8710, a capacitance grade Ta-Polymer capacitor, is no exception to this, and is often used in consumer electronics, automotive electronics, and medical applications. It features a capacitance of 0.68µF, a voltage rating of 10V, and an operating temperature range of -55 °C to +125 °C.

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