Tantalum Capacitors

Tantalum capacitors are polarized capacitors with an anode made of tantalum, which is etched and thin-oxide-dielectric-coated. An electrolyte, either a liquid or solid, is used as the cathode. These capacitors provide higher energy density than an equivalent aluminum electrolytic capacitor, while their larger size and higher cost can limit their use. They are used in a variety of electronic devices, including automotive electronics, avionics, telecom equipment, and professional audio equipment.

TPME687M004R0018 Application Field and Working Principle

The TPME687M004R0018 is a high-frequency, high-temperature, and low-ESR (Equivalent Series Resistance) tantalum capacitor. It is suitable for use in high-speed computing, communication, and high-power converters control circuits. It can also be used in various telecommunications and avionics applications. The TPME687M004R0018 is an electrolytic capacitor, which uses a tantalum-coated anode and an electrolyte as the cathode. Its main benefits include its high reliability, low polarization and high temperature stability.

The working principle of a tantalum capacitor is based on the polarization of the material. The tantalum anode is created by etching a thin layer of oxide dielectric onto the material. This layer creates a thin layer of dielectric material between the two surfaces and prevents current leakage. The electrolyte acts as the cathode and provides the capacitance. When a voltage is applied, a charge imbalance develops between the anode and cathode, creating a potential between them. This potential provides the capacitance that allows the capacitor to store energy.

The TPME687M004R0018 tantalum capacitor is a low-ESR device, meaning that the equivalent series resistance is lower than with other types of capacitors. This makes them ideal for high-frequency or switching applications where the ESR can increase power losses. It also provides a higher temperature stability than regular tantalum capacitors, making it suitable for harsh environments.

The TPME687M004R0018 is designed to operate at a voltage of 6.3 Vdc and is rated for a capacitance of 3500nF. It has a current rating of 3A and a temperature range of -55 to +125 Celsius. The TPME687M004R0018 is available in a variety of package configurations, including SMD (Surface Mount Device), leaded, and SMA (Surface Mount Assembly). It is also RoHS (Restriction of Hazardous Substances) compliant.

The TPME687M004R0018 tantalum capacitor is a reliable and cost-effective choice for a wide range of applications. Its high energy density, low ESR, and high temperature stability make it ideal for high-frequency and switching circuits, as well as for harsh industrial environments. The TPME687M004R0018 is available in a variety of package configurations, making it a versatile and flexible choice for a wide range of applications.