Components: Tantalum Polymer Chip Capacitors Operate At Up To 125°C

March 3, 2005
Tantalum polymer chip capacitors in the B4529W series are derated for, and can operate at, ambient temperatures up to 125°C (66% of the rated voltages of 2.5 to 10 V). This suits them for switching power supplies involved in large-scale integration

Tantalum polymer chip capacitors in the B4529W series are derated for, and can operate at, ambient temperatures up to 125°C (66% of the rated voltages of 2.5 to 10 V). This suits them for switching power supplies involved in large-scale integration of active and passive components in a minimum amount of space. They come in D, E, and V case sizes, with capacitance values from 100 to 680 mF. Equivalent series resistance (ESR) is typically less than 35 mV. A 220-mF, 620%, 40-mV ESR capacitor (the B45296W2227M52) costs $0.70 each in large volumes.

Epcos Inc.www.epcos.com; (800) 888-7729

About the Author

Roger Allan

Roger Allan is an electronics journalism veteran, and served as Electronic Design's Executive Editor for 15 of those years. He has covered just about every technology beat from semiconductors, components, packaging and power devices, to communications, test and measurement, automotive electronics, robotics, medical electronics, military electronics, robotics, and industrial electronics. His specialties include MEMS and nanoelectronics technologies. He is a contributor to the McGraw Hill Annual Encyclopedia of Science and Technology. He is also a Life Senior Member of the IEEE and holds a BSEE from New York University's School of Engineering and Science. Roger has worked for major electronics magazines besides Electronic Design, including the IEEE Spectrum, Electronics, EDN, Electronic Products, and the British New Scientist. He also has working experience in the electronics industry as a design engineer in filters, power supplies and control systems.

After his retirement from Electronic Design Magazine, He has been extensively contributing articles for Penton’s Electronic Design, Power Electronics Technology, Energy Efficiency and Technology (EE&T) and Microwaves RF Magazine, covering all of the aforementioned electronics segments as well as energy efficiency, harvesting and related technologies. He has also contributed articles to other electronics technology magazines worldwide.

He is a “jack of all trades and a master in leading-edge technologies” like MEMS, nanolectronics, autonomous vehicles, artificial intelligence, military electronics, biometrics, implantable medical devices, and energy harvesting and related technologies.

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