High-temperature wet electrolytic tantalum capacitors

AVX has extended its TWA-Y Series wet electrolytic tantalum capacitors with the addition of new, high CV 470µF/100V and 1,000µF/75V components. The components act as drop-in replacements for existing M39006-style wet tantalum capacitors in applications that may require operation at temperatures spanning 125C to 200C. TWA-Y Series wet tantalum capacitors are designed for continuous operation at 200C (with applicable derating) and provide endurance ratings up to 2,000 hours. Featuring a unique cathode system that enables high CV performance in standard DSCC case sizes spanning T1–T4, TWA-Y Series capacitors deliver high reliability, high temperature, and long lifetime performance, and exhibit stable electrical parameters over temperature (-55C to +200C). Hermetically sealed in a welded tantalum can and header assembly, TWA-Y Series capacitors also satisfy the harsh mechanical shock and high frequency vibration requirements for MIL-STD-202 method 204, test condition 'D' and method 213, test condition 'I', making them ideal for input and output filtering and energy storage and discharge in high temperature avionics, industrial, and down-hole applications. “Wet tantalum capacitors are ideal for input and output filtering due to their high ripple current capabilities and for energy storage and discharge due to their high bulk capacitance and low ESR,” said Allen Mayar, product marketing manager, AVX. “Expanding the capacitance and voltage values for our high temperature, wet tantalum TWA-Y Series, which features several components rated for 2,000-hour lifetimes at 200°C operating temperatures, provides design engineers with a wide array of robust, high performance, high reliability components that will prove critical for developing the next generation of harsh environment applications.” The still-expanding TWA-Y Series is currently rated for capacitance values spanning 68–1,000µF with a ±10% or ±20% capacitance tolerance, rated voltages spanning 50V – 125V, and temperatures spanning -55C to +200C. However, several additional components that will eventually extend the series from 10–1,000µF and 25–125V are in active development, says the company.