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Wet tantalum capacitors offer high ripple current

Posted: 27 Apr 2009 ?? ?Print Version ?Bookmark and Share

Keywords:ceramic capacitor wet? ripple current high? electrolytic device?

Vishay Intertechnology Inc. has introduced two wet tantalum capacitors claimed to be the first of such devices to be offered in a true surface-mountable molded package.

According to Vishay, the M34 and M35 wet tantalum electrolytic chip capacitors incorporate the advantages of all varieties of electrolytic capacitors and eliminate most of the disadvantages. The devices have a higher ripple current capability compared with other electrolytic type with similar combinations of capacitance and case size, the company said. In addition, the M35 features a 3V reverse voltage capability at + 85 C.

Optimized for power supplies in all avionics, military and space applications that currently use Vishay's ST -T1 (M34) or 135D- C/T1 (M35) case ratings, the devices' new surface-mountable case allows designers to eliminate the last through-hole component on their PCB, reducing overall PCB assembly cost.

With a wide capacitance range of 10?F at 125 V to 120?F at 25 V for the M34, and 1.7?F at 125V to 220?F at 6V for the M35, the devices feature all industry-standard T1 wet tantalum ratings. The capacitors offer tin/lead or 100 percent tin (RoHS complaint) terminations.

The M34 and M35 operate over a temperature range of -55C to + 85C, and up to + 125C with voltage derating. The devices offer a 20 percent standard capacitance tolerance at 120 Hz and + 25C, with tolerances of 5 percent and 10 percent also available.

Pricing for U.S. delivery is $41.15 each for the M34, and $29.10 each for the M35. Samples and production quantities are available now, with lead times of approximately 20 weeks for larger orders.

- Ismini Scouras

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