Vishay has introduced a new series of automotive-grade vPolyTan™ surface-mount polymer tantalum chip capacitors which offer improved performance at high temperatures and in high humidity.
The Vishay T51 series offers lower ESR and lower voltage derating than traditional tantalum capacitors, while offering higher capacitance values as a function of package size. These features also make the T51 series more attractive than multi-layer ceramic chip capacitors or aluminum capacitors of a similar capacitance. The T51 capacitors are ideal for decoupling, smoothing, and filtering functions in automotive switch-mode and point-of-load power supplies.
The T51 capacitors are supplied in the compact D (EIA 7343-31) and V (EIA 7343-20) case sizes, with capacitance values ranging from 6.8 µF to 330 µF over voltage ratings ranging from 2.5 V up to 35 V. Capacitance tolerance is 20%.
Featuring a highly conductive polymer cathode system, the capacitors provide low ESR of as little as 40 mΩ at 25°C.
Tolerant of harsh environments, the T51 capacitors can operate at temperatures up to 125°C, with voltage derating above 105°C. The devices are rated for a high-temperature load time of 2,000 hours.
Vishay supplies a wide range of other vPolyTan surface-mount polymer tantalum chip capacitors. These include the T55 products, which are notable for their low ESR, resulting in a lower voltage drop and better frequency response.
The T59 capacitors are available with capacitance ranging from 15 μF to 470 μF. These capacitors offer a high ripple-current capability, and stable capacitance over operating temperature, voltage, and frequency range.
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