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New Aluminum Electrolytic Capacitors Power Ultra High Ripple Current Snap-In for Solar PV Inverters

193 PUR-SI Solar Series
193 PUR-SI Solar Series

Vishay Intertechnology, Inc. has announced that it has upgraded its 193 PUR-SI Solar series of snap-in power aluminum capacitors with a higher rated voltage of 570 V and a category voltage of 475 V. Targeted at solar applications, these new devices offer operation up to 600 V at specific conditions, long useful life, and high rated ripple current up to 2.46 A at + 105 °C and 100 Hz. With their ability to fulfill the open-circuit voltage condition up to 600 V, these components lower the overall cost of solar PV inverters by reducing the number of electrolytic capacitors required, allowing designers to use one capacitor for string input voltages of 600 V and two for 1200 V.


Featuring a cylindrical aluminum case with a pressure relief valve, insulated with a blue sleeve, 193 PUR-SI Solar series capacitors are available in five case sizes ranging from 35 mm by 30 mm to 35 mm by 60 mm. At 570 V, enhanced 193 PUR-SI Solar series devices feature a maximum operating temperature to +60 °C and endurance of 5000 hours (no ripple current applied) and at 475 V, the maximum temperature can be extended to +105 °C and the useful life is 6000 hours. As polarized aluminum electrolytic capacitors with a non-solid electrolyte, these RoHS-compliant devices are ideally suited for DC-Link buffering and filtering applications.



  • Tailored design for solar PV inverters

  • Specified for higher voltage, up to 600 V at specific operation conditions

  • Long useful life: 6000 h at +105 °C

  • High ripple current capability

  • High reliability



  • Solar PV inverters

  • Industrial motor control

  • Power supply



Production quantities of the upgraded 193 PUR-SI Solar series capacitors are now available with lead times of 19 to 21 weeks.

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