High-Voltage Polymer Tantalum SMT Capacitors - T521 Series

KEMET organic polymer capacitors (KO-CAP) deliver high-voltage options for input power rails

Image of KEMET T521 Series High Voltage Polymer Capacitors KEMET T521 series high-voltage polymer capacitors are designed for input applications such as 12 V, 24 V, and 48 V power rails. This series demonstrates excellent high-voltage handling capabilities and is used as a replacement for other high-capacitance components such as traditional MnO2 tantalum and aluminum electrolytic capacitors.

The use of tantalum anode provides a high-energy density capacitor solution, revealing capacitance stability with voltage, temperature range, and lifespan. The polymer cathode system allows for extremely low ESR, high ripple current handling, and a safe failure mode.

The T521 series can be safely operated for continuous duty at 90% of the rated voltage and can withstand transient conditions up to the rated voltage of the component. This series is ideally suited for high-efficiency power supplies, high-reliability applications, space- or weight-restricted applications, outdoor environments, and any other application that desires a compact design, high performance, and long life expectancy.

Features
  • Voltage ratings of 2 V to 75 V
  • High volumetric efficiency
  • Stable temperature characteristics
  • 0.68 µF up to 1500 µF capacitance values
  • High ripple current capability
  • Low ESR down to 4 mΩ
  • High reliability
  • 100% surge current tested
  • Low-profile design
  • Benign failure mode
  • Pb-free when ordered with termination: 100% Sn, Ni-Pd-Au, or non-magnetic 100% Sn solder
  • RoHS compliant and halogen-free

White paper: Polymer technology for high-power GaN-based smart chargers

KO-CAP® T521 Series Capacitors

ImageManufacturer Part NumberDescriptionVoltage - RatedAvailable QuantityPrice
CAP TANT POLY 330UF 16V 2917T521X337M016ATE025CAP TANT POLY 330UF 16V 291716 V0 - Immediate$29.39View Details
CAP TANT POLY 220UF 16V 2917T521X227M016ATE035CAP TANT POLY 220UF 16V 291716 V7855 - Immediate$16.96View Details
CAP TANT POLY 100UF 25V 2917T521X107M025ATE060CAP TANT POLY 100UF 25V 291725 V32914 - Immediate$21.22View Details
CAP TANT POLY 100UF 16V 2917T521V107M016ATE050CAP TANT POLY 100UF 16V 291716 V0 - Immediate$9.98View Details
CAP TANT POLY 33UF 35V 2917T521D336M035ATE065CAP TANT POLY 33UF 35V 291735 V0 - Immediate$15.28View Details

T521 Series Capacitors

ImageManufacturer Part NumberDescriptionVoltage - RatedAvailable QuantityPriceView Details
CAP ALUM POLY 47UF 20% 25V SMDT521V476M025ATE040CAP ALUM POLY 47UF 20% 25V SMD25 V813 - Immediate$8.99View Details
New at DigiKey
CAP TANT POLY 33UF 20V 70MOHM
T521B336M020ATE070CAP TANT POLY 33UF 20V 70MOHM20 V1732 - Immediate$5.59View Details
New at DigiKey
CAP TANT POLY 68UF 25V 100MOHM
T521V686M025ATE050CAP TANT POLY 68UF 25V 100MOHM25 V690 - Immediate$9.04View Details
Updated: 2026-01-12
Published: 2015-02-26