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Vishay Polyester Capacitors - 225P Series

Part Number Information
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225P-2

Performance Characteristics

  • Operating Temperature: - 55 °C to + 85 °C
      To + 105 °C when working voltage is reduced to 70 % of + 85 °C rating
      To + 125 °C when working voltage is reduced to 50 % of 85 °C rating
  • Insulation Resistance: After a 2 minute charge at rated voltage or 500 V, whichever is less.
      At + 25 °C: 100 000 Megohm for C ≤ 0.25 Microfarads 25000 Megohm - Microfarads for C > 0.25 Microfarads
      At + 85 °C: 10 000 Megohm for C ≤ 0.15 Microfarads 1500 Megohm - Microfarads for C > 0.15 Microfarads
      At + 105 °C: 1500 Megohm for C ≤ 0.17 Microfarads 250 Megohm - Microfarads for C > 0.17 Microfarads
      At + 125 °C: 200 Megohm for C ≤ 0.13 Microfarads 25 Megohm - Microfarads for C > 0.13 Microfarads

Capacitance Tolerance and Dissipation Factor:
Capacitors shall be measured at a frequency of 1000 Hz at + 25 °C or else be referred to measurements made at that frequency and temperature. The maximum dissipation factor shall be 0.75 %

Dielectric Withstanding Voltage:
Capacitors shall withstand a DC potential of 250 % of rated voltage applied between terminals for not more than 5 seconds. The test voltage must be applied and discharged through a resistor of 1 ohm per volt.

Humidity Test:
Condition capacitors with no voltage applied for 72 hours at 95 % relative humidity and + 75 °C. Remove capacitors from humidity chamber, wipe surface dry of moisture and dry in circulating air for 4 hours. Measure insulation resistance after a 2 minute charge at 25 °C and rated voltage or 500 VDC, whichever is less. Minimum product of insulation resistance and capacitance shall be 5000 Megohm - Microfarads after test but need not exceed 10 000 Megohm. Not more than one failure allowed in 12 units tested.

DC Life Test:
Capacitance are capable of withstanding a 500 hour life test at + 85 °C at 150 % of rated working voltage. After test, capacitance shall not have changed by more than 5 % of initial value, insulation resistance shall not have decreased by more than 50 % of the initial limit and dissipation factor shall not have increased to more than 1 %.

Features & Benefits:

  • Utilizes minimum area where printed wiring board space is most important
  • Wound from PETP polyester film and thin gauge foil under carefully controlled atmospheric conditions
  • Protected against moisture by a conformal coating of epoxy
  • Specifically designed for printed wiring board applications
  • Widely used in computers, instrumentation and telecommunications equipment
  • 100 VDC through 600 VDC, may be operated up to + 125 °C with proper derating