IET SCA Series Capacitance Standards

  • Values from 1 pF to 10,000 µF in any custom value available
  • Stability as good as ±0.01 %/year
  • Two-to-five terminal configuration, depending on model
  • Excellent TC: as low as 10 ppm/°C
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IET SCA Series Capacitance Standards

The IET SCA Series Capacitance Standards are very stable cost-effective capacitance standards with a low temperature coefficient, low losses and a wide range of values from 1 pF to 10,000 uF. The cost and flexibility make this our most popular capacitance standard.

From 1 pF to 10 pF: these are made of precision air capacitors. Up to 1 uF, the standard capacitors are made of solid mica capacitors with very high stability to be used as a two or three terminal reference or as a working standard in the laboratory. Above 1 uF they are made with hermetically sealed polypropylene sulphide.

Typical capacitors, which have been observed for decades, have shown random fluctuations of less than + 0.01% in measured capacity with no evidence of systemic drift.

IET SCA Models

Nominal value Model Adjustment Temperature coefficient Dissipation (typical) Stability (per year) Max voltage
to nominal (ppm/°C) Peak (V) Max Frequency
 1 pF  SCA-1pF  ±0.1 pF + 20 to +40  0.002 ± 0.1 pF 500 1 0 kHz
 1.9 pF  SCA-1.9pF  ±0.1 pF + 20 to +40  0.002 ± 0.1 pF 500 1 0 kHz
 10 pF  SCA-10pF  ±0.1 pF + 20 to +40  0.002 ± 0.1 pF 500 1 0 kHz
 19 pF  SCA-19pF  ±0.1 pF + 20 to +40  0.001 ± 0.1 pF 500 1 0 kHz
 100 pF  SCA-100pF  ±0.1 pF 20  0.0005  ±0.1 pF 5 00  10 kHz
 190 pF  SCA-190pF  ±0.1 pF 20  0.0005  ±0.1 pF 5 00  10 kHz
 1.0 nF  SCA-1nF  ±0.02% 20  0.0003 ± 100 ppm 500 1 0 kHz
 1.9 nF  SCA-1.9nF  ±0.02% 20  0.0003 ± 100 ppm 500 1 0 kHz
 10 nF  SCA-10nF  ±0.02% 20  0.0003 ± 100 ppm 500 1 0 kHz
 19 nF  SCA-19nF  ±0.02% 20  0.0003 ± 100 ppm 500 1 0 kHz
 100 nF  SCA-100nF  ±0.02% 20  0.0003 ± 100 ppm 500 1 0 kHz
 190 nF  SCA-190nF  ±0.02% 20  0.0003 ± 100 ppm 500 1 0 kHz
 1 µF  SCA-1µF  ±0.02% 20  0.0002 ± 100 ppm 500 1 0 kHz
 1.9 µF  SCA-1.9µF  ±0.02% 20  0.0002 ± 100 ppm 100 1 0 kHz
 5 µF  SCA-5µF  ±0.02% ± 50  0.0005 ± 200 ppm 100 1 0 kHz
 10 µF  SCA-10µF  ±0.04% ± 50  0.0005 ± 200 ppm  22 Vrms†  1 kHz
 19 µF  SCA-19µF  ±0.04% ± 50  0.0005 ± 200 ppm  44 Vrms†  1 kHz
 100 µF  SCA-100µF  ±0.05% ± 50  0.001  ±500 ppm  22 Vrms†  1 kHz
 190 µF  SCA-190µF  ±0.05% ± 50  0.001  ±500 ppm  22 Vrms†  1 kHz
 1,000 µF  SCA-1000µF  ±0.4% -150  0.001  ±500 ppm  22 Vrms†  1 kHz
 5,000 µF  SCA-5000µF  ±2% -150  0.001  — 2 2 Vrms†  1 kHz
 10,000 µF  SCA-10000µF  ±2% -150  0.001 – –  22 Vrms†  1 kHz
 XXX F  SCA-XXX  customer-selected value and power specifi cations

 

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