GenRad 1403-A High Frequency Standard Capacitor

  • Available in values from 0.001 pF - 1000 pF
  • Excellent Performance at high frequencies
  • ISO-17025 Accredited Calibration Included with the Standard

Consult IET Labs, Inc for pricing information
Priced at

The GenRad 1403 Standard Air Capacitors are stable, three-terminal standards in decimal values from 0.001 pF to 1000 pF. For measurement at 100 pF and below, a three terminal connection increases the accuracy by eliminating the uncertainty in the measurement introduced by the capacitances between the capacitor terminals and ground. The GenRad 1403 terminals are arranged to plug directly into the unknown terminals of the GenRad 1615-A Capacitance Bridge

Dielectric losses are not detectable; there is no solid dielectric in the direct-capacitance field. All have shielded terminals, both of which are insulated from the case.


A certificate of calibration is supplied with each unit giving the measured capacitance at 1 kc/s and at a specified temperature. The measured value is the direct capacitance between shielded terminals when the capacitor has at least one lead completely shielded and its case connected to a guard point.
This value is obtained by comparison, to a precision better than ±(0.01% + 0.00001 pF), with working standards whose absolute values are known to an accuracy typically ±0.01%, determined and maintained in terms of reference standards periodically certified at NIST

Stability: Capacitance change is less than 0.05% per year.

Temperature Coefficient of Direct Capacitance: Typically 20 to 40 ppm per degree between 20° and 70°C. The larger coefficients apply to the smaller capacitance values.

Terminals: GR874 Coaxial Connectors, which provide complete shielding of the leads.