CDS15FD241GO3

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Mica and PTFE capacitors, such as the CDS15FD241GO3, are non-polarized, dielectric, variable capacitors used as tuning devices in radios, televisions, radar, and other electronic circuits. They are well-suited for applications requiring high stability, high voltage, and low loss factors. In this article, we will discuss the application field and working principle of the CDS15FD241GO3.

The CDS15FD241GO3 is a mica capacitor used in television broadcast and FM radio antenna tuners, as well as in UHF and VHF tuners for close tuning and high Q applications. The tuning adjustment is accomplished by means of a metal screw attached to the outside of the capacitor body, creating a variable capacitance divided evenly between two or more sections. When the screw is turned, the capacitance is changed as the mica discs move closer together or farther apart. The CDS15FD241GO3 is designed to tolerate a wide range of frequencies and temperatures, and offers excellent broadcast band frequency stability over its entire range of adjustment.

The CDS15FD241GO3 is made of a combination of mica and polytetrafluoroethylene (PTFE). The mica acts as the dielectric, or insulation between the plates of the capacitor. The PTFE serves as the dielectric between the outside of the capacitor and the metal screw and provides static protection for the mica discs. The PTFE layer also protects the mica discs from corrosion and other environmental hazards that could potentially degrade their performance.

The metal screw acts as the tuner. When the screw is turned, its motion is transferred to the mica discs, which move in response to the pressure. This movement results in a change in the gap between the mica discs, causing the capacitance to increase or decrease. The tuning range of the CDS15FD241GO3 is 30 pF to 800 pF with a voltage rating of 1000 VDC.

The CDS15FD241GO3 also offers reliable temperature stability and low loss characteristics due to the combination of mica and PTFE. The dielectric constant of the mica remains nearly constant over the temperature range of -55°C to 125°C, while the PTFE protects the mica from moisture and other environmental hazards that could reduce its performance. In addition, the PTFE provides a low dielectric loss factor, reducing the insertion loss of the capacitor.

In summary, the CDS15FD241GO3 is a mica and PTFE capacitor used in television broadcast and FM radio antenna tuners, as well as in UHF and VHF tuners for close tuning and high Q applications. It is designed to tolerate a wide range of frequencies and temperatures, and offers excellent broadcast band frequency stability over its entire range of adjustment. The tuning is accomplished by means of a metal screw attached to the outside of the capacitor body. The combination of mica and PTFE also provides reliable temperature stability and low loss characteristics, making the CDS15FD241GO3 a reliable and versatile choice for many applications.

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