CMR04F910JODM

Mica and PTFE Capacitors

The CMR04F910JODM is a type of capacitor from the Mica and PTFE Capacitors group, which are known as ‘Polymica’ capacitors, because they have a mica core with a polytetrafluoroethylene (PTFE) dielectric. The CMR04F910JODM is a SMT capacitor which has a capacitance range of 1nF up to 4.7nF and suitable for use with 50V dc and 120V ac..

Application Field

The CMR04F910JODM is ideal for use in applications such as automatic test equipment (ATEs), filter and snubber circuits in voltage converters, high-frequency converters, and power-supply applications.

These capacitors are also suitable for use in RF, microwave, high-frequency switching power supplies, and traction inverters. They are used in high-frequency pulse circuits, in high-power amplifiers, and as signal interference filters. They can also be used to construct base-station antenna systems.

Working Principle

The CMR04F910JODM consists of two metal plates that are separated by a mica core. The two plates are connected to an external circuit and are insulated from each other by a PTFE dielectric. When a voltage difference is applied across the two plates, an electric field is created between the plates. This creates an electric charge on each plate which is stored as an electric field. This stored energy is known as the capacitance of the capacitor.

When alternating current flows through the two plates, the magnetic field created by the current interacts with the electric field, resulting in a current flow between the two plates. This current flow is known as an ‘eddy current’ and causes losses in the electric field. The higher the frequency of the alternating current, the greater the losses, resulting in lower capacitance.

The PTFE insulation ensures that the electric field between the plates remains constant even when the frequency of the alternating current changes. The mica core also helps to reduce losses and improve capacitance. Thanks to these two properties, the CMR04F910JODM is highly efficient and reliable.

Conclusion

The CMR04F910JODM is a type of capacitor from the Mica and PTFE Capacitors group. It has a capacitance range of 1nF up to 4.7nF and suitable for use with 50V dc and 120V ac. It is ideal for use in automatic test equipment (ATEs), filter and snubber circuits in voltage converters, high-frequency converters, and power-supply applications. The two plates are connected to an external circuit and are insulated from each other by a PTFE dielectric, and the mica core ensures a constant electric field between the plates. Thanks to these two properties, the CMR04F910JODM is highly efficient and reliable.