Series:	CD4
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Capacitance:	390pF
Tolerance:	±5%
Voltage - Rated:	500V
Dielectric Material:	Mica
Operating Temperature:	-55°C ~ 125°C
Mounting Type:	Through Hole
Package / Case:	Radial
Lead Spacing:	0.098" (2.50mm)
Features:	RF, High Frequency
Size / Dimension:	0.339" L x 0.161" W (8.60mm x 4.10mm)
Height - Seated (Max):	0.311" (7.90mm)

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Mica and PTFE Capacitors

The CD4FD391JO3 is one of the most common types of mica and PTFE capacitors used in various electrical and electronic applications. A mica and PTFE capacitor is a type of capacitor that consists of mica as the dielectric between two electrodes of metal or metallized foil. It is an energy storage device used primarily to store electricity through electrostatic induction. The PTFE is used as a coating material to protect the surface of the mica from dirt, dust, and chemical contamination. The CD4FD391JO3 is a two-part capacitor made up of two identical parts; one part consists of mica, while the other part is made up of PTFE. The two parts are connected together in a die-cut configuration by means of an epoxy and mounted onto a substrate. The CD4FD391JO3 typically has a capacitance range of 0.1 to 4.7 microfarads. It also provides excellent dielectric stability and low inductance, making it suitable for use in applications such as signal processing, power conditioning and filtering. The CD4FD391JO3 has numerous applications in a variety of industries. In telecommunications, it can be used as a DC blocking capacitor for extracting data signals from a high speed analog signal. It can also be used as a coupling capacitor in switched-mode power supplies, as a noise-reduction component in systems such as an oscillator, and in radio frequency applications.The CD4FD391JO3 capacitor can also be used in signal conditioning or mixing applications where the electrical characteristics need to be adjusted or corrected. Due to its wide range of capacitance values, it can be used as a series or parallel component in circuits requiring variable capacitance values.The working principle of the CD4FD391JO3 capacitor is very simple. The capacitor is made up of two electrodes, a positive and a negative, which are connected to a substrate by means of an epoxy. When a voltage is applied between the two electrodes, electrons flow from the positive electrode to the negative electrode and a charge builds up inside the capacitor. This charge creates an electrostatic field between the two electrodes, which allows the capacitor to store and release energy.The CD4FD391JO3 mica and PTFE capacitor is a reliable, efficient and cost-effective component that has almost unlimited applications. It can be used in a variety of applications including telecommunications, signal conditioning, power conditioning, and other electronic applications. The capacitor’s numerous advantages make it an invaluable tool in the world of electronics.

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