CD18FD681JO3F

Series:	CD18
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Capacitance:	680pF
Tolerance:	±5%
Voltage - Rated:	500V
Dielectric Material:	Mica
Operating Temperature:	-55°C ~ 150°C
Mounting Type:	Through Hole
Package / Case:	Radial
Lead Spacing:	0.343" (8.70mm)
Features:	RF, High Q, Low Loss
Size / Dimension:	0.650" L x 0.209" W (16.50mm x 5.30mm)
Height - Seated (Max):	0.512" (13.00mm)

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Mica and PTFE Capacitors Mica and PTFE capacitors areelectronic components used in machine products,equipmentand systems for different applications. These materials can be used for a wide range of voltage and capacitance levels. Mica is one of the oldest and most reliablecapacitor materials whilePTFE has emerged as a relatively new and cost-effective capacitor. CD18FD681JO3F is a special type of Mica and PTFE capacitor which consists of two terminals and one dielectric layer. This type of capacitor is designed to provide higher capacitance values with a small form factor. It is also used as ahigh-voltage capacitor due to its high breakdown voltage. Application Field CD18FD681JO3F is mainly used in the broadcast and communication industries. It can be applied for antenna radiations, oscillation circuits, coupling circuits, impedance matching, voltage dividers and coupling capacitor applications. This capacitor is also used in power converters, mobile base stations, and industrial control systems. Moreover, it can be utilized in high voltage AC/DC converters, broadcast and communication transceivers, and feedback circuits. Working Principle The working principle of the CD18FD681JO3F is based on the capacitance of the dielectric material. As voltage is applied across the capacitor, then electromotive forces will be generated in the capacitor conductor plates. These thermoelectric forces result in a build-up of electric charge over the dielectric material between the capacitor plates. The electric charge buildup will result in the electric field which interacts with the capacitance of the dielectric material. The dielectric material will then act as an insulator, allowing the electric field to travel between the capacitor plates. Thus, the result of this interaction is the buildup of capacitance. The capacitance of a CD18FD681JO3F capacitor will vary depending on various factors such as the material used as the dielectric. The capacitance will increase with the increase of the dielectric material’s permittivity. This type of capacitor is also useful as a buffer capacitor since it can provide an adjustable level of capacitance by varying the applied voltage. The CD18FD681JO3F capacitor can support higher voltage levels compared to other types of capacitors. This characteristic is due to its dielectric material which has an exceptional high breakdown voltage. The breakdown voltage determines the maximum voltage that the capacitor is able to withstand. For the CD18FD681JO3F, it has a typical breakdown voltage of 18kV. Conclusion The CD18FD681JO3F capacitor is a Mica and PTFE capacitor which provides high capacitance values in a small form factor. It is primarily used in the broadcast and communication industries for tasks such as coupling circuits and impedance matching. This capacitor is also advantageous because of its high breakdown voltage of 18kV which makes it suitable for higher voltage applications. Furthermore, its dielectric material has the ability to adjust the capacitance value of the device via varying the applied voltage.

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