Series:	CDV30
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Capacitance:	120pF
Tolerance:	±5%
Voltage - Rated:	2.5kV
Dielectric Material:	Mica
Operating Temperature:	-55°C ~ 125°C
Mounting Type:	Through Hole
Package / Case:	Radial
Lead Spacing:	0.438" (11.10mm)
Features:	General Purpose
Size / Dimension:	0.780" L x 0.250" W (19.80mm x 6.40mm)
Height - Seated (Max):	0.858" (21.80mm)

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Mica and PTFE Capacitors

CDV30FK121JO3F application field and working principle

Mica and PTFE capacitors are one of the most popular types of capacitor, offering high capacitance and low losses. CDV30FK121JO3F is a kind of capacitor developed by Cornell Dubilier, and it is widely used in some specific applications. This article will focus on the application fields and working principle of this type of capacitor.

Application Fields

CDV30FK121JO3F capacitors are used in a variety of applications, including power electronics, communications systems, audio systems, medical electronics, instrumentation, and industrial controls. In power electronics, they are used in high voltage applications and inverters. In communications systems, they are used as dc reactors, snubber networks, EMI filters, and high frequency harmonic filters. In audio systems, they are used as snubber networks, EMI suppression, and crossover networks. In medical electronics, they are used in equipment that requires a high degree of surge immunity. In instruments and industrial controls, they are used to reduce switching noise, provide high voltage grounding, reduce conducted emissions, and provide low voltage grounding.

Working Principle

The working principle of CDV30FK121JO3F capacitors is based on a dielectric layer of PTFE (polytetrafluoroethylene) between two layers of mica tape. The PTFE layer acts as an insulator between the two mica tapes, which form the capacitance. As current passes through the dielectric layer, the electrical charge is stored. The thicker the dielectric layer, the higher the capacitance.The capacitance of CDV30FK121JO3F capacitors is also affected by their construction. The components are constructed with an enclosed box-like metal enclosure with two top ports. This enclosure reduces the amount of air around the dielectric layer, thus reducing leakage. It also increases the resistance of the capacitors, increasing their lifetime.The overall quality of CDV30FK121JO3F capacitors is high due to the materials used in their construction. The mica and PTFE combination provides excellent dielectric strength, reducing the amount of power that can be lost during switching. Additionally, the PTFE layer provides excellent temperature stability, ensuring that the capacitors work correctly in harsh environments.In conclusion, CDV30FK121JO3F capacitors are a high quality product that is best suited for applications such as power electronics, communications systems, audio systems, medical electronics, instrumentation, and industrial controls. They are able to withstand high voltages and provide excellent temperature stability. Furthermore, their box-like enclosure reduces leakage and increases the capacitors\' lifetime.

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