CMR04C4R5DODR

Series:	CMR
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Capacitance:	4.5pF
Tolerance:	±0.5pF
Voltage - Rated:	500V
Dielectric Material:	Mica
Operating Temperature:	-55°C ~ 125°C
Mounting Type:	Through Hole
Package / Case:	Radial
Lead Spacing:	0.150" (3.80mm)
Features:	General Purpose
Size / Dimension:	0.358" L x 0.189" W (9.10mm x 4.80mm)
Height - Seated (Max):	0.331" (8.40mm)

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Mica and PTFE Capacitors

Mica and PTFE capacitors are amongst the most reliable and stable ones that exist, owing to their unique physical properties. This article will focus on the CMR04C4R5DODR application field and working principle. Mica capacitors are a type of fixed capacitors that use mica as a dielectric material and are encased in metal cases to form a vacuum-tight seal. Mica is chosen due to its naturally occurring ruts in the crystalline lattice, which makes it an excellent electrical insulator. This, coupled with its chemically inert characteristics and its low coefficient of thermal expansion, makes it an excellent choice for electrical applications requiring a dielectric material.The CMR04C4R5DODR model of mica capacitor is designed for use in applications that require large capacitance values, such as filtering, electrical storage, and buffering. This mica capacitor is a high-voltage model and can operate at voltages up to 500 V, making it suitable for use in power supplies and other high-voltage applications. Furthermore, its high-temperature coefficient makes it an ideal choice for high-temperature environments. The working principle of mica capacitors lies in the properties of mica itself. As discussed above, mica is an excellent electrical insulator, a proficient dielectric material, and has a highly stable temperature coefficient. All these characteristics make it ideal for many applications requiring the use of a capacitor. When voltage is applied to the mica capacitor, the electric field produced by the input voltage distorts the electron’s orbitals of the mica crystal. This results in the buildup of electrons on one side of the capacitor and a corresponding depletion of electrons on the other side. This causes an electrostatic force that creates a positive and negative field within the dielectric material. As a result, the dielectric keeps its current position between the plates.PTFE capacitors are similar to mica capacitors in many ways, but differ in their use of polytetrafluoroethylene (PTFE) as the dielectric material. The main advantage of using PTFE is its very low linear temperature coefficient and excellent dielectric properties, making it an excellent choice for use in very high temperature and very high frequency applications.The CMR04C4R5DODR model is a type of PTFE capacitor that is designed to withstand high temperatures and high voltages, while providing excellent capacitance values. It is constructed using two sheets of PTFE that are separated by a thin layer of metal film, acting as the electrodes. These films are then encapsulated in a vacuum-sealed stainless steel container.This design helps provide excellent dielectric strength, enabling the capacitor to operate at voltages up to 500 V. Additionally, its low linear temperature coefficient helps maintain great capacitance values across a wide temperature range. The working principle of PTFE capacitors is similar to that of mica capacitors. When voltage is applied to the capacitor, the electric field created distorts the electron’s orbitals of the PTFE material. This creates a positive and negative field within the PTFE dielectric material, leading to electrostatic force that keeps it in its current position between the plates. In conclusion, the CMR04C4R5DODR model of mica and PTFE capacitors are both excellent choices for applications that require a reliable and stable capacitor that can withstand high temperatures and high voltages. Their use of mica and PTFE dielectrics gives them excellent dielectric properties to help promote better performance, while their low linear temperature coefficient helps maintain good capacitance values over a wide temperature range.

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