CMR05C4R5DPDP

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 ~ 150°C
Mounting Type:	Through Hole
Package / Case:	Radial
Lead Spacing:	0.224" (5.70mm)
Features:	General Purpose
Size / Dimension:	0.449" L x 0.169" W (11.40mm x 4.30mm)
Height - Seated (Max):	0.358" (9.10mm)

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MAIN:Mica and PTFE capacitors are a type of capacitor that is composed of two outer layers of molten or fine mica, separated by a thin layer of PTFE (polytetrafluoroethylene). Unlike traditional capacitors, these capacitors are highly resistant to dielectric losses, making them ideal for use in applications where high-quality, stable performance is essential. The combination of mica and PTFE in a unique configuration allows for very high capacitance values with relatively low ESR and stable capacitance over a wide range of temperature and frequency.CMR05C4R5DPDP application field and working principle:CMR05C4R5DPDP is specifically designed as a high-performance replacement for film capacitors in very high frequency switching power supply applications. It has a wide operating temperature range from -55°C to +125°C, impressive capacitance stability (1.2% or less deviation over temperature) and a low ESR of just 6mOhms at 500kHz.As a result, this mica-PTFE capacitor offers very high capacitance and low ESR in combination with wide operating temperature range, making it ideal for very high-frequency switching power supply applications.The CMR05C4R5DPDP has an excellent self-healing property, which eliminates the possibility of short-circuiting due to mechanical or thermal shock, enabling the capacitor to maintain its electrical integrity over time. The outstanding dielectric and environmental properties of this mica-PTFE material also make it suitable for use in applications that require very high reliability, such as medical electronics or aerospace.In terms of working principle, mica and PTFE capacitors have a unique construction that offers both insulation and capacitance. The two layers of mica act as an insulative layer, preventing any electrical charge from escaping or being transferred between the two plate electrodes. The PTFE layer acts as a dielectric, allowing an electric field to be created and stored between the layer of mica and the plates. This stored electric charge creates a capacitance which can then be used to feed current into a circuit for an application.Overall, mica and PTFE capacitors are a great choice for applications that require very high capacitance values and very low ESR, as well as high reliability. The CMR05C4R5DPDP is the perfect example of such a capacitor, and its unique construction and high-performance make it a great choice for very high-frequency, switching power supply applications.

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