CMR03E220DOCR

Series:	CMR
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Capacitance:	22pF
Tolerance:	±0.5pF
Voltage - Rated:	300V
Dielectric Material:	Mica
Operating Temperature:	-55°C ~ 125°C
Mounting Type:	Through Hole
Package / Case:	Radial
Lead Spacing:	0.118" (3.00mm)
Features:	General Purpose
Size / Dimension:	0.272" L x 0.118" W (6.90mm x 3.00mm)
Height - Seated (Max):	0.201" (5.10mm)

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Mica and PTFE Capacitors

Mica and PTFE capacitors are widely used components in the construction of electrical circuits and equipment, from both a structural and a functional perspective. They combine a number of desirable characteristics, which make them suitable for a variety of applications. The CMR03E220DOCR is one such component, widely used in capacitance couple protection and signal conditioning applications.

Structure

At the core of the CMR03E220DOCR is a combination of materials that provide the necessary tolerance to voltage and frequency changes. The core consists of mica, thinly deposited with metal (typically aluminum or palladium) on both sides and then topped off with a thin film of polytetrafluoroethylene (PTFE). This design provides a robust capacitor structure with a wide range of available capacitance values and improved dielectric properties. This combination of materials also results in a glass-like, low-dielectric capacitance, which provides excellent performance and stability over a wide temperature range.

Function

The CMR03E220DOCR functions as both a filter and a bypass capacitor, providing signal conditioning and attenuation for both AC and DC signals. It is designed to reduce noise and control current flow between two nodes, providing improved signal quality and system reliability. The dielectric properties of the mica and PTFE provides excellent tolerance to voltage changes and spikes, allowing the CMR03E220DOCR to effectively protect power supplies from these events. Additionally, the low dielectric constant of the capacitor allows for minimal interference with the signal, providing superior signal integrity.

Application

The CMR03E220DOCR is typically used in protection circuits, signal conditioning, and EMI and RFI shielding. Protection circuits employ the use of the CMR03E220DOCR for attenuation of voltage spikes and power surges, and to protect components from unnecessary wear and damage due to electrical faults. The capacitor is also used in signal conditioning applications to smooth out DC signals and reduce noise, enabling accurate sensing and measurement. Lastly, the CMR03E220DOCR can be used as part of an EMI/RFI shield, providing an additional layer of protection from electromagnetic interference.

Conclusion

The CMR03E220DOCR is a robust capacitor, combining mica and PTFE to provide excellent tolerance to temperature changes and voltage fluctuations. It is a common component in protection circuits, signal conditioning, and EMI/RFI shielding, offering superior signal integrity and reliability. As such, the CMR03E220DOCR is a highly beneficial component for design engineers constructing electrical circuits and systems.

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