MCHN38FM390J-Y

Series:	MCHN
Packaging:	Tray
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Capacitance:	39pF
Tolerance:	±5%
Voltage - Rated:	4kV
Dielectric Material:	Mica
Operating Temperature:	-55°C ~ 125°C
Mounting Type:	Surface Mount
Package / Case:	Nonstandard SMD
Lead Spacing:	--
Features:	RF, High Q, Low Loss
Size / Dimension:	0.380" L x 0.380" W (9.65mm x 9.65mm)
Height - Seated (Max):	0.120" (3.05mm)

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Mica and PTFE Capacitors

Mica and PTFE capacitors, such as the MCHN38FM390J-Y, offer a space-saving, high capacitance, low-resistance solution for many electrical and electronic applications. The construction of these capacitors achieves a low impedance, high reliability, and wide frequency response.

What are Mica and PTFE Capacitors?

Mica and PTFE capacitors are made up of two ceramic discs insulated with a thin layer of PTFE. These discs are then trimmed to a specific thickness and size before being sandwiched together and cured in an oven. The result is an extremely high capacitance and low effective series resistance (ESR) at high frequencies.

Application Field of MCHN38FM390J-Y

The MCHN38FM390J-Y is a type of mica and PTFE capacitor, specifically designed for RF applications. It typically has a capacitance of 390pF and a maximum working voltage of 100V DC. Due to its high capacitance and low inductance, it is often used in applications where DC filtering, decoupling, and isolation are required. It is also well suited for RFI and EMI suppressors, as it can effectively reduce emission levels to meet various regulations.

Working Principle of MCHN38FM390J-Y

The MCHN38FM390J-Y capacitor works using the principle of electrochemical insulation. This means that the dielectric material used - PTFE - acts as both a dielectric medium for the capacitor, and also a permanent electrical insulator, preventing the charge from flowing between the plates. This allows current to flow through the capacitor while still isolating the electrical charge.When AC voltage is applied, the PTFE dielectric material behaves as a near perfect insulator, allowing a significant amount of charge to build up on the plates. This charge will store energy, and will be released as the applied voltage changes. This causes the capacitor to act as a low pass filter, allowing lower frequency signals - and therefore lower frequency noise - to pass through, while blocking higher frequency signals.

Conclusion

Mica and PTFE capacitors, such as the MCHN38FM390J-Y, provide an effective, space-saving solution for many RF applications. Their combination of high capacitance and low resistance makes them ideal for DC filtering, decoupling and isolation, while their low inductance enables them to work effectively as RFI and EMI suppressors. Finally, their use of electrochemical insulation ensures that they can store energy and block out high frequency signals.

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