FCN3925A105K

Operating Temperature:	-40°C ~ 85°C
Features:	--
Ratings:	--
Applications:	General Purpose
Lead Spacing:	--
Termination:	Solder Pads
Height - Seated (Max):	0.209" (5.30mm)
Size / Dimension:	0.386" L x 0.248" W (9.80mm x 6.30mm)
Package / Case:	3925 (9863 Metric)
Mounting Type:	Surface Mount
Series:	FCN
Dielectric Material:	Polyester, Polyethylene Naphthalate (PEN), Metallized - Stacked
Voltage Rating - DC:	100V
Voltage Rating - AC:	63V
Tolerance:	±10%
Capacitance:	1µF
Moisture Sensitivity Level (MSL):	--
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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IntroductionFilm capacitors, as their name suggests, are capacitors that have a dielectric (an insulating material) embedded between two metal plates. The dielectric is usually a thin layer of polymer film. This type of capacitor has a wide range of applications, from audio-visual equipment and medical devices to industrial and automotive electronics.The FCN3925A105K is a type of film capacitor, specifically a polyester (PET) film capacitor. This type of capacitor has a very low loss factor, and is often used in filter and snubber circuits.Application FieldThe FCN3925A105K film capacitor has a variety of applications. It is primarily used in filter circuits and AC power supply circuits due to its low loss factor. It is also used as a snubber capacitor for circuit protection.Most commonly, the FCN3925A105K capacitor is found in AC power adapters, LED lighting applications, consumer electronics, medical equipment, audio equipment, and any other electronics with a high-frequency pulse. It is also used for EMI filtering in automotive applications.Working PrincipleThe FCN3925A105K capacitor works on the principle of capacitor charge-discharge. It is a two-terminal, non-polarized device. The capacitance is determined by the amount of charge stored in the dielectric layer between two metal plates. The amount of charge stored in the capacitor is proportional to the potential difference (voltage) applied to the two terminals of the capacitor and the capacitance of the device.When a voltage is applied to the two terminals of the capacitor, a current flows through the device. This current causes an electric field to form inside the dielectric and the charge accumulates on the plates, forming an electric field. The charge stored in the capacitor then resists any additional charge from outside sources.The voltage applied to the two terminals of the capacitor determines the amount of current that flows through the capacitor. When the applied voltage increases, the current through the capacitor increases as well. When the voltage is decreased, the current decreases.ConclusionThe FCN3925A105K is a type of film capacitor, specifically a polyester (PET) film capacitor. It is primarily used in filter and snubber circuits due to its low loss factor. Most commonly, the FCN3925A105K capacitor is found in AC power adapters, LED lighting applications, consumer electronics, medical equipment, audio equipment, and any other electronics with a high-frequency pulse. It works on the principle of capacitor charge-discharge, and the voltage applied to the two terminals of the capacitor determines the amount of current that flows through the capacitor.

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