255PMB122KA

ESR (Equivalent Series Resistance):	2.1 mOhms
Features:	--
Ratings:	--
Applications:	DC Link, DC Filtering; High Frequency, Switching; Snubber
Lead Spacing:	--
Height - Seated (Max):	1.969" (50.00mm)
Size / Dimension:	2.264" L x 1.378" W (57.50mm x 35.00mm)
Package / Case:	Rectangular Box
Mounting Type:	Chassis Mount
Operating Temperature:	-40°C ~ 85°C
Series:	PMB
Dielectric Material:	Polypropylene (PP), Metallized
Voltage Rating - DC:	1200V (1.2kV)
Voltage Rating - AC:	630V
Tolerance:	±10%
Capacitance:	2.5µF
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Film CapacitorsFilm capacitors, also referred to as audio grade capacitors, are components made up of thin layers of high quality plastic (typically polypropylene) with metalized foil electrodes on either side. The layers of plastic and metal are rolled together and encapsulated to form the film capacitor. The construction of the film capacitor is designed to produce components with a high dielectric strength, meaning they can withstand very high voltages. The type of film capacitor used for audio equipment, such as hi-fi systems, PA systems, studios and musical instruments, is called the 255PMB122KA. This type of film capacitor consists of a metalized polypropylene film/foil structure that is encapsulated in epoxy resin. The epoxy resin encapsulation ensures that the film capacitor has superior moisture resistance and dielectric strength as well as very good electrical properties.The working principle of the 255PMB122KA is based on capacitance. Capacitance is a measure of the ability of a device to store an electrical charge. It is represented by the equation C=Q/V, where C is the capacitance, Q is the charge and V is the voltage. The capacitance of the film capacitor is determined by the size of the electrodes and the distance between them. When a voltage is applied to the film capacitor, a charge is stored in the electrodes, thus forming an electric field.The 255PMB122KA is typically used in audio equipment for signal filtering, signal buffering and signal conditioning. As signal filtering, the film capacitor can reduce or remove the unwanted frequencies or noise that can interfere with the audio signal. As signal buffering, the film capacitor stores a charge during the signal peaks and releases it during the signal troughs, thus reducing the average power required to drive the audio signal. As signal conditioning, the film capacitor can stabilize the audio signal.In summary, the 255PMB122KA is a type of film capacitor specifically designed for audio equipment. It is made from metalized polypropylene foil and encapsulated in epoxy resin to give it superior moisture resistance and dielectric strength. The capacitance of the film capacitor is determined by the size of the electrodes and the distance between them. It is used for signal filtering, signal buffering and signal conditioning in audio equipment.

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