DMM2W4P7K-F

Operating Temperature:	-55°C ~ 125°C
Features:	--
Ratings:	--
Applications:	General Purpose
Lead Spacing:	1.083" (27.50mm)
Termination:	PC Pins
Height - Seated (Max):	1.024" (26.00mm)
Size / Dimension:	1.220" L x 0.630" W (31.00mm x 16.00mm)
Package / Case:	Radial
Mounting Type:	Through Hole
Series:	DMM
Dielectric Material:	Polyester, Metallized
Voltage Rating - DC:	250V
Voltage Rating - AC:	160V
Tolerance:	±10%
Capacitance:	4.7µF
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Film Capacitors

Film capacitors, commonly referred to as polypropylene capacitors, are among the types of capacitors widely used in modern electronics. Film capacitors are a type of non-polarized capacitor which consists of two conductive plates, typically referred to as electrodes, which are insulated from each other by a thin film, commonly referred to as the dielectric, which in most cases consists of a polymeric material. The DMM2W4P7K-F is a variety of film capacitor that is made from a polypropylene film dielectric. It is available in several voltage ratings from ±50V to ±500V and capacitance ratings from 0.001µF up to 1000µF.

DMM2W4P7K-F Application Field

The DMM2W4P7K-F film capacitors are generally suited for use in DC-DC converters, inverters, motor drives, or other applications requiring a low ESR and high capacitance. Film capacitors of this type are typically used in applications requiring high AC ripple currents and high inrush currents. The DMM2W4P7K-F is RoHS compliant and can handle junction temperatures of up to 125°C.

Working Principle

The working premise of film capacitors is fairly simple. When a voltage is applied across the capacitor\'s terminals, an electrical field develops across the dielectric which causes charged particles to be stored at the surfaces of the electrodes. The result of this is a net charge on one of the plates while the other remains at neutral. This charge then creates a separation of charge between the two plates of the capacitor. The electrical field stores up energy from the applied voltage, which is then released when the voltage is removed.

Advantages of DMM2W4P7K-F Film Capacitors

The DMM2W4P7K-F film capacitors are a reliable way to store energy and dissipate heat in high-frequency AC power circuitry. Compared to other types of film capacitors, such as alumina or paper, the DMM2W4P7K-F have a greater insulation resistance and a lower leakage current. Furthermore, due to the polypropylene construction, the capacitors are self-healing, meaning that if the insulation is punctured, the capacitance will be restored. Finally, due to the wide gamut of available ratings, the DMM2W4P7K-F are suitable for many applications.

Conclusion

The DMM2W4P7K-F film capacitors are a reliable and useful option for many applications where high AC ripple currents are required. As they are self-healing, they are particularly suited to environments where the capacitors may be subjected to mechanical or vibration damage. This combined with the range of available capacitance and voltage ratings make the DMM2W4P7K-F a solid choice for a variety of applications.

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