B32524Q8105M189

Operating Temperature:	-55°C ~ 125°C
Features:	--
Ratings:	--
Applications:	Automotive; EMI, RFI Suppression
Lead Spacing:	1.083" (27.50mm)
Termination:	PC Pins
Height - Seated (Max):	0.965" (24.50mm)
Size / Dimension:	1.240" L x 0.551" W (31.50mm x 14.00mm)
Package / Case:	Radial
Mounting Type:	Through Hole
Series:	B32524
Dielectric Material:	Polyester, Polyethylene Terephthalate (PET), Metallized - Stacked
Voltage Rating - DC:	630V
Voltage Rating - AC:	220V
Tolerance:	±20%
Capacitance:	1µF
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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Film Capacitors

Introduction

Film capacitors, also known as Polyester film capacitors, are non-polar devices that comprise two conducting plates that are separated by a dielectric or insulating film. The construction of such capacitors typically calls for three basic components: the metallization system, the dielectric film, and the electrode foil. These capacitors prove to be extremely reliable, possess good quality, and have low losses.

Application Field and Working Principle

The B32524Q8105M189 is a film capacitor made specifically for interference suppression applications such as in DC/DC converters and switching power supplies. The device employs a polyethylene terephthalate (PET) film dielectric and rectangular aluminum foil electrode with a polystyrene sleeve to allow for AC currents to flow without producing undesired electromagnetic interference (EMI) or emitting high-frequency noise from its terminals.The capacitor works on the basis of electric charge buildup on its metal plates separated by a dielectric material. This electric charge is known as capacitance, resulting from the value of the variable capacitor depending upon the amount of electric charge stored. By storing excess current in the capacitor and sending it back to the load when the current flow starts to drop, these capacitors help reduce common-mode noise and other interfering radiation. The B32524Q8105M189 utilizes a plastic film dielectric which provides superior insulation characteristics and allows for improved insulation dielectric strength, making the device well-suited for long-term use in a wide range of temperatures and humidities. The capacitor often finds use in AC circuits that require low EMI/RFI noise, such as in computers, AV equipment, phones, appliances, and home theater systems. The device also has a higher permittivity compared to most film capacitors and supports higher voltages up to 630Vac.

Advantages

These devices are widely preferred due to their high insulation resistance and tolerance to humidity over other capacitor technologies. The use of a plastic dielectric film further helps in extending the product life and reducing the chances of failure over time. Additionally, film capacitors have low heat-dissipation meaning that they are not as likely to overheat over time as compared to electrolytic capacitors or ceramic capacitors.The use of mounting tabs allow these capacitors to easily be installed/connected and removed from the circuit without having to resort to soldering. Furthermore, these devices are highly reliable and feature a low inductance which helps reduce EMI/RFI noise.

Conclusion

Featuring excellent electrical characteristics and high reliability, film capacitors such as the B32524Q8105M189 are widely popular across a myriad of industries due to their versatile nature. From being used in media converters to stabilizing DC/DC converters, the capacitor often proves to be quite useful in suppressing EMI/RFI noise in AC and DC circuits. Additionally, the device offers superior insulation strength and tolerates well to temperature and humidity making them a perfect fit for long-term applications.

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