255MHBS40K2H

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Film Capacitors

Film capacitors or film dielectric capacitors are passive electronic components used in electronic circuits for blocking direct current while allowing alternating current to pass. The name originates from the dielectric material being made of thin film. Film capacitors were developed by Sprague in the early 20th century, when he replaced the paper traditionally used in capacitors with thin layers of plastics as the dielectric medium.

255MHBS40K2H

The 255MHBS40K2H is a polyester film capacitor of the Faraday capacitor family. It is a molded solid-state component, with the core housed in a molded case. It is designed for general purpose applications such as load correction, filter networks, snubber circuits, DC-DC converters, AC reactors compensators and harmonic filters. The 255MHBS40K2H has a wide temperature range of -55°C to +155°C with a high maximum DC resistance of 4Mohm.

Application Field

The major application fields of the 255MHBS40K2H includes the following areas:

• Power supplies
• DC-DC converters
• Regulator circuits
• High voltage DC-AC conversion
• Reactor circuits
• Snubber circuits
• Lighting installation

The wide temperature range and high maximum DC resistance makes the 255MHBS40K2H suitable for applications that require robust and reliable components with superior heat, impact and vibration resistance.

Working Principle

Film capacitors are typically constructed using two metal films of different thickness, which are separated by a solid dielectric film, such as polyester. When a voltage is applied across the two metal films, the electric current is blocked and stored in the dielectric film. The result is that when a voltage is applied to the two metal films, the electric charge between the two films is stored or blocked, thus allowing only alternating current to pass through.

The dielectric field or film thickness of the 255MHBS40K2H is accurately controlled and adjusted to maximize the capacitor’s performance and reliability. This adjustable dielectric enables the capacitor to have a high maximum DC resistance without sacrificing its capacity.

The 255MHBS40K2H also features a reliable self-healing process that ensures it recovers after any electrical damage. Self-healing film capacitors are thermally and mechanically stable, and they have a long life due to their low power loss.

Conclusion

In conclusion, the 255MHBS40K2H is a reliable and robust polyester film capacitor designed for general purpose uses. Its wide temperature range, high maximum DC resistance and self-healing process makes it suitable for applications such as power supplies, DC-DC converters, regulator circuits, high voltage DC-AC conversion and reactor circuits. With its adjustable dielectric, the 255MHBS40K2H offers superior performance and reliability and is the perfect choice for any demanding application.

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