FN258L-30-33

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Power Line Filter Modules: FN258L-30-33 Application Field and Working Principle

Power Line Filter Modules, like the FN258L-30-33 available from SCHURTER, provide an effective way for preventing interference between connected electronic systems, as well as enhancing protection against external interference. This article will focus on the application field of the FN258L-30-33 Power Line Filter and also explain its working principle.

The FN258L-30-33 Power Line Filter is suitable for a wide variety of applications in the information technology, broadcasting, medical, industrial automation and automotive industries, amongst others. Compatible equipment includes computers, housings, connections, drives, control devices, IT tools, frequency converters and power supply units. The module also has a UL94 flame recognition index of UL94V-0, providing protection against environmental factors as rust, dust, snow and salt spray.

The FN258L-30-33 Power Line Filter is provided in a 13.4 mm x 4.2 mm shielded rectangular housing and features a compact layout of two, three or four IEC terminals with a maximum current rating of 10A. It also features an overcurrent protection of 5A with an permitted operating voltage of 250V. The Inrush Current of the module is 14.7A.

In terms of the working principle of the FN258L-30-33 Power Line Filter, this is as follows. After inrush current from a load has passed through the module, the circuit is activated and the load is switched on. The module then reduces input current levels (ripple current and harmonic distortion as well as noise) to safe levels, maintained via a capacitive current path and a current path from the line to ground. After the input current levels have been reduced by the Power Line Filter Module, they are then returned via a return path.

The effective suppression, along with the supplementary surge protection, is an important feature of the FN258L-30-33 Power Line Filter. When a surge in the mains supply is present, this will have a proportionally higher voltage than that of the normal level of the mains supply. However, when the voltage rises above a certain threshold, it will activate the surge protection feature of the power filter module, which will switch off the circuit and thereby protect connected circuits and equipment from damage.

Finally, due to its effective suppression, the FN258L-30-33 Power Line Filter also meets the requirements of the Immunity Standard IEC 60950 (referred to elsewhere as the EMC standard). This standard applies to all computer systems, including computers, displays, the corresponding accessories, and the power supplies, as well as those interconnected via the internet. It is the responsibility of the manufacturer to ensure that devices are immune to the electromagnetic compatibility standards.

In conclusion, Power Line Filters such as the FN258L-30-33 contribute to the regulation, protection and proper functioning of memories, processors, stone equipment, disks and other devices in computers, as well as other interconnected systems. The FN258L-30-33 provides effective suppression, along with surge protection, and can also meet the requirements of the immunity standard IEC 60950.

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