34518TR Filters

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Common Mode Chokes are electromagnetic components designed to suppress common mode interference in signals, harnesses and other circuitry. A wide variety of applications benefit from the use of common mode chokes because of the advantages they offer in terms of noise control, impedance matching and signal integrity.

The 34518TR make up a category of common mode chokes specially designed for the purpose of dealing with both high-frequency noise and common-mode noise. This patented part is unique due to the fact that it boasts an optimized structure that allows for greater common-mode noise rejection than any other part in its price range.

In terms of application field, the 34518TR is a versatile component that can be utilized in a range of medium to high-frequency noise control circuits, including in-cabin switch circuits, on-board signal line circuits, and more. Furthermore, the parts are also suitable for a variety of noise-control circuits besides those related to automotive use.

The unique attributes of the 34518TR relate to its working principle. Its operational frequency range is between 100kHz and 400kHz, with a typical self-resonance frequency of 190kHz. Our parts manage EMC compliance by using common-mode suppression technology. Common-mode suppression torpedoes noise by separating the noise from the normal signal, eliminating one path and allowing another path for the signal to move.

The 34518TR works by forming a “U” shape, where two “leaves” interact to generate a flux. The air gap of the device helps to control the magnetic properties of the flux, and the self-resonance frequency is determined by the size of the air gap. The commercial tolerance is +/- 10%, and its DCR tolerance is also +/- 10% of the specified value.

The 34718TR also has a high withstand voltage rating, which is 5 times greater than the conventional rating. Its maximum temperature rating is 125 degrees Celsius, ensuring a long life of reliable performance even in extremely hot environments. Furthermore, it also boasts a high impedance at higher frequencies due to the fact that it has a smaller value of inductance than conventional common mode chokes in the same size, allowing it to offer superior noise suppression despite its compact size.

The popular 34518TR common mode choke from STEL has been designed to offer superior noise suppression and an optimized structure for greater EMI-mitigation. While most common-mode chokes rely mostly on the form of the part to accomplish noise suppression, the 34518TR uses common-mode suppression technology to separate noise from the signal. Combined with its optimized structure and high withstand voltage rating, the part far exceeds the capabilities of its competitors in the price range.

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