![]() These common mode chokes can operate over a wide range of current from 0.06 Amps to 15 Amps, providing attenuation where line filtering is needed, such as in switch-mode power supplies. They are designed to eliminate AC line-conducted common mode noise across a broad range of frequencies, with up to 1500 Vrms isolation. Surface Mount Power Line Common Mode EMI ChokesĬoilcraft low-cost, high performance surface mount power line common mode chokes come in a variety of sizes and packages. Data/Power Line Common Mode EMI ChokesĬoilcraft LPD, MSD and PFD Families are low profile, miniature footprint common mode chokes that can be used to attenuate common mode noise or differential mode noise in both data and power line applications. M2022 can suppress common mode noise up to 500 MHz in a compact 1812 package. These parts provide 15 to 25 dB attenuation, greater than 1000 Ohms impedance and 1500 V isolation between windings. The PTRF Series is optimized for FCC and ITU-T (formerly CCITT) requirements. The PDLF Series can reduce noise by a factor of 32 from 15 MHz to 300 MHz and are available in 2, 3 and 4 line versions. Data Line Common Mode EMI ChokesĬoilcraft CJ5100, CQ7584, and CR7856 surface mount data line common mode chokes are designed to attenuate common mode noise up to 100 MHz. Most provide greater than 30 dB common mode attenuation at 500 MHz and 25 dB in the GHz band. They maintain excellent signal integrity for high-speed communications with -3 dB differential mode cutoff frequencies up to 6.5 GHz. ![]() High-Speed and Super-Speed Data Line EMI ChokesĬoilcraft USB, RA6870, and CM1394 high-speed and Super-Speed data line common mode chokes effectively reduce common mode noise in high-speed interfaces like USB 2.0, USB 3.1 Gen 1, HDMI, IEEE 1394, LVDS, HDBaseTTM, MOST® bus, etc. Choose a category below or use one of our tools to find the right common mode choke for your application. What Types of Common Mode Chokes does Coilcraft Manufacture?Ĭoilcraft designs and manufactures a variety of common mode chokes for many applications. ![]() ![]() Required current-handling: How much differential mode current must it handle?.Required frequency range: Over what frequency bandwidth is the noise?.Required impedance: How much attenuation of noise is needed?.The main criteria for selecting a common mode choke are: In differential mode, the current travels in opposite directions and the flux subtracts or cancels out so that the field does not oppose the normal mode signal. In common mode, the current in a group of lines travels in the same direction so the combined magnetic flux adds to create an opposing field to block the noise, as illustrated by the red and green arrows in the toroid core shown in Figure 1. ![]()
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