EMI FILTERING & RF INDUCTORSCOMMON MODE CHOKE FAMILY IMPEDANCE RATED I MAX OF SINGLE PART EIA PACKAGE PEAK IMPEDANCE SPECIAL FEATURES ( Z ) (CONTINUOUS) LINE PAIRS OR SERIES SIZE (Z) FREQUENCY 100 MHz mA CHOKES CM 05 USB 2.0, Low Normal Mode Z 0805 90-370 100-400 1 GHz - 1.4 GHz 1 CH 05 HDMI High Speed Signal 0805 90 400 2000 1 CF Beads Normal Signal, Small Package 0504-0805 67-220 300-400 180-583 1 CM 21 High Current, Low Profile 2021-3421 33-60 15,000 1GHz 1 CM 22 Array Firewire, Gigabit Ethernet 2722-5022 45-200 5,000 200 MHz - 3 GHz 2,3,4 CM 32 Array High Current, High Frequency 3032- 6032 120-300 8,000 150 MHz - 2 GHz 2,3,4 High Current, CM 40 Array 3440-5740 170 20,000 1 GHz 1,2 Low to High Frequency Ultra High Current, CM 41 5441 90-160 75,000 600 MHz - 700 MHz 1 Low to High Frequency CM 44 3 Line Power 4440 110 20,000 500 MHz 3 CM 45 2 & 4 Line Power 2545-4545 130-170 10,000 500 MHz - 1 GHz 1,2 LF CM Low Frequency 1812-5740 100-3500 200-20,000 3 MHz - 80 MHz 1 IMPEDANCE TEST FOR COMMON MODE CHOKES Open Mode Normal/Differential Mode Common Mode Open-Mode Impedance Measurement - Common Mode Impedance Measurement - The common The open-mode impedance characterizes the impedance of mode impedance characterizes the impedance presented by only a single conductor in the ferrite common mode choke. the choke to the unintended common mode currents that might flow in the circuit and cause EMI failures. Since this Normal (Differential) Mode Impedance Measurement current flows in both conductors, it is necessary to short the The normal mode impedance characterizes the impedance conductors on each side of the choke so that test current presented by the common mode choke to the normal flows equally through both conductors. (differential) signals present in the circuit. The test circuit represents the forward and return paths through the device. lairdtech.com More Info: 800.323.3757 30