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Document 153

RS-232 EMI Filter Modules - 33745 RS-232 EMI Filter Modules

Coilcraft’s EMI filter modules are an easy, effective wayto eliminate the problems of stray electromagnetic inter- ference (EMI) in signal cables running between poorly filtered equipment.Available in DB-25, -15 and -9 versions, the modulesplug between an RS-232 cable and an input or output port. Common mode magnetics filter all lines including the frame ground, attenuating EMI over the critical 30 - 300 MHz range while leaving data signals totally undisturbed.Comparable EMI filters for circuit board mounting are alsoavailable. ABCPins
MaleDBFemaleDB DLFC9 1.352.250.67 34,2957,1517,029
A DLFC15 1.652.250.67 41,9157,1517,0215 DLFC25 2.162.250.67
B C 54,8657,1517,0225

Typical Attenuation

1 Differential Mode Common Mode Attenuation (dB) re:50 Ohms 3020100-10 0.11101001000 Frequency (MHz) 1.Measured on HP 8753D network analyzer.2.Operating temperature range –40°C to +85°C. 3.Electrical specifications at 25°C. Specifications subject to change without notice.Document 153Revised 11/26/02