Syfer Technology is offering a range of compact, panel mounted T filters to provide EMI protection in a wide range of industry sectors. The first two families to become available are the SFKKT and SFAKT, featuring round or hexagonal bodies respectively. These feedthrough EMI filters are smaller than previous versions, and are claimed to be smaller than competitive devices for equivalent capacitance values. They are particularly suitable forequipment where panel space is at a premium; the SFKKT, for example, has a 4.6mm pitching and screw-in heads for high density mounting.
The T filters integrate two inductors and one discoidal multilayer ceramic capacitor, utilising C0G or X7R dielectric material. They deliver capacitance values from 10pF to 47nF, with a maximum operating voltage of 500Vdc, up to 6.8nF.
The filter devices offer excellent insertion loss performance up to full rated voltage and to the extremes of rated temperature (-55 to 125oC). They are designed primarily for circuits with a low impedance source and low impedance load, such as dc power lines.