EMI ( Electromagnetic Interference ) Filters, also known as RFI (Radio Frequency Interference) Filters, EMC filters, basically are passive devices that are used to suppress conducted interference that is found on a signal or power line.

1 Low inductance
2 Compact stucture to save spaces and also improve thermal characteristic.
3 Minimal impedance and voltage drop
4 Reduce the harms which is caused by peak voltage to component. Lengthen the life to electronic component
5 Reduce noise and EMI/RFI radiation
6 Easy installation and maintenance
7 Fewer components and improve the system performance
8 Proportionally place capacitor
9 Concise, compact structure

There are a wide variety of EMI Filter (RFI Filter, EMC filter) applications, including (but not limited):
Energy Management Systems
Computers
Automatic Lighting
AM Radio Equipment
Factory Automation Equipment
Implantable Medical Devices (Cochlear Implants,Cardiac Pacemakers, etc.)
Military/Space Electronic Modules
Radio Controls
Telecommunications
Televisions and Monitors
Laboratory Equipment