What are EMI filters, exactly? What does it do? How do I configure it? If you have any of these or other questions, please see this PPT, which contains everything you need to know about EMI Filters.

1. Everything About
EMI Filters

2. What is EMI Filters
Electromagnetic interference filters (EMI Filters), also known
as RFI Filters or radio-frequency interference filters, are an
electrical device or circuit that reduces high-frequency
electromagnetic noise on power and signal lines. There are
various electrical and electronic devices, which produce high
frequency noises such as motors, electronic controls, power
supplies, inverters, clock circuits, microprocessors,
appliances, and electronic devices.

3. EMI Filters Divided Into Two Parts
 Conducted EMI
Conducted EMI is transmitted
via conductors such as wires
or power lines.
 Radiated EMI
Radiated EMI travels through
the air without the use of a
conductor.

4. Where Can EMI/RFI Come From
 Natural Causes:
 Lightning
 Solar flares and radiation
 Dust and snow storms
 Electrical storms in the
atmosphere
 Man-Made Causes:
 Electric motors and
generators
 Power supplies
 Cellular networks
 Transmitters
 Transformers
It can be both Natural and Man-Made.

5. Types of EMI Filters Offered by
Premier Filters
 EMI FILTERS
 THREE PHASE EMI
FILTERS
 SINGLE PHASE EMI
FILTERS
 DC EMI FILTERS
 TEMPEST FILTERS
 SCIF FILTERS
 MILITARY/COTS EMI
FILTERS

6. Why Do We Need a Power Line
Filter
 It is required due to the use of high frequency
 Because of harmonic noise created from fast changes in
voltage
 And unwanted current from Switch Mode Power Supplies

7. Process for Selecting an EMI
Filter
 Review Electrical and Operational Requirements
 Analyze Application and System Requirements
 Review Actual EMI Filtering Characteristics
 Preliminary EMC Testing

8. What is EMI Shielding and Why is
it Important for Your Design?
 EMI shield is a metal
housing that blocks
electromagnetic fields from
radiating & coupling into
other circuits or systems
 EMI shields protect
electrical devices from
external radiation.
Gaskets,
Plates,
Conduits,
Honeycomb vents
Braids
Shielding forms

9. EMI Filter Installation Best
Practices
 EMI filters are to be properly grounded/bonded to the host
equipment to achieve optimum performance.
 In EMI Filters Installation make a proper filter wiring and
cable layout
 Do a Proper EMI Filter Mounting

10. ABOUT US
 Premier Filters is a global manufacturer and designer of AC
and DC Power Line Filters.
 Premier Filters leverages over 70 years of combined
experience in delivering the highest quality and
performance products while providing unrivalled customer
service and commitment.
 Premier, headquartered in Southern California,
manufactures in Asia and the United States to meet the
cost and schedule demands of today's global companies.

11. Contact us
ADDRESS
Premier Filters, Inc.
952 N. Elm Street
Orange, CA 92867
CONNECT WITH US
Phone : +1-657-226-0091
FAX : +1-657-223-6495
Email :info@premieremc.com