About Us

OnFILTER products are manufactured in USA at ISO 9000 factory

OnFILTER designs and manufactures special-purpose EMI filters and related instrumentation. We design our own products and manufacture them in California, USA and ship them around the world.  We manufacture both standard and custom products - if you don't see what you are looking for among our standard products, there is a good chance we can make it for you.

OnFILTER was started by Vladimir Kraz who was Director of Instrumentation at 3M, and previously started and ran Credence Technologies, a leading manufacturer of ESD and EMI instrumentation. Vladimir is a member of ESD Association Standards and he is a leader of SEMI Standards' EMC Task Force.

OnFILTER is based in Santa Cruz, California, a wonderful place to live and to raise a family.  We work with the customers around the globe and around the clock.  Contact us for any questions regarding your EMI problems. 

What is EMI?  A formal definition of Electromagnetic Interference is that it is a malfunction of equipment caused by excessive high-frequency signals, either radiated (via air), or conducted (via wires).  Often it is also called RFI - Radio Frequency Interference.  Most conventionally, EMI is understood as undesirable high-frequency signals, and EMI filters as devices that suppress such signals while preserving the "good" ones.         

 ©2017-2021 OnFILTER, Inc. CleanSweep is a registered trademark of OnFILTER

U.S. Patents 10,263,591; 9,076,806 All specifications are subject to change without notice.

Terms and Conditions of Sale

Tel. +1.831.824.4052  FAX +1.206.360.7458

Our products are made in U.S.A.