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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. 

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