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Servo Motor / VFD Filter SF20201

OnFILTER' Servo Motor / VFD Filter SF20201

This filter qualifies for UL 508A panels by being certified to UL1283 and/or UL/IEC60939 Standards

Servo / VFD EMI filters help to substantially reduce EMI in the equipment and to protect motor's bearing from EDM-caused fluting.  These patented filters are complete multiple-mode filters, providing comprehensive noise reduction, not just reactors.

This model of servo motor/VFD filter is most suited for motors consuming up to 20A.  For lower current applications see our 3A and 10A models.   If you are looking to include an AC input filter for the drive, please see our combo model which combines in one small package both motor and AC EMI filters.

All specifications are subject to change without notice
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"We tested the servo filter on another system, this time with Kollmorgen motors. We saw another significant reduction in noise on our signal"  (P.M.,U.K.)

If you are not sure which specific model would work with your drive/motor, send us a legible photo of drive and/or motor label and if you know, the specific models 

  • No mechanical attachments

  • No changes in software

  • No adjustments

Mounting Dimensions

SF20031, SF20032 and SF20101
Click on drawing to enlarge
Servo / VFD Filter SF20201 Dimension

SF20201 Dimensions - click to magnify

Basic Connections of Servo / VFD Motor Filter

SF20101 shown - connections for SF20201 are identical
OnFILTER' Servo Motor / VFD Filter Connections and Performance
Ground current in a motor without flter
Ground current in a motor with SF series EMI filter

Ground Current Reduction with SF Series Motor Filters

Pulse edge modification in SF series EMI filter

Pulse Edge Modification

Application Notes

Filters for Servo Motors and VFD

Practical Aspects of Managing EMI-Caused EOS in IC Handlers and Similar Equipment

Measurements of Conducted Emission in the Manufacturing Environment

EMI-Generated EOS in a Wire Bonder

Mitigating EMI Issues in Servo Motors and Variable Frequency Drives

Dealing with EMI in Semiconductor Device Manufacturing

EOS Sources in Automated Equipment

Managing EMI in Back-End IC Manufacturing, TAP Times

EMI-Caused EOS Exposure of Components and its Mitigation

Origins of EOS in Manufacturing Environment and Its Classification

Technical Articles
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