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TCI's Newest Addition to our Passive Harmonic Filter Line.


Same Day Shipment

Get our most requested products with our quickest turnaround time.


PF Guard Capacitor Bank

Avoid penalty fees and high utility bills with the PF Guard.


Spanish Web Site

The TCI web site is now available in Spanish.


HarmonicGuard Solution Center

The HarmonicGuard Solution Center features a dynamic analysis tool that uses your basic system data to generate accurate harmonic and power quality analysis for your unique application.


MotorShield Sinewave Filter

High performance Motor Protection Output Filter eliminates harmful dv/dt to result in a sinewave output.



HarmonicShield is TCI's newest addition to our passive harmonic filter line

Giving our customers the performance they have come to expect from our industry leading products in a maintenance free, high value package.

HarmonicGuard Active Filters now available in 250 and 500 amp ratings

TCI now offering the LARGEST and WIDEST range in the market today!

Harmonic Distortion in Data Centers

TCI releases Technical paper on Harmonic Distortion in Data Centers.

PF Guard now available

Get more from your existing power system with PF Guard™ from TCI.

Same Day Shipment

Get our most requested products with our quickest turnaround.

MotorShield UL Listed

MotorShield is now UL and cUL Listed.


Harmonic Applications

High Frequency Noise Applications

Motor Protection Applications

TCI, LLC is the premier supplier of peripherals for AC and DC drives and a respected partner of drive manufacturers and distributors worldwide.  Our products include capacitor banksactive harmonic filters, passive harmonic filters, motor protection filters, line reactors, and other high quality products that increase the value and improve the overall system performance of power inverters.

Copyright© 2011 TCI, LLC     Tel. (800) 824-8282     Fax. (414) 357-4484     W132 N10611 Grant Drive, Germantown, WI 53022     Information may be subject to change
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