Your Source for Variable Frequency Drives!

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AC Drives

You can either view our entire list of AC Drives or pick a category or brand below.

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  • Search All AC Drives
    Search all of our AC drives using our easy filter feature! Search by input type, housing, drive types - any way you like!
  • HVAC Drives (Fan/Pump)
    Drives that have special features specifically for the fan and pump market/HVAC!
  • Single Phase Input
    We have single phase input drives available in 120 volt or 230 volt, up to 5 hp!
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Popular Products You might be interested in these popular AC Drives
Vector Drive For Fan & Pump Applications<BR>7.5 to 800 hp!<br>Fuji Frenic P11
Vector Drive For Fan & Pump Applications
7.5 to 800 hp!
Fuji Frenic P11
Broad HP rating for variable torque applications.
Direct cross to the GE AF-300P11 series.
Starting at $671.00
General Purpose Drive, IP20<br>Up to 15hp, Single or 3 Phase<br>AC Tech SCM/SM
General Purpose Drive, IP20
Up to 15hp, Single or 3 Phase
AC Tech SCM/SM
Ready to use right out of the box - simple to program and easy to install!
Ideal for applications requiring variable speed, soft starting or reversing operation.
Starting at $134.75
Large Capacity Vector Drive, Up to 150hp, Fan/Pump Apps<br />Hitachi L300P
Large Capacity Vector Drive, Up to 150hp, Fan/Pump Apps
Hitachi L300P
Available from 2 to 175 hp in 208/240V or 380/480V!
NEMA 1 up to 40hp, IP20 above!
Starting at $543.75
General Purpose Vector Drive, NEMA 1<br>1/4 to 600 hp!<BR>Fuji Frenic G11 Series
General Purpose Vector Drive, NEMA 1
1/4 to 600 hp!
Fuji Frenic G11 Series
Broad HP rating for constant torque applications.
This was the GE AF-300G11 drive!
Starting at $451.40

Marshall Wolf Automation is a large stocking distributor with engineers on staff to assist you!
If you need any assistance at all please contact us!

AC Drives - Variable Frequency Drives (VFD)- Inverters
AC Tech, Fuji, Hitachi, Delta, U.S. Drives

NEMA Ratings for Variable Frequency Drives:
 NEMA 1: for indoor installation in a relatively clean environment,
provides limited protection against falling dirt.

NEMA 12: for indoor installation, provides protection against circulating dust,
falling dirt and dripping, non-corrosive liquids.

NEMA 4: for indoor installation, provides protection against windblown dust and rain,
splashing water, hose-directed water and damage from external ice formation.

NEMA 4X for indoor installation: NEMA 4 protection (see above) plus
protection against corrosive or caustic agents.

NEMA 4X for indoor/outdoor installation: NEMA 4 protection (above) plus
protection against corrosive or caustic agents.

AC Tech Lenze is the only variable frequency drive manufacturer to offer an outdoor choice!