PLEASE NOTE: Effective 2019, we no longer supply Control Techniques variable frequency drives and components. We have drives from several other manufacturers which can meet or exceed the performance characteristics of the Control Techniques line. Simply complete the form below, or contact us with the model of your current or obsolete Control Techniques drive and we’ll be glad to identify a suitable replacement.

Also, the Fincor and Saftronics lines of AC variable frequency drives, DC variable speed drives, and reduced voltage starters were once owned by Emerson but have been obsolete for several years. However, we have many years’ experience working with these drives and can quickly identify replacements capable of exceeding the quality and performance of these older drive technologies. For a suitable replacement, fill out the form below or contact us with your drive or application requirements, and we’ll handle it from there!

Commander SX

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NEMA 4X Washdown Drive

Obsolete Drive Replacement RFQ -

If you need a replacement for an existing obsolete drive, complete the following form and we will send you a quote for a suitable replacement.

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Power Accessories


Control Techniques Commander SX EMC Filter.Commander SX sizes 1 and 2 drives conform to the drive standard EN 61800-3 since they have an RFI filter integrated internally, as standard. For conformity of size 3 Commander SX drives and in certain conditions for sizes 1 and 2, an external RFI filter must be added (part number FS 6376-16-07). The customer connects the filter to the main supply, without any special tools, using an IP 66 dust and damp proof insulation displacement connector. For Commander SX sizes 1 and 2, the filter should be mounted on the left as close as possible to the drive. For size 3, the filter should be mounted on the heatsink.

Description Order Code
IP66 RF Filter FS6376-16-07


The braking resistors are supplied on a metal plate ready to be fixed using 4 screws at the back of the drive. To ensure that the heat losses from the resistors are dissipated correctly, the drive must be fixed with spacers (supplied with the resistors).

Description Order Code
Size 1 and size 2, 300 Watts PX BRK 300-200
Size 1 and Size 2, 600 Watts PX BRK 600-200
Size 3, 300 Watts PX BRK 300-50
Size 3, 600 Watts PX BRK 600-50


The optional PX-Brake solid-state contactor allows the direct control of an electro-mechanical brake from a single phase AC supply. This option is connected to a dedicated digital output, controlled from the brake command (parameter Pr36 to Pr43).

Description Order Code
Brake Contactor PX-BRAKE

Note: This option is protected by a fuse marked “F1” on PCB.

Information provided by Control Techniques, a world leader in the design, production and marketing of electronic drives for the control of electric motors.