Severe Duty Motors – SD100 IEEE841

General Description

The SIMOTICS SD100 IEEE841 severe duty motors are designed and built to the very stringent IEEE 841-2009 standard for long, trouble-free life in harsh environments. First used in petroleum and chemical applications, it is also specified in other industries such as pulp and paper, mining, food and beverage, water and wastewater, minerals and more. Users in these industries trust their operations to the SD100 to power fans, compressors, pumps, conveyors, hoists, winders and many more applications in the toughest environments day after day, night after night. Built for long, trouble-free life, they are backed up by a 5-year warranty.

All SD100 IEEE841 motors are inverter duty and have their VFD ratings right on the nameplate. They are designed and manufactured to meet or exceed NEMA Premium® efficiency (MG1 Table 12-12); higher efficiency is available on many sizes with the optional copper rotor. All SD100 IEEE841 severe duty motors are equipped with drive end and opposite drive end Inpro/Seal® bearing isolators. A wide selection of options, among them IP56 ingress protection, encoders, brakes and blowers, plus other QuikMOD modifications provide higher flexibility and reliability in diverse operating conditions.

Performance Specification

HP Range

1 - 400HP

Frame Size



Cast iron


NEMA Premium ® (MG1 - Table 12-12)

NEMA Premium ® + (>MG1 - Table 12-12)




Service Factor

1.15 @ 40ºC


Class F

Temperature Rise

Class B @ 1.0SF,

Class F @ 1.15SF

Conduit Box (Oversized)

Cast iron

Fan Cover

Cast iron

Cooling Fan

Bi-directional - polypropylene

Bronze (S440)

Counter Clockwise (300-400HP s/4 Poles)


Die Cast Aluminum

Die Cast Copper (FS 140-250)


0.06 IPS

Inverter Duty

Standard for Cooper rotor motors
     Inquire about other temperature codes
6)As option (M05 - VSD Fan)

Variable Torque 20:1

Constant Torque CT 4:1

Constant Torque CT 20:1 5)
Constant Torque CT 10:1 6)
Constant Torque CT 6:16)

Frame and End Shields

The SIMOTICS SD100 IEEE841 frame, end shields, fan guard and easy-to-access diagonally split, oversized terminal box are all cast iron. The terminal box features a neoprene gasket and includes a heavy duty ground lug and clearly and permanently marked non-wicking leads. These characteristics plus high strength zinc-plated hardware, epoxy paint and stainless steel nameplates provide exceptional structural integrity and corrosion resistance and make them ideal for severe duty applications in harsh environments.

Rotor and Stator Windings

A unique offset rotor bar design provides improved efficiency, while larger bars and end rings reduce resistance for lower rotor losses. Each die cast aluminum rotor assembly is dynamically balanced for extended bearing life and includes a high-strength carbon steel (C1045) shaft for maximum rotor performance.

The stator is manufactured with premium electrical C5-grade steel laminations and copper electrical magnet wire that furthers the reduction of losses.


The proprietary Class F non-hygroscopic insulation system with NEMA Class B temperature rise provides an extra margin of thermal life. The varnish system ensures maximum winding penetration to provide protection from moisture, corrosion and electrical shock. This insulation system meets or exceeds NEMA MG1 2014 Part 31 making the motors suitable for variable speed drives in constant torque (4:1) and variable torque (20:1). All windings are tested for CIV.

Cooling System

A non-sparking, bi-directional fan is locked and keyed to the shaft. Its low-inertia design reduces windage losses, improves airflow, reduces noise and provides dependable cooling. Cast Iron fan covers are standard for all frames sizes.


Single shielded bearings and V ring slingers are used for optimum bearing protection against contaminants. Inpro/Seal® bearing isolators are standard on both ends.

Did this information help you?