Durability, high performance, efficiency

siemens low voltage nema general purpose motors

SIMOTICS NEMA low voltage general purpose motors

Siemens NEMA General Purpose motors are the optimum, highly versatile motor for a wide spectrum of applications. High performance aluminum motors provide light weight and durability while rugged cast iron motor assure reliability and long lasting performance. These motors significantly reduce operating costs and pay for themselves in a short time through energy savings, especially when supplied with optional copper rotors that yield efficiencies above NEMA Premium levels.

It's not just rated "GP"

For some people, "general purpose" has become synonymous with marginal or bare-minimum quality. This simply does not apply to SIMOTICS NEMA GP motors. High structural strength is ensured through the use of finite element analysis to strategically place material within each component to resist the effects of stress and vibration. Corrosion-resistant materials are used liberally throughout for long life in a wide variety of industrial applications.

All NEMA GP 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. A wide selection of options and QuikMOD modifications provide great flexibility to this extremely reliable motor.



These finned TEFC aluminum frame general purpose motors are very similar in construction and materials to SIMOTICS SD100 severe duty motors and cast iron GP100 motors, but are less costly because of the aluminum frame and moderate-environment design. 


SIMOTICS NEMA GP100 cast-iron
The cast iron GP motors are also very similar in construction and materials to SD100 severe duty motors, but are less costly because they are intended for moderate environments – resulting in many severe duty features in a general purpose cast iron motor

  • Frame and end shields
    The SIMOTICS GP100A frame and end shields are thick, high-quality aluminum, as is the easy-to-access diagonally split, oversized heavy-walled terminal box. The terminal box features tapped conduit entry holes, a neoprene gasket and includes a heavy duty ground lug and clearly, permanently marked non-wicking leads. The feet are removable and can be reattached in different locations thus changing the terminal box location to F2 or F3. These characteristics plus high strength zinc-plated hardware and stainless steel nameplates provide exceptional structural integrity and make them ideal for material handling, pumps, fans, compressors and other applications in moderate industrial and commercial 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
  • Insulation
    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. A durable, rigid plastic fan cover is standard
  • Bearings
    Double-shielded antifriction ball bearings are standard for the drive end
SIMOTICS NEMA GP100 cast-iron
Frame size range
140T - 250T
140T - 449T
Output range
1 – 20 Hp
1 – 200 Hp
Die-cast aluminum







Number of poles
2 / 4 / 6 / 8

NEMA Premium® (MG1 - Table 12-12)

NEMA Premium® + (>MG1 - Table 12-12)

Foot-Mount, D flange; C flange
Service factor
1.15 @ 40ºC
Class F
Temperature rise

Class B @ 1.0SF

Class F @ 1.15SF

Conduit box (oversized)
Aluminum FS 140-250

Steel - FS140-400

Cast Iron - FS400

Fan cover

Die Cast Aluminum

Die Cast Copper

Die Cast Aluminum

Die Cast Copper (S14-250)

Inverter duty

VT 20:1

CT 4:1

CT 10:1

Easy configuration and ordering

For SIMOTICS NEMA low voltage general purpose motors

You can easily and quickly configure the motors with the Siemens Drive Technology configurator and then order via the Industry Mall ordering system.