General Purpose – Cast Iron Motors GP100

General Description

The design of our General Purpose –Cast Iron motors provides high structural strength through the use of finite element analysis to strategically place material within each component to resist the effects of stress and vibration. Materials for resistance to corrosion are liberally used throughout for long life in a wide variety of industrial applications. Siemens has designed the line of GP100 motors to meet or exceed NEMA Premium® (NEMA MG1, table 12-12) efficiency requirements. Siemens GP100 severe duty motors are available with a variety of QuikMOD modifications and kits.

Performance Specification

HP Range

1 – 200

Frame Size

140 - 440


Cast iron


NEMA Premium ®

NEMA Premium ® + (FS14-250)






Service Factor



Class F

Temperature Rise

Class B @ 1.0SF,

Class F @ 1.15SF

Conduit Box (Oversized)

Die Cast aluminum


Cast Iron

Fan Cover


Cast Iron

Cooling Fan

Bi-directional - polypropylene


Die Cast Aluminum

Die Cast Copper (S14-250)

Inverter Duty

VT 20:1

CT 4:1

CT 10:1

Frame and End Shields

Cast iron construction for exceptional structural integrity, equipped with integrally cast feet and condensation drain holes. Unique frame fin and fan design maximizes cooling. Its polycarbonate fan and fan cover, corrosion resistant hardware, epoxy enamel paint and aluminum nameplate resist corrosion.


Die cast copper rotor or die cast aluminum that meets or exceeds NEMA MG1 Table 12-12 efficiencies.

Each rotor assembly is dynamically balanced for extended bearing life, and includes a high strength carbon steel (C1045) shaft for maximum rotor performance.


This insulation system meets or exceeds NEMA MG1-2010, Part 31, making all motors suitable for operation with adjustable frequency drives. All windings are tested for CIV.

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