About Hazardous Location Environmental Ratings
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About Electric Motors
When replacing a motor, use the information on your motor’s nameplate to guide your selection.
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US-Made Base-Mount AC Motors




Wound, wired, and assembled in the U.S. These base-mount motors are manufactured for durability and include high-quality bearings, so they hold up to occasional overload conditions and spikes in torque. Rated for continuous duty, they’re often used with equipment that requires constant power, such as fans, pumps, and conveyors. Bolt the base of these motors to any flat surface and connect the shaft to your load.
When pairing with a variable frequency drive (AC motor speed control), choose a three-phase motor that’s inverter rated.
Enclosures that are open have vents that let air flow over the motor, which keeps it cool and helps it run efficiently. Use them in clean, dry environments—the enclosure blocks drips and debris that fall from above, but dust and moisture can pass through the vents. Open drip proof (ODP) and open slotted band (OPSB) enclosures only have vents.Enclosures that are totally enclosed don’t have vents, so they can be used in damp and dirty environments. They’re not airtight, but since air isn’t flowing inside the enclosure, the motor won’t run as efficiently as it would in an open enclosure. Totally enclosed fan cooled (TEFC) enclosures have an external fan that blows air over the outside of the enclosure to keep the motor cool. Motors with overload protection turn off in overload conditions to prevent motor damage. Manual overload protection must be reset manually to start the motor after it cools. Optional drip covers are recommended when your motor will be mounted with the shaft facing down. They attach to the back side of the motor to prevent moisture from pooling on top.
For technical drawings and 3-D models, click on a part number.
Motors | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Overall | Shaft | Drip Covers | ||||||||||||||
Power, hp | Max. Speed, rpm | Full Load Current, A | Inverter Rated | Motor Enclosure Type | Lg. | Wd. | Ht. | Dia. | Lg. | Center to Base | Overload Protection Type | Insulation Max. Temp., °F | Each | Each | ||
115/208/230 Volts AC, Single Phase | ||||||||||||||||
NEMA 145T—Welded Base | ||||||||||||||||
1 1/2 | 1,725 | 21.0/9.6/10.5 | No | Open Dripproof (ODP) | 14 1/4" | 10 1/4" | 9" | 7/8" | 2 1/4" | 3 1/2" | Manual | 266° | 00000000 | 000000000 | 00000000 | 0000000 |
1 1/2 | 1,755 | 14.0/7.3/7.0 | No | Totally Enclosed Fan Cooled (TEFC) | 14 1/8" | 9 1/2" | 9 1/4" | 7/8" | 2 1/4" | 3 1/2" | __ | 311° | 00000000 | 000000 | 00000000 | 000000 |
230/460 Volts AC, Three Phase | ||||||||||||||||
NEMA 145T—Welded Base | ||||||||||||||||
1 1/2 | 1,755 | 4.4/2.2 | Yes | Open Slotted Band (OPSB) | 11 3/4" | 9" | 7 1/8" | 7/8" | 2 1/4" | 3 1/2" | __ | 311° | 00000000 | 000000 | 00000000 | 000000 |
1 1/2 | 1,760 | 4.4/2.2 | Yes | Totally Enclosed Fan Cooled (TEFC) | 13 1/2" | 9 1/2" | 7 1/4" | 7/8" | 2 1/4" | 3 1/2" | __ | 311° | 00000000 | 000000 | 00000000 | 000000 |
2 | 1,750 | 5.8/2.9 | Yes | Open Slotted Band (OPSB) | 12 1/4" | 9" | 7 1/8" | 7/8" | 2 1/4" | 3 1/2" | __ | 311° | 00000000 | 000000 | 00000000 | 000000 |
2 | 1,755 | 5.8/2.9 | Yes | Totally Enclosed Fan Cooled (TEFC) | 14 1/4" | 9 1/2" | 7 1/4" | 7/8" | 2 1/4" | 3 1/2" | __ | 311° | 00000000 | 000000 | 00000000 | 000000 |
3 | 3,450 | 7.6/3.8 | Yes | Open Slotted Band (OPSB) | 13" | 9" | 7 1/8" | 7/8" | 2 1/4" | 3 1/2" | __ | 311° | 00000000 | 000000 | 00000000 | 000000 |
Base-Mount AC Motors




To get equipment moving, bolt the base of these motors to any flat surface and connect the shaft to your load. They’re rated for continuous duty, so they’re often used with equipment that requires constant power, like fans, pumps, and conveyors.
When pairing with a variable frequency drive (AC motor speed control), choose a three-phase motor that’s inverter rated.
Motors with a NEMA frame size have an oversized shaft and high-quality bearings to stand up to heavy and side loads better than even our domestic motors. Densely packed windings and thin laminations ensure the motor stays cool and runs efficiently.
Totally enclosed fan cooled (TEFC) enclosures don’t have vents, so they can be used in damp and dirty environments. They have an external fan that blows air over the outside of the enclosure to keep the motor cool. They’re not airtight, but since air isn’t flowing inside the enclosure, the motor won’t run as efficiently as it would in an open enclosure.
Open drip proof (ODP) enclosures have vents that let air flow over the motor, which keeps it cool and helps it run efficiently. Use them in clean, dry environments—the enclosure blocks drips and debris that fall from above, but dust and moisture can pass through the vents.
Motors with automatic overload protection turn off in overload conditions to prevent damage. Once they cool down, they start again automatically.
For technical drawings and 3-D models, click on a part number.
Overall | Shaft | Insulation | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Power, hp | Max. Speed, rpm | Full Load Current, A | Inverter Rated | Motor Enclosure Type | Lg. | Wd. | Ht. | Dia. | Lg. | Center to Base | Overload Protection Type | Class | Max. Temp., °F | Each | |
115/230 Volts AC, Single Phase | |||||||||||||||
NEMA 145T | |||||||||||||||
1 1/2 | 1,740 | 12.8/6.4 | No | Totally Enclosed Fan Cooled (TEFC) | 14 1/8" | 8 3/4" | 8 1/4" | 7/8" | 2 1/4" | 3 1/2" | Automatic | F | 311° | 0000000 | 0000000 |
NEMA 143T/NEMA 145T | |||||||||||||||
1 1/2 | 1,740 | 11.9/5.9 | No | Open Dripproof (ODP) | 15 1/4" | 8 1/2" | 8 1/4" | 7/8" | 2 1/4" | 3 1/2" | Automatic | F | 311° | 0000000 | 000000 |
230/460 Volts AC, Three Phase | |||||||||||||||
NEMA 143T/NEMA 145T | |||||||||||||||
1 1/2 | 1,750 | 4.0/2.0 | Yes | Open Dripproof (ODP) | 12 1/4" | 9 1/2" | 6 3/4" | 7/8" | 2 1/4" | 3 1/2" | __ | F | 311° | 0000000 | 000000 |
1 1/2 | 1,750 | 4.0/2.0 | Yes | Totally Enclosed Fan Cooled (TEFC) | 14 1/8" | 9 7/8" | 7 1/8" | 7/8" | 2 1/4" | 3 1/2" | __ | F | 311° | 0000000 | 000000 |
2 | 1,740 | 5.2/2.7 | Yes | Totally Enclosed Fan Cooled (TEFC) | 14 1/8" | 9 7/8" | 7 1/8" | 7/8" | 2 1/4" | 3 1/2" | __ | F | 311° | 0000000 | 000000 |
2 | 1,740 | 5.4/2.7 | Yes | Open Dripproof (ODP) | 12 1/4" | 9 1/2" | 6 3/4" | 7/8" | 2 1/4" | 3 1/2" | __ | F | 311° | 0000000 | 000000 |
3 | 3,505 | 7.6/3.8 | Yes | Open Dripproof (ODP) | 12 1/4" | 9 1/2" | 6 3/4" | 7/8" | 2 1/4" | 3 1/2" | __ | F | 311° | 0000000 | 000000 |
Base-Mount AC Brake Motors



Unlike standard AC motors, these motors have an integrated brake that activates after a power loss to hold your equipment in place. They’re often used with conveyors to stop them from moving backwards after a power loss, and with hoists to prevent them from dropping a load. Mount their base to flat surfaces. Rated for continuous duty, these motors can run equipment that never turns off. Their shaft is keyed, and they come with key stock. These motors have a TEFC (totally enclosed fan cooled) enclosure that protects better than an ODP (open dripproof) enclosure. They aren’t airtight, but they can be used in dirty, dusty, and damp environments. To keep the motor cool, the enclosure has an external fan that blows air over the outside of the motor.
For technical drawings and 3-D models, click on a part number.
O'all | Shaft | Insulation | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Power, hp | Max. Speed, rpm | Full Load Current, A | Inverter Rated | Motor Enclosure Type | Lg. | Wd. | Ht. | Dia. | Lg. | Center to Base | Class | Max. Temp., °F | Environmental Rating | Each | |
230/460 Volts AC, Three Phase | |||||||||||||||
NEMA 145T | |||||||||||||||
1 1/2 | 1,750 | 4.4/2.2 | No | Totally Enclosed Fan Cooled (TEFC) | 18 1/8" | 9 1/8" | 6 3/4" | 7/8" | 2 1/4" | 3 1/2" | B | 266° | IP43 | 0000000 | 000000000 |
Hazardous Location Base-Mount AC Motors



These motors are rated for environments where hazardous material is present. They are continuous duty and mount horizontally. You can wire for clockwise or counterclockwise rotation; instructions are included. The base is welded to the enclosure.
Hazardous location environmental ratings indicate whether manufacturers have included safety features in products to facilitate their safe use in a hazardous environment. Before selecting a product for a hazardous location, ensure it is rated for your environment.
For technical drawings and 3-D models, click on a part number.
Overall | Shaft | Insulation | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Power, hp | Max. Speed, rpm | Full Load Current, A | Inverter Rated | Lg. | Wd. | Ht. | Dia | Lg. | Center to Base | Shaft Type | Class | Max. Temp, °F | Environmental Rating | Each | |
230/460 Volts AC, Three Phase | |||||||||||||||
NEMA 145T | |||||||||||||||
2 | 1,800 | 5.4/2.7 | Yes | 15 1/4" | 8 5/8" | 9 1/8" | 7/8" | 2 1/4" | 3 1/2" | Keyed | F | 104° | NEC Class I Divisions 1, 2 Group D NEC Class II Divisions 1, 2 Groups F, G | 0000000 | 000000000 |
Programmable Base-Mount Speed-Control Motors
Save space in your control panel with a variable-frequency drive and motor in one unit. These motors require less wiring than motors that need to be attached to a separate drive. They have a base mount that’s welded to the enclosure, so you can secure them to a flat surface. Program the drive to start, stop, change speed, and reverse direction based on inputs from a PLC or sensor. These motors are often used to start or stop a conveyor based on PLC commands or vary the speed of a fan to maintain a room’s temperature.
The shaft is keyed and comes with key stock. Rated for continuous duty, these motors can run machines that require constant power. All have automatic overload protection, which turns motors off if they become overheated and restarts them once they’ve cooled. They also have totally enclosed fan cooled (TEFC) enclosures, which don’t have vents, so you can install them in damp and dirty environments. An external fan blows air over the outside of the enclosure to keep these motors cool.
An IE5 efficiency rating means these motors and drives are rated for the highest efficiency available. From partial to full output, they'll use less electricity than motors with other ratings.
Download free software to control and monitor them in real time. Connect them to your computer via Bluetooth or use a PC connection cord (sold separately) to plug them into a USB port. To integrate them into larger control systems, these motors can be programmed using Modbus-RTU and BACnet protocols. Use a keypad (sold separately) to start or stop motors or to increase or decrease speed in real time. To create a control station, mount the keypad into a panel up to 10 ft. away from the motor with the included cord.
For technical drawings and 3-D models, click on a part number.



Overall | Shaft | Insulation | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Power, hp | Max. Speed, rpm | Full Load Current, A | Motor Enclosure Type | Lg. | Wd. | Ht. | Dia. | Lg. | Center to Base | Class | Max. Temp., ° F | Environmental Rating | Each | |
240 Volts AC, Single Phase | ||||||||||||||
NEMA 145T | ||||||||||||||
2 | 3,450 | 4.4 | Totally Enclosed Fan Cooled (TEFC) | 13 3/8" | 7 1/4" | 11 7/8" | 7/8" | 2 1/2" | 3 1/2" | F | 311° | IP54 | 0000000 | 000000000 |
240 Volts AC, Three Phase | ||||||||||||||
NEMA 145T | ||||||||||||||
2 | 3,450 | 4.3 | Totally Enclosed Fan Cooled (TEFC) | 13 3/8" | 7 1/4" | 11 7/8" | 7/8" | 2 1/2" | 3 1/2" | F | 311° | IP54 | 0000000 | 00000000 |

USB Connection | RJ45 Connection | |||||||
---|---|---|---|---|---|---|---|---|
End Type | End Shape | Gender | End Type | End Shape | Gender | Serial Port Interface | Each | |
Plug | Straight | Male | Plug | Straight | Male | RS-485 | 0000000 | 0000000 |

Overall | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
Voltage Range | Current, mA | Ht. | Wd. | Dp. | Serial Port Interface | Reversing Capability | Environmental Rating | Specifications Met | Each | |
10V DC-36V DC | 30 | 3.19" | 2.6" | 0.95" | RS-485 | Reversing | IP54 | CE Marked | 0000000 | 0000000 |