Product Overview
The Allen-Bradley 150-F251NCD is an SMC-Flex Solid State Motor Controller engineered for three-phase motor control. Its open enclosure suits integration into existing industrial switchgear and control panels. The 150-F251NCD delivers 251 A and 200 Hp at 460V AC, and its 200-575V AC, 3-phase input line voltage supports 50 and 60 Hz networks. This Allen-Bradley 150-F251NCD model controls the power transferred to connected machinery, making it a practical upgrade for facilities replacing older across-the-line starters.
Key Technical Specifications
The table below summarizes the 150-F251NCD parameters directly from the manufacturer's data.
| Parameter |
Value |
| Manufacturer |
Allen-Bradley (150-F251NCD) |
| Category |
Drives |
| Product Line |
SMC-Flex |
| Part Number |
150-F251NCD |
| UPC |
662073060215 |
| Weight |
32.06 lbs (14.54 kg) |
| Bulletin Number |
Solid State Controller |
| Enclosure Type |
Open |
| Controller Rating |
251 A, 200 Hp @ 460V AC |
| Input Line Voltage |
200-575V AC, 3-phase, 50 and 60 Hz |
| Control Voltage |
100-240V AC (5-480 A units) |
| Rated Voltage |
500/575V AC |
These specifications confirm that the 150-F251NCD fits motor control retrofit projects where line voltage, control voltage, and output rating must match existing system demands.
Real-World Applications
In industrial plants, the 150-F251NCD works well for conveyors, pumps, compressors, and fans. Its 3-phase input line voltage ensures consistent performance on 50 or 60 Hz systems. The controller's 251 A rating and 200 Hp @ 460V AC output make it a strong match for medium-horsepower motor installations. Because the unit includes electronic motor overload protection, it provides an integrated control and protection solution during an upgrade.
Retrofit & Installation Guidance
When replacing an older motor starter with the Allen-Bradley 150-F251NCD, verify the line voltage matches the 200-575V AC, 3-phase input rating. Confirm the motor's rated current does not exceed the 251 A controller rating. The open enclosure requires clean, dry cabinet space with adequate air circulation. Mount the unit securely and check that the control voltage is within 100-240V AC for units rated 5-480 A. The rated voltage of 500/575V AC should match the motor and applied line system. During installation, keep the 14.54 kg weight in mind and use proper lifting procedures.
Selection & Purchasing Advice
Before ordering the 150-F251NCD, check your motor full-load current and supply voltage. The 251 A rating and 200-575V AC input are the primary selection criteria. If your system operates at 500 or 575V AC, the rated voltage of this controller aligns with those voltage classes. For sourcing genuine industrial automation spares, PLC Source PRO lists the Allen-Bradley 150-F251NCD alongside other drives and control system parts. Confirm your application requirements before purchase to ensure the controller matches the motor and enclosure configuration.