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Allen-Bradley 150-F251NZD SMC Flex Smart Motor Controller

Series#: Soft Starter -> Allen-Bradley -> SMC Flex

Allen-Bradley 150-F251NZD SMC Flex Smart Motor Controller
We have large inventory for Allen-Bradley SMC Flex soft starters, 251A solid state motor controllers, 690V rated industrial soft starters and related accessories.
100% Original and new,In stock by Eaton Company.
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Model:
150-F251NZD
Brand:
Allen-Bradley (Rockwell Automation)

Product Description

The Allen-Bradley 150-F251NZD is a 251 Amp SMC Flex solid-state smart motor controller rated for a wider input voltage range of 230–690V AC, making it suitable for higher-voltage industrial power distribution systems up to 250 HP at 690V. It retains the complete SMC Flex feature set including 9 programmable start/stop modes, integrated bypass contactor, and comprehensive motor protection. The 100–240V AC control voltage allows flexible integration with standard industrial control panels. Ideal for heavy industrial applications in mining, oil and gas, large-scale water treatment, and manufacturing facilities operating on 690V supply networks.

Feature	Specification
Manufacturer	Allen-Bradley / Rockwell Automation
Model Number	150-F251NZD
Product Series	SMC Flex (Bulletin 150)
Controller Rating	251 A
Motor Power	100–200 HP @ 460V AC / 250 HP @ 690V AC
Input Line Voltage	230–690V AC, 3-Phase, 50/60 Hz
Control Voltage	100–240V AC
Enclosure Type	Open Type (IP2X with terminal covers)
Internal Bypass	Yes (integrated SCR bypass contactor)
Display	Backlit LCD with keypad
Number of Poles	3
Auxiliary Contacts	4 programmable (N.O./N.C.)
Start/Stop Modes	9 modes + 3 slow speed modes (Soft Start, Current Limit, Dual Ramp, Kickstart, Pump Start, Linear Speed, Preset Slow Speed, Soft Stop, Pump Stop)
Braking Options	SMB Smart Motor Braking, Accu-Stop, Slow Speed with Braking, Coast-to-rest
Line-Connected Current Range	84–251 A
Delta-Connected Current Range	145–435 A
Delta-Connected Max Power	400 HP @ 575V AC
Metering Functions	Amps, volts, kW, kWh, MW, MWH, elapsed time, power factor, motor thermal capacity
Protection Features	Overload, phase loss/imbalance, undervoltage, overvoltage, stall, jam, open gate, underload, overtemperature, comms fault, phase reversal, ground fault, excessive starts/hour
Trip Classes	10, 15, 20, 30
Short-Circuit Rating	Up to 70 kA @ 690V with Class J/L fuse (Type 1 coordination)
Steady-State Heat Dissipation	198 W
Communication	DPI ports for EtherNet/IP, DeviceNet, Profibus, ControlNet (via optional modules)
Dimensions (H×W×D)	560 × 225 × 253.8 mm (22.05 × 8.86 × 9.99 in)
Weight	30.4 kg
Operating Temperature	−5°C to +50°C
Humidity	5–95% (non-condensing)
Altitude	Up to 2000 m
Certifications	UL, CSA, CE, CCC, EAC, RCM, UKCA

Relevant documents

SMC-Flex_150-UM008_User_Manual.pdf

SMC-Flex_150-QS001_Quick_Start.pdf

Faqs

Q: What is the Allen-Bradley 150-F251NZD?

A: The 150-F251NZD is a solid-state SMC Flex Smart Motor Controller manufactured by Allen-Bradley / Rockwell Automation. It is rated for 251A with a wider 230–690V AC input voltage range, making it suitable for higher-voltage industrial systems.

Q: What is the control voltage of the 150-F251NZD?

A: The control voltage is 100–240V AC (not 24V DC). Unlike some other SMC Flex variants with low-voltage DC control, the "Z" in the model suffix designates a specific configuration option while retaining standard AC control power.

Q: What are the electrical specifications of the 150-F251NZD?

A: The controller delivers 100–200 HP at 460V AC and up to 250 HP at 690V AC. It operates on 230–690V AC, 3-phase, 50/60 Hz with 100–240V AC control voltage. Delta-connected configurations support up to 435A and 400 HP at 575V AC. Short-circuit rating is up to 70 kA at 690V with Class J/L fuse.

Q: What are the physical dimensions and weight of the 150-F251NZD?

A: The unit measures 560 × 225 × 253.8 mm and weighs approximately 30.4 kg. It is an open type enclosure with IP2X protection and hockey-puck thyristor modular design.

Q: What communication options are available on the 150-F251NZD?

A: Dual DPI ports support EtherNet/IP, DeviceNet, Profibus, and ControlNet via optional communication modules.

Q: What certifications does the 150-F251NZD hold?

A: The 150-F251NZD is certified to UL, CSA, CE, CCC, EAC, RCM, and UKCA standards.