Allen-Bradley 150-F43NBDB SMC-Flex Smart Motor Controller – 43 A Soft Starter with Pump Control Option

Product Overview

The Allen-Bradley 150-F43NBDB is a solid-state smart motor controller from the Bulletin 150 SMC-Flex family, rated at 43 A and designed to start, stop and protect three-phase squirrel-cage induction motors running on 200…480 V AC systems. In plain terms, it replaces the harsh mechanical shock of across-the-line starting with a controlled voltage ramp produced by antiparallel SCRs, so the motor accelerates smoothly, the supply sees a fraction of the inrush, and belts, gearboxes, couplings and impellers stop paying for every start. The Allen-Bradley 150-F43NBDB covers motors from 7.5 to 30 HP at 460 V AC in line-connected service, and up to 60 HP at 575 V AC when wired inside the delta.What separates the Allen-Bradley 150-F43NBDB from a basic soft starter is how much intelligence sits inside the same open-type chassis. This particular catalog number carries the pump control option, which adds dedicated start and stop curves plus an anti-backspin timer that prevents a still-spinning pump from being restarted in reverse — the classic cause of water hammer, impeller damage and seal failure. Around that core it provides eleven operating modes including soft start, current limit, kickstart, dual ramp, full voltage, soft stop, smart motor braking, preset slow speed and linear speed acceleration, so one controller can be tuned to a conveyor, a fan or a pump without changing hardware.Because the Allen-Bradley 150-F43NBDB also carries integrated electronic overload protection, metering and diagnostics, it frequently removes components from the bill of materials rather than adding them. There is no separate thermal overload relay to specify, no external energy meter to install, and no separate annunciator panel to wire: the backlit LCD reports current, voltage, kW, kWh, power factor, elapsed time and motor thermal capacity usage, while four programmable auxiliary contacts and a DPI port let the controller report status to a PLC, SCADA system or network. It is an active, in-production Rockwell product, which matters greatly to plants standardizing on long-term supported hardware.

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Description

Technical Specifications

Parameter Name	Parameter Value
Product Model	Allen-Bradley 150-F43NBDB (UPC 781180617652)
Manufacturer	Allen-Bradley / Rockwell Automation
Product Type	SMC-Flex Smart Motor Controller / Solid-State Soft Starter
Product Series	Bulletin 150, SMC Flex sub-brand
Controller Rating	43 A
Control Options	Pump control with anti-backspin timer
Rated Operational Voltage	200…480 V AC (-15 %, +10 %), 3-phase, 50/60 Hz
Control Supply Voltage	100…240 V AC, 50/60 Hz
Line-Connected Motor Current	8.6…43 A @ 500/575 V AC, 3-phase
Delta-Connected Motor Current	14.9…74 A @ 500/575 V AC, 3-phase
Motor Power	7.5…30 HP @ 460 V AC line connected; max 40 HP @ 575 V AC line, 60 HP @ 575 V AC delta
Overload Protection	Integrated electronic I²t, trip classes 10, 15, 20 and 30; trip at 117 % of motor FLC
Starting Modes	Soft start, kickstart, current limit, dual ramp, full voltage, pump control, linear speed acceleration
Stopping Modes	Coast, soft stop, smart motor braking (SMB), Accu-Stop
Auxiliary Contacts	Four programmable contacts (19/20, 29/30, 31/32, 33/34), Ith 5 A AC/DC
Display and Interface	Integrated backlit LCD with keypad; two DPI ports for HIM and communication modules
PTC Input	Up to 6 sensors, max cold resistance 1500 Ω
Dielectric Withstand / Impulse	2500 V per IEC dielectric; 6000 V rated impulse voltage; 1400 V repetitive peak inverse
Short-Circuit Rating	Up to 70 kA @ 600 V with Class J or L time-delay fuses; Type 1 SCPD coordination
Enclosure Type	Open type, panel mounting, minimum enclosure 406 × 305 × 203 mm
Approximate Weight	5.90 kg (13.00 lbs)
Lifecycle Status	Active

Main Features and Advantages

Pump control engineered for fluid systems: The option that defines the Allen-Bradley 150-F43NBDB is its pump control package. Starting and stopping curves are shaped specifically for centrifugal loads, so pressure rises gradually instead of stepping, and the anti-backspin timer blocks a restart while the pump is still rotating in reverse after a stop or a power interruption. Anyone who has rebuilt a pump after a water-hammer event knows the value of that single function, and having it in the controller means no external timer, no additional relay logic and no extra panel space.Eleven operating modes on one platform: The Allen-Bradley 150-F43NBDB adapts to the load rather than forcing the load to adapt to it. Soft start gives a linear voltage ramp with an adjustable initial torque from 0 to 90 % of locked-rotor torque; current limit holds inrush at 150, 250, 350 or 450 % of full-load current, which is what you want when the supply transformer is small; kickstart delivers 450 % FLA for 0 to 1.5 seconds to break a loaded conveyor free; dual ramp handles loads that change character mid-acceleration; and smart motor braking with adjustable braking current up to 400 % FLA decelerates high-inertia loads without any additional braking hardware. Start times are selectable at 2, 5, 10, 15, 20, 25 or 30 seconds.Protection that eliminates separate devices: Integrated electronic overload protection on the Allen-Bradley 150-F43NBDB uses a true thermal model with selectable trip class, so an external overload relay becomes unnecessary. Around it sits a diagnostic suite covering stall, jam, underload, phase reversal, voltage unbalance, undervoltage, overvoltage, open gate, excessive starts per hour, controller temperature, ground fault and communication fault. Each condition is both displayed on the LCD and assignable to an auxiliary contact, so the maintenance team sees the reason rather than just a stopped motor.Energy visibility and integration: Built-in metering on the Allen-Bradley 150-F43NBDB reports amps, volts, kW, kWh, MW, MWh, power factor, elapsed time and motor thermal capacity usage in real time — data that turns a motor control centre into a point of energy accountability. Two DPI ports accept a human interface module or a communication adapter, letting the controller join EtherNet/IP, ControlNet, DeviceNet or Profibus architectures without changing the power wiring.Reduced heat by design: Once the motor reaches speed, the Allen-Bradley 150-F43NBDB closes its internal bypass contactor and the SCRs stop conducting. That removes the continuous semiconductor losses from the panel, lowers the cabinet cooling requirement and improves overall efficiency — a practical advantage over soft starters that keep their SCRs in circuit during the run.