Allen-Bradley 150-F43NBRD SMC Flex Smart Motor Controller – 43A, 460V

Product Introduction

When your production line demands precise motor control and reliable protection, the Allen-Bradley 150-F43NBRD SMC Flex Smart Motor Controller delivers. This soft starter handles motors from 7.5 to 30.0 Hp at 460V AC, with a full-load current rating of 43 A. It integrates seamlessly into 200–480V AC power systems, making it a versatile choice for industrial automation. The 150-F43NBRD includes an integrated display for real-time status monitoring, showing stopped, starting, stopping, at speed, alarm, and fault conditions. As part of the SMC Flex family, it combines solid-state starting with advanced motor protection in a compact, open-type enclosure.

Technical Specifications Breakdown

The 150-F43NBRD operates with a control voltage of 24V AC/DC, ensuring compatibility with standard industrial control systems. Its power circuit handles a rated operational voltage of 200–480V AC (-15%, +10%) per UL/CSA/NEMA, with a frequency of 50/60 Hz. The controller provides overload protection with trip classes 10, 15, 20, and 30, and a trip current rating of 117% of motor full-load current. For line-connected motors, the overload current is 8.6 A, while for delta-connected motors it reaches 14.8 A. The device includes an RC snubber network for DV/DT protection and metal oxide varistors (220 J, optional) for transient suppression. Its insulation voltage is rated at 500V per IEC, with a dielectric withstand of 2500V per IEC. The operating temperature range is -5 to 50 °C (23 to 122 °F) in open configurations, and the enclosure offers IP20 protection per IEC. The controller weighs 5.7 kg and measures 150 mm wide, 203 mm deep, and 321 mm high.

Industry Applications

The 150-F43NBRD excels in applications requiring controlled acceleration and deceleration of three-phase induction motors. In conveyor systems, it reduces mechanical stress and prevents load shifting by providing smooth starts. For pumps, it eliminates water hammer and reduces pipe wear. The integrated SMB smart motor braking control (optional) allows rapid stopping without additional equipment, ideal for centrifuges or packaging machinery. The controller supports both line and delta motor connections, with maximum motor power up to 40 Hp (line) or 60 Hp (delta) at 575V AC. Its programmable auxiliary contacts (19/20, 29/30, 31/32, 33/34) enable integration with PLCs and safety circuits.

Installation & Setup Guidance

Mount the 150-F43NBRD in a clean, dry environment within its specified temperature range. Use copper conductors rated for 75°C minimum. For power terminals, tighten to 14.7 Nm (130 in-lb). The lower line and load side cables accept 0.8–2.5 mm² (18–14 AWG), while upper line side cables accept 2.5–95 mm² (14–3 AWG) and upper load side cables accept 2.5–50 mm² (14–1 AWG). Wire strip length for power terminals is 18–20 mm (0.22–0.34 in). Connect the control circuit to a 24V AC/DC supply, ensuring the input OFF-state current remains below 10 mA AC or 3 mA DC. The controller includes an internal bypass for energy efficiency during run mode.

Maintenance & Reliability

The 150-F43NBRD uses a heatsink thyristor modular design for reliable power switching. Its internal bypass reduces heat dissipation during continuous operation, extending component life. The device includes integrated motor overload protection and PTC thermistor input for direct motor temperature monitoring. The control modules are constructed from thermoset and thermoplastic moldings, with metal parts of plated brass, copper, or painted steel. Periodic inspection of the heatsink fan (rated 20VA at 110/120V AC or 220/240V AC) and control transformer (75VA at 100–240V AC) ensures consistent cooling. The controller operates at altitudes up to 2000 m and in humidity from 5–95% noncondensing.

Selection Guide & Purchasing Advice

When selecting the 150-F43NBRD, verify your motor's full-load current and connection type (line or delta). The controller supports short-circuit protection devices including standard fuses, circuit breakers, and high-capacity time delay Class CC/J/L fuses. For high available fault currents up to 70kA at 600V, use Class J or L fuses. The controller requires a minimum control power supply of 1606-XLP50E at 24V DC. For complete technical specifications and current lifecycle status, contact BluePLC Industrial. Our team can confirm availability and recommend compatible accessories for your specific application.