Allen-Bradley 150-A35NBD

Allen-Bradley 150-A35NBD is a SMC-Plus soft-start controller designed for three-phase motors up to 480V AC. It provides reduced-voltage starting to limit inrush current and protect electrical infrastructure during motor startup, a key benefit when feeding heavy loads from variable power sources. The unit accepts 200–480V AC input at 50/60 Hz and is rated for 35 A, equating to 1–25 HP at 480V (18.5 kW). It is configured for three-phase operation and includes a pump-control option for pump-related applications. Electrical specifications include a maximum heat dissipation of 150 W and a 40 VA power requirement, reflecting the device’s moderate power draw while delivering controlled starting. The 150-A35NBD belongs to Allen-Bradley’s SMC-Plus line of soft starters, designed to sequence motor start-up with reduced voltage and ramped acceleration, helping minimize voltage dips and mechanical wear on belts and couplings in pumping equipment and other 3-phase load startups. Typical applications include motor start-up for pumps and other 3-phase loads in industrial automation.