Allen-Bradley 150-A05NB Soft Motor Controller

Allen-Bradley SMC-2 150-A05NB Smart Motor Controller is a standalone three-phase soft-start device for 380–460 VAC power with 50/60 Hz operation. It carries a 5 A continuous current rating and will drive small motors up to 1 HP at 230 VAC or 3 HP at 460 VAC, delivering 1.1 kW at 220 VAC and 2.2 kW in the 380–415/460 VAC range. As part of the SMC-2 family, the 150-A05NB provides controlled acceleration and deceleration to reduce inrush and mechanical stress during start and stop sequences. The unit’s voltage tolerance covers -15% to +10% around nominal, accommodating typical supply variation, and the “NB” configuration denotes a specific variant within the Series A lineup. This controller is designed for three-phase 380–460 VAC environments and is suitable for compact machinery and standalone motor control where a full inverter drive is unnecessary, delivering smooth speed ramping at standard 50/60 Hz power.