The Allen-Bradley 150-S135NBD is a three-phase soft starter engineered to deliver controlled motor starting and stopping in industrial applications. Utilizing an onboard microprocessor, this unit provides consistent performance while allowing flexibility to adapt to varying load requirements.

Rated for 135 Amps, the controller includes an integrated bypass that reduces heat buildup and improves overall efficiency during normal operation. Its linear, sensorless acceleration and deceleration help minimize mechanical wear by maintaining smooth and predictable speed changes throughout startup and shutdown cycles.

A selectable dual ramp start function allows operators to configure two separate starting profiles, each with independently adjustable ramp times and torque settings. This makes the unit well-suited for systems that require different startup characteristics under changing conditions.

The 150-S135NBD is built with an open-style design and should be installed within an appropriate enclosure to protect it from moisture and environmental contaminants. It also features built-in diagnostics and protective functions, with alert outputs for conditions such as overload, underload, voltage irregularities, phase imbalance, stalling, and ground faults.

Designed for global use, this soft starter meets multiple international compliance standards and is suitable for operation in typical industrial environments within specified temperature and altitude limits.