The ALLEN BRADLEY 150-S317NBD is a soft starter and smart motor controller (SMC-50) with 317 AMP capacity and internal bypass. Designed for 200-480 VAC 3-phase power systems at 50/60 Hz frequency, it features 100-240 VAC control voltage in an open enclosure configuration. This unit comes with Radwell's 2-year warranty (factory warranty not applicable).