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SM4A1S Smooth-Move Soft-start Controller SM5A1S Smooth-Move Soft-start Controller SM8A1L Smooth-Move Soft-start Controller
Our Price: $352.80
Our Price: $460.00
Our Price: $499.00
SM4A1S Smooth move soft start controller SM4A1S Smooth move soft start controller SM4A1S Smooth move soft start controller

4 Amp. capacity used on motors of 2 HP @ 480 Volts or 1 HP @ 230 Volts, Smooth-Move Speed transitional A.C. soft start, reduced torque control.

Upgrade your crane with smooth starting, reversing, jogging, more precise spotting and inching. Controls all 3 phases for lower mechanical and motor stress. Increase the life, reliability, and productivity of new or existing motorized equipment.


5 Amp. capacity used on motors of 3 HP @ 480 Volts or 1.5 HP @ 230 Volts, Smooth-Move Speed transitional A.C. soft start, reduced torque control.

Upgrade your crane with smooth starting, reversing, jogging, more precise spotting and inching. Controls all 3 phases for lower mechanical and motor stress. Increase the life, reliability, and productivity of new or existing motorized equipment.


8 Amp. capacity used on motors of 5 HP @ 480 Volts or 2.5 HP @ 230 Volts, Smooth-Move Speed transitional A.C. soft start, reduced torque control.

Upgrade your crane with smooth starting, reversing, jogging, more precise spotting and inching. Controls all 3 phases for lower mechanical and motor stress. Increase the life, reliability, and productivity of new or existing motorized equipment.