Cutler-Hammer D165430A Motor Control Rheostat

Cutler-Hammer D165430A is a vintage motor control rheostat with a nominal 20 ohms resistance and a 25 amp rating. This device functions as a variable resistor in motor control circuits, allowing manual adjustment of current to the connected motor and thus influencing performance. The D165430A is a distinct Cutler-Hammer part number, making it a suitable choice for repair, restoration, or replacement in older equipment that requires a 25 A, 20 Ω rheostat. As a motor control component, it is designed for applications where precise current adjustment in a control loop is needed, typically within legacy industrial controls, motor starters, or other equipment that relies on adjustable resistance to control motor operation. The unit’s vintage designation indicates it originates from an earlier generation of Cutler-Hammer hardware, appealing to technicians and integrators working with historical machinery or equipment that uses this specific specification. Use cases include refurbishing aging control panels or retrofitting equipment that specifies a 25A current-handling rheostat with a 20Ω resistance value.