The 48V General Electric EV1-D Series SCR motor speed controller assembly (2R9 revision) is offered as a ready-to-ship Remanufactured Exchange (RX) unit to eliminate machinery downtime (core charge applies at checkout and is fully refunded upon return of your rebuildable core). Please note: component configurations for this assembly may vary based on one of the three configurations shown below. Please check your existing unit against the photos to confirm exact compatibility.