JUKI FX-3R Y Servo Amplifier MR-J3-200BN-KM084U646 40104696 The JUKI 40104696 MR-J3-200BN-KM084U646 Y Servo Amplifier is a 2kW servo drive designed for the Y-axis motion system of JUKI FX-3R and FX-3RA SMT placement machines. The complete model identification, including the KM084U646 suffix , is important when selecting a replacement because similar MR-J3 servo amplifiers may use different machine-specific configurations or axis applications. Industry parts references