The Mitsubishi MR-J4-11KB is a servo amplifier in the MR-J4 series, classified under Drives > Servo Drives & Controls within the Motors & Motor Controls category. Its listed part number is MR-J4-11KB.
For a BOM freeze or line-down replacement, the MR-J4-11KB is specified into the design as a current-production part. Sourcing is handled via RFQ — we quote to order against the exact order code.