Mitsubishi SC-J2SBJ4KT1K Servo Amplifier Renewal Kit for MR-J2S-B to MR-J4-B 700 W/1 kW

The Mitsubishi SC-J2SBJ4KT1K is a servo amplifier renewal kit for converting MELSERVO MR-J2S-B servo axes to MR-J4-B operation in 700 W/1 kW class systems. It is part of Mitsubishi Electric's MELSERVO renewal tool range and is intended to replace an existing MR-J2S-B amplifier while retaining the upper controller and existing wiring, which helps simplify migration and reduce rewiring work. The kit can also be used for single-axis replacement within a multi-axis system, and it allows MR-J2S-series servo motors to be driven by an MR-J4 amplifier. The unit measures approximately 82 mm in width, 216 mm in height and 202 mm in depth, with a weight of approximately 1.5 kg. Where the original MR-J2S amplifier used its internal interface power, a separate 24 V DC supply with at least 80 mA capacity is required. Typical applications include retrofits of legacy MELSERVO J2S equipment, staged servo drive upgrades and maintenance projects that need to preserve existing control hardware and cabling.