HG-KR43J 400W AC Servo Motor 22-Bit Encoder Oil Seal | Mitsubishi Electric

The Original New Mitsubishi Electric HG-KR43J is a 400 W (0.4 kW) low-inertia AC brushless rotary servo motor from the MELSERVO-J4 series, designed for high-precision positioning and high-frequency operation in industrial automation. Featuring a built-in 22-bit absolute feedback encoder (4,194,304 ppr), a straight shaft with integrated oil seal, and a compact 60×60 mm flange mounting, it delivers precise motion control with protection against oil mist, coolant, and other contaminants. The motor operates at a rated speed of 3000 rpm with a maximum speed of 6000 rpm, making it suitable for machine tool feed axes, packaging machinery, and general industrial equipment requiring reliable, high-response servo performance.

Core Engineering Highlights:
400 W (0.4 kW) rated output | 2.6 A rated current / 9.1 A maximum | 1.3 N·m rated torque / 4.5 N·m maximum torque | 3000 rpm rated / 6000 rpm maximum speed | 22-bit absolute encoder (4,194,304 ppr) | Straight shaft with integrated oil seal | 60×60 mm flange mounting | IP65 protection | 0°C to +40°C operating temperature

Key Features:

• Original New Mitsubishi Electric HG-KR43J servo motor

• 400 W (0.4 kW) rated output with 1.3 N·m rated torque

• Built-in 22-bit absolute feedback encoder (4,194,304 pulses/revolution) for precise position detection without battery-backed homing

• Integrated oil seal for protection against oil mist, coolant, and contaminants

• Low-inertia, small-capacity design for high-frequency positioning

• Straight shaft (without key) for direct coupling

• Maximum speed 6000 rpm for high-speed positioning

• Natural cooling (self-cooled, fully enclosed)

• Moment of inertia: 0.371 kg·cm² (0.0000371 kg·m²)

• Recommended load to motor inertia ratio: 25 times or less

• Power rate at continuous rated torque: 43.7 kW/s

• Maximum radial load: 245 N / Maximum axial load: 98 N

• Insulation class: Class B

• 60×60 mm flange mounting

• IP65 protection rating for dust and water jet resistance

Applications:

• Machine tool feed axes and precision positioning

• Packaging machinery servo axes

• Conveyor positioning and material handling systems

• Semiconductor manufacturing equipment

• Industrial robotics and automated assembly

• General high-precision motion control applications requiring oil seal protection

Technical Specifications:

System Compatibility:

• Compatible with Mitsubishi Electric MELSERVO-J4 series architecture. Drive model and firmware compatibility should be verified before installation.

• Verified compatible 1-axis servo amplifiers: MR-J4-40GF, MR-J4-40GF-RJ, MR-J4-40B, MR-J4-40B-RJ, MR-J4-40B1, MR-J4-40B1-RJ, MR-J4-40A, MR-J4-40A-RJ, MR-J4-40A1, MR-J4-40A1-RJ

• Verified compatible 2-axis servo amplifiers: MR-J4W2-77B, MR-J4W2-1010B

• Verified compatible 3-axis servo amplifier: MR-J4W3-444B

• For absolute position retention during power-off, install an MR-BAT6V1SET battery backup unit

Related Products:

• MR-J4-40B – 400 W servo amplifier, SSCNET III/H interface

• MR-J4-40A – 400 W servo amplifier, pulse train interface

• MR-J4-40GF – 400 W servo amplifier, fully closed loop control

• MR-J4W2-1010B – 2-axis servo amplifier

• MR-J4W3-444B – 3-axis servo amplifier

• MR-J3ENCBL2M-A1-L – Encoder cable, 2 m (standard bending life)

• MR-PWS1CBL2M-A1 – Power cable, 2 m

• MR-BAT6V1SET – Battery for absolute encoder

PLC ERA is an independent industrial automation distributor supplying genuine Original New products through established global supply channels. All products are factory sealed when applicable and undergo quality inspection prior to shipment. Mitsubishi Electric and MELSERVO are trademarks of Mitsubishi Electric Corporation.