Mitsubishi HG-KR43J MELSERVO-J4 400W AC Servo Motor with Oil Seal

Mitsubishi Electric MELSERVO-J4 HG-KR43J is a low‑inertia, small‑capacity AC servo motor for high‑frequency positioning and acceleration/deceleration applications. Rated output 400 W (0.4 kW) at 200 V AC class, 3‑phase. Straight shaft design with built‑in 22‑bit absolute encoder (4,194,304 pulses/revolution) for high‑precision position feedback without battery‑backed homing. Integrated oil seal for protection in applications requiring shaft sealing. IP65 enclosure. 60 mm × 60 mm flange mounting. Natural cooling, no external fan.

Applications:

• High‑frequency positioning in pick‑and‑place and assembly automation

• Semiconductor manufacturing and electronics assembly

• Packaging machinery and labeling equipment

• Food processing equipment (oil‑sealed bearing design)

• Medical equipment and laboratory automation

Core Specifications:

• Rated output power: 400 W (0.4 kW)

• Rated current: 2.6 A

• Maximum current: 9.1 A

• Supply voltage: 200 V AC class (3‑phase)

• Rated torque: 1.3 N·m

• Maximum torque: 4.5 N·m

• Rated rotational speed: 3,000 rpm

• Maximum rotational speed: 6,000 rpm

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

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

• Encoder: 22‑bit absolute encoder (4,194,304 pulses/revolution)

• Shaft type: Straight shaft (without key)

• Shaft oil seal: Yes (integrated)

• Flange mounting: 60 mm × 60 mm

• Connection: 4‑pin rectangular connector

• Protection rating: IP65 (excluding shaft‑through portion)

• Cooling method: Natural cooling (fanless)

Advanced Specifications:

• Permissible instantaneous speed: 6,900 rpm

• Recommended load to motor inertia ratio: ≤ 25 times motor inertia

• Maximum radial load: 245 N

• Maximum axial load: 98 N

• Insulation class: 130 (B)

• Vibration level: V10

• Weight: approx. 1.4 kg

• Ambient operating temperature: 0 °C … +40 °C

• Storage temperature: –15 °C … +70 °C

System Integration:

• This servo motor belongs to the Mitsubishi Electric MELSERVO‑J4 series.

• Compatible servo amplifiers: MR‑J4‑40A (pulse train interface), MR‑J4‑40B (SSCNET III/H interface), MR‑J4‑40GF (fully closed loop), MR‑J4‑40A‑RJ, MR‑J4‑40B‑RJ. Multi‑axis amplifiers: MR‑J4W2‑77B, MR‑J4W2‑1010B, MR‑J4W3‑444B.

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

• For detailed installation, wiring, and parameter setting, refer to the MELSERVO‑J4 Instruction Manual.

Related Products:

• MR‑J4‑40B – 400 W servo amplifier with SSCNET III/H interface

• MR‑J4‑40A – 400 W servo amplifier with pulse train interface

• MR‑J4‑40GF – 400 W servo amplifier with fully closed loop control

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

• MR‑PWS1CBL2M‑A1 – Power cable, 2 m

• MR‑BKS1CBL03M‑A – Battery cable for absolute encoder

• MR‑BAT6V1SET – Battery for absolute encoder