Mitsubishi HG-KN43J-S100 400W Low Inertia AC Servo Motor for Industrial Automation
HG-KN43J-S100 is a 400W low-inertia AC servo motor from Mitsubishi Electric’s MELSERVO-JE series, designed for high-response positioning and speed control in compact automation machinery. It features 17-bit high-resolution encoder for precise motion, IP65 protection for reliable operation in industrial environments, and smooth compatibility with MR-JE series amplifiers. With low inertia and quick dynamic response, this motor is widely used in small conveyor systems, packaging machines, assembly robots, and other general-purpose automation equipment requiring stable and accurate motion control.
Figure 1 shows the front panel of HG-KN43J-S100.

Table 1 shows the Quick Specs
| Item | Value |
|---|---|
| Model | HG-KN43J-S100 |
| Series | MELSERVO-JE / HG-KN |
| Power | 0.4kW (400W) |
| Rated Torque | 1.27N·m |
| Rated Speed | 3000rpm |
| Encoder | 17-bit absolute |
| Parameter | Specification |
|---|---|
| Model Number | HG-KN43J-S100 |
| Brand | Mitsubishi Electric |
| Series | HG-KN (Low Inertia, Small Capacity) |
| Rated Output | 0.4 kW / 400 W |
| Rated Torque | 1.27 N·m |
| Maximum Torque | 3.82 N·m |
| Rated Speed | 3000 rpm |
| Maximum Speed | 5000 rpm |
| Rated Current | 2.6 A |
| Encoder Resolution | 17-bit (131072 p/rev) |
| Inertia | 0.000375 kg·m² |
| Voltage | 3-phase AC 200–230 V |
| Protection | IP65 (totally enclosed, natural cooling) |
| Insulation Class | B (130°C) |
| Frame Size | 60 mm flange |
| Shaft | Keyway, with oil seal |
| Brake | No |
| Ambient Temperature | 0–40°C (operating) |
| Weight | Approx. 1.5 kg |
| Matching Amplifier | MR-JE-40A / MR-JE-40B |


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