





The MITSUBISHI MELSERVO-J3 SERVOMOTOR WITH BRAKE 400W HF-KP43B is a state-of-the-art AC servo motor from the HF-KP series, engineered for low inertia and small capacity applications. This model delivers 400W rated output with a rated torque of 1.3 N·m, and can achieve a maximum torque of 4.46 N·m for short-duration peak loads. It features an electromagnetic brake that provides secure holding torque, making it suitable for vertical axes and safety-critical installations. The motor is paired with an 18-bit encoder (262,144 pulses per revolution) for ultra-precise feedback, ensuring tight speed and position control. With a rated speed of 3000 r/min and a maximum speed of 6000 r/min, it excels in high-speed automation tasks. The HF-KP43B is IP65-rated (totally enclosed, non-ventilated) for dust and water resistance, and weighs 2.1 kg with the brake. It is designed to work seamlessly with MR-J3-40A/B/T servo amplifiers, offering robust performance in packaging, robotics, and machining applications.
| Parameter | Specification (HF-KP43B) |
|---|---|
| Rated Output | 400 W |
| Rated Torque | 1.3 N·m (184 oz·in) |
| Maximum Torque (Increased) | 4.46 N·m (632 oz·in) |
| Maximum Torque (Standard) | 3.8 N·m (538 oz·in) |
| Rated Speed | 3000 r/min |
| Maximum Speed | 6000 r/min |
| Permissible Instantaneous Speed | 6900 r/min |
| Power Rate at Continuous Rated Torque | 38.6 kW/s |
| Rated Current | 2.7 A |
| Maximum Current (Increased) | 9.5 A |
| Maximum Current (Standard) | 8.1 A |
| Regenerative Braking Frequency | 249 times/min |
| With Electromagnetic Brake | Yes |
| Brake Holding Torque | 0.50 N·m (2.73 oz·in) |
| Recommended Load to Motor Inertia Ratio | 22 times maximum |
| Speed/Position Detector | 18-bit encoder (262144 p/rev) |
| Insulation Class | Class B |
| Structure | Totally enclosed non-ventilated (IP65) |
| Mass (Standard) | 1.5 kg (3.3 lb) |
| Mass (With Brake) | 2.1 kg (4.7 lb) |
| Compatible Servo Amplifier | MR-J3-40A/B/T |
| Power Supply Capacity | 0.9 kVA |

What Does Our Clients Say
Mitsubishi MR-J4
Laura Navas
Great product!
2019/12/01
Keyence sensor
EQDR SALES
Original and fast!
2020/02/22