The MITSUBISHI MELSERVO-J2S HC-KFS23B is a 200W AC servo motor engineered for demanding industrial automation tasks requiring both high dynamic response and fail-safe braking. This model features a permanent magnet synchronous motor design with a built-in electromagnetic brake, making it ideal for vertical axis applications such as elevator doors, CNC tool changers, or robotic arms where holding torque is critical. The 17-bit absolute encoder eliminates the need for homing sequences on power-up, significantly reducing machine setup time. With a rated speed of 3000 rpm and a maximum speed of 4500 rpm, the HC-KFS23B delivers smooth torque from standstill to high-speed operation, backed by a robust insulation class B and IP65 protection rating (shaft end excluded). Below is the detailed technical specification table for this servo motor.
| Parameter |
Specification |
| Model |
HC-KFS23B |
| Rated Output Power |
200 W (0.2 kW) |
| Rated Torque |
0.64 N·m |
| Maximum Torque |
1.9 N·m (300% rated torque) |
| Rated Speed |
3000 rpm |
| Maximum Speed |
4500 rpm |
| Rated Current |
1.4 A (RMS) |
| Maximum Current |
4.2 A (RMS) |
| Encoder Type |
17-bit absolute encoder (131,072 pulses/rev) |
| Brake Type |
Electromagnetic spring-set brake |
| Brake Holding Torque |
0.64 N·m (static) |
| Brake Power Supply |
24 V DC ±10%, 0.35 A |
| Brake Release Time |
20 ms (max) |
| Motor Inertia (J) |
0.17 × 10⁻⁴ kg·m² |
| Insulation Class |
Class B (130°C) |
| Protection Rating |
IP65 (shaft end and connector excluded) |
| Mass (with brake) |
1.2 kg |
| Shaft End |
Straight shaft with keyway (diameter 12 mm, length 30 mm) |
| Ambient Temperature |
0°C to +40°C (operation), -20°C to +65°C (storage) |
| Ambient Humidity |
20% to 80% RH (non-condensing) |
| Compatible Amplifier |
MR-J2S-10A (200V class) |
| Connection Type |
Standard connector (CN1, CN2, CN3 for encoder and power) |
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