Mitsubishi HC-SFS502K-S2 AC Servo Motor
5kW High-Capacity Keyed Shaft Servo Motor for demanding industrial applications requiring substantial power and precision.
Powerful Performance for Heavy-Duty Applications
The Mitsubishi HC-SFS502K-S2 is engineered for applications where standard servo motors lack sufficient power. This 5 kW (5,000W) AC brushless rotary servo motor from the MELSERVO J2S series delivers exceptional performance for medium-inertia, medium-capacity axis applications requiring continuous high torque and precise positioning.
Key Features
- 5 kW rated output with 23.9 Nm continuous torque
- Peak torque capability of 71.7 Nm for demanding applications
- 2,000 RPM rated and maximum speed
- 17-bit absolute encoder (131,072 ppr resolution)
- Keyed output shaft for secure torque transmission
- IP65 protection rating for dust and water jet resistance
- Integrated oil seal for enhanced protection
- 200V AC class, 3-phase supply with 26A rated current
Technical Specifications
| Parameter |
Value |
| Rated Output |
5,000W (5.0 kW) |
| Rated Speed |
2,000 RPM |
| Maximum Speed |
2,000 RPM |
| Rated Torque |
23.9 Nm |
| Maximum Torque |
71.7 Nm |
| Rated Current |
26 A |
| Supply Voltage |
200V AC class, 3-phase |
| Encoder Type |
Built-in absolute, 17-bit |
| Encoder Resolution |
131,072 ppr |
| Shaft Type |
Keyed shaft |
| Oil Seal |
Included |
| Flange Size |
176 × 176 mm |
| Protection Rating |
IP65 |
| Inertia Class |
Medium inertia / medium capacity |
| Motor Series |
HC-SF / HC-SFS, MELSERVO J2S |
| Compatible Drives |
MR-J2S series (500-class amplifier) |
| Ambient Operating Temperature |
0 to +40°C |
Engineering Advantages
The medium-inertia design provides optimal balance between dynamic responsiveness and torque capacity. The 17-bit absolute encoder eliminates homing routines after power cycles when used with battery backup, while the keyed shaft ensures reliable torque transmission without slip at high loads.
Typical Applications
- Heavy-duty CNC machining center feed axes
- Large rotary tables and indexers
- Industrial robot joint drives for large payload arms
- Winding and tension control systems
- Press and stamping machinery feed axes
Drive Compatibility
This motor pairs with the MR-J2S-500A/B servo amplifier. For new system designs, Mitsubishi's current equivalent is the HG-SR502K from the J4 series, featuring a 22-bit absolute encoder and IP67 protection.
Frequently Asked Questions
What amplifier does the HC-SFS502K-S2 require?
This motor is designed for the MR-J2S-500 series servo amplifier (A, B, or CP type). The 17-bit absolute encoder communicates via the J2S serial protocol. Pairing with MR-J3 or MR-J4 amplifiers requires a renewal kit or complete system upgrade.
What does the S2 suffix mean on this motor?
The S2 designates a special specification variant, which may involve differences in connector orientation, cable outlet direction, shaft dimensions, or environmental modifications. Verify specific S2 configuration against original parts documentation.
Why does this motor include an oil seal?
The integrated oil seal protects motor internals against oil mist, coolant splash, and lubrication ingress from gearboxes or adjacent components, providing additional protection at the shaft penetration point.
Is the HC-SFS502K-S2 compatible with absolute position detection?
Yes. The 17-bit absolute encoder supports absolute position detection when the MR-J2S servo amplifier is fitted with a backup battery unit, eliminating the need for zero-return homing after controlled shutdowns.
What is the modern replacement for the HC-SFS502K-S2?
Mitsubishi's current equivalent is the HG-SR502K from the MELSERVO J4 series, featuring 5 kW output, 2,000 RPM speed, 23.9 Nm rated torque, 22-bit absolute encoder, and IP67 protection.
The Mitsubishi HC-SFS502K-S2 is designed for MELSERVO J2S systems. Confirm amplifier compatibility, shaft configuration, and S2 special specification details against your machine documentation before ordering.
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