Mitsubishi HC-MFS13G1 AC Servo Motor
HC-MFS Series 100W Geared Servo Motor
Compact Design with Precision Output
The Mitsubishi HC-MFS13G1 is a compact, low-power servo motor engineered for exacting positioning tasks in CNC and robotic systems. This motor maintains tight speed control at low RPM, delivers repeatable torque without hunting, and fits into confined axis assemblies where space is limited.
Built on the HC-MFS series platform from Mitsubishi's MELSERVO J2S lineup, this 100W (0.1 kW) AC brushless servo motor features an integrated reduction gearhead. The base motor operates at 3,000 RPM with a rated torque of 0.32 Nm.
The integrated gearhead multiplies output torque while reducing shaft speed proportionally, making the G1 variant ideal for applications requiring controlled, high-torque rotation at lower speeds. The 17-bit absolute encoder provides 131,072 pulses per revolution feedback resolution, enabling precise, repeatable motion control.
Technical Specifications
| Parameter |
Value |
| Rated Output |
100W (0.1 kW) |
| Base Motor Rated Speed |
3,000 RPM |
| Rated Torque (Motor) |
0.32 Nm |
| Rated Current |
0.85 A |
| Supply Voltage |
3-phase, 200V class (105V rated) |
| Encoder Type |
17-bit Absolute |
| Encoder Resolution |
131,072 ppr |
| Gearhead Configuration |
Integrated reduction gear |
| Motor Series |
HC-MFS (Medium inertia, small capacity) |
| Cooling Method |
Natural convection |
| Protection Rating |
IP65 |
| Compatible Servo Amplifiers |
MR-J2S series |
| Ambient Operating Temperature |
0 to +40°C |
Integrated Gearhead Advantages
The integrated reduction gearhead serves as a torque multiplier - as output shaft speed decreases, available torque increases proportionally. This factory-built integration maintains compact dimensions, eliminates potential misalignment issues from field-coupled reducers, and simplifies installation in space-constrained machine axis housings.
The HC-MFS series features medium-inertia characteristics, providing predictable dynamic response across the speed range. This balanced performance makes it suitable for robotic joint axes, X-Y table drives, indexing tables, and small feed axis applications where smooth velocity tracking is essential.
Drive Compatibility and System Integration
The HC-MFS13G1 is designed for use with MR-J2S series servo amplifiers. The 17-bit absolute encoder communicates natively with MR-J2S drives, supporting absolute position retention through power cycles when a backup battery is installed.
Note: The HC-MFS series has been discontinued by Mitsubishi and succeeded by newer HF and HG series motors. For retrofit and replacement applications on existing MR-J2S-controlled machines, the HC-MFS13G1 remains the correct compatible part.
Application Environments
The IP65 rating provides full dust exclusion and resistance to directed water jets, making it suitable for most enclosed CNC and automation environments. Natural convection cooling eliminates cooling fan maintenance, reducing potential failure points in heavily cycled applications.
Typical applications include semiconductor handling equipment, medical device assembly, small-format CNC routing, and robotic assembly cells where compact servo axes are stacked in tight configurations.
Frequently Asked Questions
What servo amplifier does the HC-MFS13G1 require?
This motor is designed for use with Mitsubishi MR-J2S series servo amplifiers. The 17-bit absolute encoder communicates directly with MR-J2S drives and is not natively compatible with MR-J3 or MR-J4 amplifiers without conversion interfaces.
What is the purpose of the "G1" designation?
The G1 suffix indicates an integrated precision reduction gearhead that reduces output shaft speed while multiplying available torque. This makes the motor suitable for applications requiring high torque at lower output speeds without external reducers.
Is the HC-MFS13G1 still in production?
No. The HC-MFS series has been discontinued by Mitsubishi Electric. For new system designs, Mitsubishi's current HF and HG series motors are recommended. For maintenance and replacement on existing MR-J2S-controlled machines, genuine HC-MFS13G1 units remain available through industrial distributors.
Does this motor include an electromagnetic brake?
No. The standard G1 variant does not include a built-in brake. For vertical axis applications requiring power-off position holding, a brake-equipped variant (designated with a "B" suffix) would be required.
Can the HC-MFS13G1 replace an HC-MFS13 (without gear) in an existing machine?
Not as a direct drop-in replacement. The integrated gearhead changes output shaft speed, torque, and physical dimensions. Swapping variants requires mechanical changes to couplings, load inertia recalculations, and servo parameter adjustments.
The Mitsubishi HC-MFS13G1 is a discontinued model. Verify drive compatibility, mechanical fit, and encoder parameters with your existing system specifications before sourcing a replacement.
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