The HG-SR202 is a 2.0 kW medium-inertia AC servo motor from Mitsubishi Electric’s MELSERVO-J4 series, engineered for demanding industrial applications requiring substantial torque output at moderate speeds — including injection moulding machinery, large-format packaging lines, metal cutting machine tools, and heavy-duty conveyor drive systems. The «HG-SR» designation identifies the medium-inertia rotor construction balanced for torque capacity and acceleration response, while «202» denotes the 2 kW rated output at 2000 rpm rated speed (note: the HG-SR series runs at 2000 rpm rated, distinct from the 3000 rpm HG-MR low-inertia series). In stock at Atlantech Drives. Request your quote within 24-48 hours with worldwide shipping and 12-month warranty.
What Is the HG-SR202?
The HG-SR202 occupies a key position in Mitsubishi’s MELSERVO-J4 medium-inertia family, which spans from 500 W (HG-SR52) through 7 kW (HG-SR702) at the 2000 rpm speed rating. Medium-inertia motors are the default choice for applications where the reflected load inertia is high relative to the motor — typical of ball-screw-driven axes, large rotary tables, and direct-coupled high-torque loads. Unlike the low-inertia HG-MR family optimised for rapid point-to-point moves with light loads, the HG-SR202’s higher rotor inertia (12.5×10⁻⁴ kg·m²) provides inherent stability when driving heavier, inertia-matched loads and reduces the sensitivity to load inertia variations during a motion profile. At 2 kW, the HG-SR202 is positioned between the 1 kW HG-SR102 (for medium-duty indexing) and the 3.5 kW HG-SR352 (for heavy machining centre spindles and large press applications). The standard shaft is straight with key; the motor is supplied without a holding brake as standard, with the brake-equipped equivalent designated HG-SR202B.
Key Technical Specifications
- Rated Output: 2000 W (2.0 kW)
- Rated Speed: 2000 rpm
- Maximum Speed: 3000 rpm
- Rated Torque: 9.55 N·m
- Maximum Torque: 28.6 N·m (300% of rated)
- Rated Current: 11.0 A
- Rotor Inertia: 12.5×10⁻⁴ kg·m² (without brake)
- Encoder: 22-bit absolute/incremental serial encoder
- Insulation Class: F
- Protection Rating: IP67 (shaft-through portion excluded)
- Compatible Amplifier: MR-J4-200A / MR-J4-200B / MR-J4-200GF
- Operating Ambient: 0 °C to +40 °C, 80% RH max (non-condensing)
- Cooling: Natural air cooling (IC410)
- Weight: Approx. 13.5 kg
Typical Industrial Applications
The HG-SR202 is commonly deployed in injection moulding machine clamp and ejector axes where its medium-inertia construction provides stable torque delivery under varying mould load conditions. In CNC machine tool applications, the motor drives ball-screw feed axes on medium-to-large machining centres (axis travel typically 1-2 m) where the 9.55 N·m rated torque provides adequate cutting force capacity without oversizing. Large-format printing and corrugated packaging lines use the HG-SR202 for main drive rolls and cutter shafts, benefiting from the IP67 rating in paper-dust environments. For food and beverage filling machinery, the HG-SR202 drives rotary turret indexers where the motor’s high torque at low speed eliminates the need for intermediate gearing in many designs. In textile machinery, the motor is specified for warp beam drives and take-up rollers where continuous medium-speed operation under variable load is required.
Troubleshooting Guide
Troubleshooting tip: if the HG-SR202 exhibits audible vibration or torque ripple during constant-velocity operation, first check the mechanical load-to-motor inertia ratio: the MR-J4 amplifier’s auto-tuning algorithm is optimised for load ratios between 1:1 and 10:1 for medium-inertia motors. Ratios outside this range require manual gain adjustment via parameter PA08 (auto-tuning response) and PA09 (auto-tuning speed loop gain). For alarm AL.50 (overload 1) or AL.51 (overload 2) during acceleration, verify that the programmed acceleration time is consistent with the load inertia — the MR Configurator2 software can calculate the required acceleration torque and compare it against the motor’s maximum torque envelope. For encoder-related alarms (AL.16, AL.17, AL.20), inspect the encoder cable at the motor-side connector for moisture ingress; the IP67 rating applies only with the connector fully seated and the boot properly fitted. If the motor runs hot to touch (stator casing exceeding 90 °C) under nominal load, verify the mounting surface is acting as an effective heat sink — the HG-SR202 is rated for natural cooling but requires metallic flange mounting to dissipate rated losses; isolating mounts or plastic bulkheads will cause thermal derating.
Frequently Asked Questions
Q: Can the HG-SR202 be operated above its 2000 rpm rated speed?
A: Yes, up to the maximum speed of 3000 rpm, but with reduced continuous torque capacity. The torque-speed curve shows continuous torque dropping progressively above rated speed; at 3000 rpm the motor can deliver approximately 60% of rated torque continuously. For intermittent operation, the full 28.6 N·m peak torque is available up to approximately 2500 rpm before the amplifier’s voltage limit begins to reduce peak torque capability.
Q: What is the mounting flange dimension for the HG-SR202?
A: The HG-SR202 uses a 130 mm square flange (B-flange mounting, IEC standard) with a 110 mm PCD bolt pattern and 95 mm spigot. This is compatible with IEC 72-1 frame size equivalents. The shaft diameter is 24 mm with a 4 mm keyway on the standard shaft variant. For non-standard mounting arrangements (face flange, foot mount), consult Mitsubishi’s dimensional drawings before ordering as mounting configuration is determined at factory and not field-convertible.
Q: Is a filter or reactor required between the MR-J4-200 amplifier and the HG-SR202?
A: No output filter or reactor is required between the amplifier and motor for cable lengths up to 30 m using Mitsubishi-supplied motor cables. For longer runs (30-50 m) or when using non-Mitsubishi shielded cables, an output dV/dt filter is recommended to prevent voltage spikes from degrading the motor’s insulation system over time. Do not install an input line reactor on the amplifier’s motor-side terminals — input reactors are for the mains supply only.
Do you need more references from this brand? Explore our full catalog of Mitsubishi here: https://atlantechdrives.com/manufacturers/mitsubishi/
