HG-SR52 is a 0.5 kW medium-inertia AC servo motor from Mitsubishi Electric’s HG-SR series, designed to operate within the MELSERVO-J4 and MELSERVO-J5 servo amplifier ecosystems. Featuring a rated output of 500 W, a rated speed of 3,000 rpm, and a maximum torque of 2.39 N·m, the HG-SR52 delivers precise rotational control for demanding industrial motion applications. The motor integrates a 22-bit high-resolution encoder as standard, enabling sub-micron positioning accuracy in closed-loop configurations. In stock at Atlantech Drives. Request your quote within 24-48 hours with worldwide shipping and 12-month warranty.
What Is the HG-SR52?
The HG-SR52 is part of Mitsubishi Electric’s HG-SR medium-inertia servo motor series, engineered to pair directly with MR-J4 and MR-J5 series servo amplifiers. The «52» suffix in the part number denotes the 0.5 kW (500 W) power class within the series, distinguishing it from higher-output variants such as the HG-SR102 (1 kW) or HG-SR152 (1.5 kW). The motor body is constructed for flange mounting and is compatible with standard IEC and JIS motor frame dimensions. Its medium-inertia rotor design makes it particularly suitable for applications requiring a balance between rapid acceleration and stable load handling, such as conveyor indexing, pick-and-place systems, and multi-axis machine tools.
Key Technical Specifications
- Rated Output Power: 500 W (0.5 kW)
- Rated Speed: 3,000 rpm
- Maximum Speed: 6,000 rpm
- Rated Torque: 1.59 N·m
- Maximum Torque: 4.77 N·m (instantaneous peak) — please verify this value against the official Mitsubishi HG-SR series datasheet before use in critical sizing calculations
- Encoder Resolution: 22-bit absolute encoder (4,194,304 pulses/rev)
- Insulation Class: Class F
- IP Rating: IP65 (shaft seal and connector end)
- Operating Ambient Temperature: 0 °C to 40 °C
- Vibration Resistance: 49 m/s² (5G)
- Motor Series: HG-SR (Medium Inertia)
- Compatible Amplifiers: MR-J4-10A to MR-J4-70A / MR-J5-G series equivalents
Compatibility & System Integration
The HG-SR52 is designed to operate exclusively with Mitsubishi Electric MELSERVO servo amplifiers. Its primary compatible amplifier is the MR-J4-10A through MR-J4-70A range (depending on wiring configuration), as well as corresponding MR-J5 amplifiers. The motor connector pinout and encoder interface are standardised across the HG-SR series, which means the HG-SR52 can be substituted with other HG-SR variants without rewiring the amplifier side — a significant advantage during machine upgrades or capacity changes. The 22-bit encoder communicates via Mitsubishi’s SSCNET III/H (Serial Synchronous Communication Network) when paired with a compatible J4 or J5 amplifier, enabling high-speed, noise-immune encoder signal transmission across multi-axis architectures. For multi-axis systems using the MR-J4W or MR-J5W multi-axis amplifiers, the HG-SR52 can be integrated into configurations of up to three axes per amplifier unit, reducing cabinet footprint and wiring complexity. It is also compatible with Mitsubishi’s Safety Sub-Function modules (MR-D30) for STO (Safe Torque Off) and SS1 (Safe Stop 1) compliance under IEC 62061 and ISO 13849-1.
Expert Tips for HG-SR52 Selection and Commissioning
When selecting the HG-SR52 for a new machine design, verify that the load-to-rotor inertia ratio does not exceed 30:1 as recommended by Mitsubishi Electric for the medium-inertia series — exceeding this ratio can cause oscillation during rapid reversals even with aggressive gain tuning. Use MR Configurator2 to run the One-Touch Tuning function on first commissioning; this automatically sets the servo gain parameters appropriate for the HG-SR52’s rotor inertia class. If the motor will be installed vertically (shaft pointing downward), confirm that a holding brake variant is specified — the standard HG-SR52 does not include an integrated brake. For cable routing, maintain the encoder cable (MR-J3ENSCBL□M-A/B-L or equivalent) away from power cables carrying switching frequency noise from the inverter output. Always ground the motor frame to the machine chassis at a single point to avoid ground loop interference with the encoder signal. When replacing an older HC-SFS52 motor with an HG-SR52, note that the shaft diameter and key dimensions are identical but the encoder connector differs — use Mitsubishi’s conversion cable set to avoid encoder wiring errors.
Frequently Asked Questions
Q: Is the HG-SR52 compatible with the older MR-J3 amplifier series?
A: No. The HG-SR52 uses a 22-bit absolute encoder interface that is not backward compatible with MR-J3 amplifiers, which use a different encoder protocol. For MR-J3 systems, the correct motor is the HC-SFS52 or HC-RFS52 depending on the inertia class required. If you are upgrading from J3 to J4 amplifiers, the HG-SR52 can replace the HC-SFS52 directly with the appropriate encoder cable adapter.
Q: Can the HG-SR52 be used without a battery for absolute position retention?
A: The 22-bit encoder in the HG-SR52 is an absolute multi-turn encoder that requires a battery backup (MR-BAT6V1SET or equivalent) connected to the amplifier in order to retain multi-turn position data when the drive is powered off. Without the battery, the encoder will still power up correctly, but the controller will request a home position reference on every power cycle, functioning effectively as an incremental system.
Q: What is the shelf life and storage requirement for HG-SR52 units held in spare parts inventory?
A: Mitsubishi Electric specifies a maximum storage period of 3 years for servo motors stored in conditions of 0–55 °C and 90% RH or less without condensation. After extended storage, it is recommended to run the motor unloaded at low speed for 30 minutes before returning it to service, to redistribute bearing grease and verify encoder integrity prior to full-load operation.
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