Mitsubishi HS-MF23-S2A Servo Motor

The Mitsubishi HS-MF23-S2A (also referenced as HSMF23S2A) is a high‑performance AC servo motor from the MELSERVO J4 series. It is rated at 200W (0.2 kW) with a rated speed of 3000 rpm and a rated torque of 0.64 Nm. The motor features a 17‑bit absolute encoder (131,072 pulses/revolution) and is designed for precise positioning and speed control in industrial automation.

Mechanical Specifications

• Rated output: 200 W (0.2 kW).

• Rated torque: 0.64 Nm (6.5 kgf·cm).

• Maximum torque: 2.23 Nm (23 kgf·cm).

• Rated speed: 3000 rpm.

• Maximum speed: 6000 rpm.

• Rotor inertia: 0.29 kg·cm² (0.000029 kg·m²).

• Permissible load inertia: up to 10 times rotor inertia.

Encoder and Feedback

The motor is equipped with a 17‑bit high-resolution absolute encoder (serial communication, Mitsubishi protocol). It provides 131,072 pulses per revolution, allowing smooth operation at low speeds. The encoder retains position information even when power is off (battery backup required on the drive). The absolute system eliminates the need for a home search on power-up.

Electrical Data

Power supply: 3-phase 200–230V AC (50/60 Hz) or single-phase 200–230V AC (when used with suitable drive). Rated current: 1.4 A (rms). Maximum current: 4.2 A. Insulation class: F (155°C). The motor has a continuous duty rating (S1).

Connector and Cable

The motor comes with two connectors: a power connector (MR‑PWR) and an encoder connector (MR‑ENC). Standard cable length for factory wiring is up to 20 meters. For longer runs (up to 50 m), a shielded cable with ferrite cores is recommended. The motor frame size is 60 mm square (flange dimensions). Shaft diameter: 8 mm with keyway (metric).

Environmental and Mounting

Protection class: IP65 (dust-tight and protected against water jets). Operating temperature: 0 to 40°C (derate above 30°C for high duty). Storage: -20 to 65°C. Humidity: 20% to 80% non-condensing. Vibration: 4.9 m/s² (0.5 G) maximum. Mounting orientation: any (horizontal or vertical). The motor is compliant with CE and UL.

Compatible Drives

This motor is designed to work with Mitsubishi MELSERVO J4 series drives: MR‑J4‑10A (single-phase) or MR‑J4‑10B (three‑phase). It can also be used with J3 series drives with some parameter adjustments. The drive provides full closed-loop control, auto-tuning, and vibration suppression.

Brake Option

The HS-MF23-S2A does not include a built-in brake (suffix “-S2A” indicates standard shaft without brake). For applications requiring holding brake, specify HS-MF23-S2B. The brake (if added externally) is 24V DC, 0.35 A, with a holding torque of 2.0 Nm.

Typical Applications

Used in pick-and-place robots, PCB assembly machines, labeling equipment, and small CNC machines. The 200W rating is suitable for light payloads and high-speed indexing.

Ordering and Documentation

Part number: HS-MF23-S2A (HSMF23S2A). The motor is supplied with a 0.5m pigtail cable (power and encoder) and a key. Manual: MELSERVO J4 Series Servo Motor Instruction Manual (IB-0300275). RoHS compliant.