Mitsubishi Servo Motor HC-SFS1524 HCSFS1524

Mitsubishi HC-SFS1524 (HCSFS1524) — 1.5kW, 400V Class AC Servo Motor, 2000 rpm, Straight Shaft, MELSERVO J2-Super Series

Product Overview

Part Number: HC-SFS1524

Also Searched As: HCSFS1524, HC SFS 1524, HC-SFS-1524

Series: Mitsubishi MELSERVO HC-SFS (J2-Super Generation) Classification: Medium-Inertia AC Brushless Servo Motor — 1.5 kW, 400V class, 2000 rpm, Straight Shaft, No Brake

What Sets This Motor Apart

Most of the HC-SFS series runs on 200V AC — the standard voltage class for Japanese-origin servo platforms. The HC-SFS1524 is the 400V version of that same 1.5kW, 2000 rpm motor. Same mechanical envelope, same 17-bit absolute encoder, same 130 × 130 mm flange, same IP65 rating — but wound for 400V class operation and paired with a 400V class MR-J2S-200_4 amplifier.

The practical significance is straightforward: factories and machine builders operating on European or international 400V AC infrastructure no longer need a transformer to run Mitsubishi J2-Super servo drives. The HC-SFS1524 connects directly to the local supply. Panel design is simpler, the transformer's losses and footprint disappear, and the full 1.5kW is available at the motor shaft without conversion overhead.

The motor itself is mechanically and dynamically identical to its 200V counterpart. Rated torque of 7.16 Nm, peak torque of 21.6 Nm, rotor inertia of 0.002 kg·m², and a 17-bit serial absolute encoder at 131,072 ppr — all the same. The "4" suffix in the part number is entirely a power supply designator. For an engineer specifying a servo system for a 400V line, the HC-SFS1524 is the HC-SFS series entry point at 1.5kW.

Technical Specifications

The 400V Question: When the Suffix Matters More Than Anything Else

Servo motor selection guides generally walk through power, speed, torque, and encoder resolution. Voltage class tends to get less attention because, within a single factory, it is usually a fixed constraint — the supply is what it is, and every motor in the building runs at the same voltage. That makes the HC-SFS1524 an uncomplicated choice for 400V facilities: it is simply the correct motor.

The complication arises when machines designed for one voltage class are re-exported or relocated. A Japanese-market machine built with HC-SFS152 (200V) units being retrofitted for a European production line needs either a transformer at each drive or a direct motor swap to 400V-class equivalents. The HC-SFS1524 is that direct swap — mechanically identical to the HC-SFS152, wired differently inside the motor and paired with a different amplifier, but otherwise interchangeable without any modification to the machine structure, coupling arrangement, or cable routing.

The amplifier swap is straightforward: MR-J2S-200A / B / CP becomes MR-J2S-200A4 / B4 / CP4. The encoder cable and motor power cable connectors are the same. The parameter configuration carries over directly. For machine builders standardising on a single servo platform across facilities with different supply voltages, the 200V / 400V pairing within the HC-SFS range makes that possible without maintaining two separate mechanical designs.

One caveat worth flagging explicitly: the MR-J2S-200A4 is a 400V class amplifier and must not be connected to a 200V supply. The "4" suffix on both motor and amplifier must match. Mixing voltage classes in this platform is not a recoverable operating error — it is a hardware failure.

Torque Performance at 2000 rpm

Seven point one six Newton-metres continuous at 2,000 rpm is a well-balanced operating point for mid-range industrial servo axes. It is enough torque to drive a 10mm pitch ball-screw at moderate speed, run a medium-weight conveyor section, provide the input to a gear-driven rotary indexing table, or operate a winding tension drive with reasonable working diameter range.

The 21.6 Nm peak — exactly three times the continuous rating — handles the acceleration and deceleration phases of positioning cycles. For an axis moving a typical 130 × 130 mm-class load through a short point-to-point move and back, the peak torque is available for the first and last portions of the trajectory while the thermal budget remains intact during the constant-velocity phase. The J2-Super amplifier monitors this via its built-in electronic thermal model and will alarm before the motor windings reach a damaging temperature under any operating cycle.

Rotor inertia of 0.002 kg·m² keeps the motor's own angular momentum low relative to the torque output. Practical rule of thumb for J2-Super medium-inertia motors: load inertia reflected to the motor shaft should be kept to roughly 10 times the rotor inertia or less for good dynamic response. At 0.002 kg·m², that means a 0.02 kg·m² reflected load inertia ceiling for standard operation. If the application requires a higher load inertia ratio, the J2-Super auto-tuning can compensate to some extent, but the mechanical design should aim to stay within this envelope.

Straight Shaft and No Brake: Application Fit

The HC-SFS1524 comes with a straight, keyway-free shaft and no electromagnetic brake. This combination is appropriate for the majority of servo axes in its capacity class.

Straight shaft. Precision servo couplings, flexible disc couplings, and taper-lock or shrink-disc hubs for timing pulleys all clamp directly to a smooth shaft OD. At 1.5kW and 7.16 Nm continuous torque, friction-clamp couplings on a clean straight shaft handle the full torque range including peaks without slipping. The coupling selection should be made with the 21.6 Nm peak in mind, not just the continuous figure — a coupling sized for rated torque only will be marginal during acceleration.

The HC-SFS1524K adds a machined keyway for applications where a keyed hub is required — chain sprockets, gear hubs, and timing pulleys with keyway bores. Performance is otherwise identical. Both variants use the same MR-J2S-200_4 amplifier.

No brake. Servo lock through the amplifier's closed position loop is sufficient for horizontal axes and any mechanism where no net gravitational or spring force acts in the direction of shaft rotation when the servo is in hold state. The HC-SFS1524 covers all of those applications cleanly and without the additional wiring and relay circuit a brake requires.

For vertical axes, inclined feeds, gravity-loaded mechanisms, or any drive where axis movement at servo-off would create a hazard, the correct motor is the HC-SFS1524B (straight shaft, spring-applied electromagnetic brake) or HC-SFS1524BK (keyed shaft, brake). Within a multi-axis machine, sorting the axes by whether they genuinely need a mechanical brake and specifying accordingly produces a simpler panel and lower ongoing maintenance load.

Compatible Amplifiers

The HC-SFS1524 requires a 400V class MR-J2S-200 amplifier. There are three variants, each representing a different control architecture:

MR-J2S-200A4 — General-purpose interface. Accepts pulse-train position commands from CNC controllers or PLCs, plus analog speed and torque references. Supports position, speed, and torque control modes and all switched-mode combinations (P/S, S/T, T/P). RS-232C connection for MR Configurator setup software. The standard choice for machine tool and general automation axes where the command source is an external controller.

MR-J2S-200B4 — SSCNET bus interface. Connects to Mitsubishi A-series and Q-series motion controllers via fiber-optic SSCNET serial link. Position commands travel over the network; encoder feedback returns through the same fiber. All absolute position, alarm, and monitoring data is available to the controller without separate wiring. The correct amplifier for coordinated multi-axis systems under a Mitsubishi motion controller.

MR-J2S-200CP4 — Built-in positioning. Up to 31 target positions stored in internal point tables, activated by digital I/O or CC-Link network command. No external motion controller needed. Suited to standalone indexed or point-to-point axes where a full network controller is not required.

All three amplifiers support the MR-J2S-200_4's built-in dynamic brake, real-time auto-tuning, adaptive vibration suppression, and the full suite of J2-Super diagnostic and monitoring functions.