Mitsubishi HC-SFS502BK Servo Motor — New In Box, Factory Sealed

5 kW | 3-Phase AC | 2000 RPM | With Electromagnetic Brake & Keyway Shaft

Looking for a genuine, unused Mitsubishi HC-SFS502BK? This listing is for a brand-new, factory-sealed unit — still in its original Mitsubishi packaging, never installed, never powered on. No refurbishing. No repackaging. Just the real thing, straight from the box.

About the HC-SFS502BK

The HC-SFS502BK belongs to Mitsubishi Electric's HC-SFS series — a line of medium-inertia AC servo motors built for demanding industrial environments. These motors have been deployed across CNC machining centers, robotic arms, automated conveyor systems, and precision assembly equipment for decades, earning a reputation that holds up under real production conditions.

At its core, this is a 5 kW, 3-phase AC servo motor rated at 2000 RPM with a continuous current draw of 26 amps. It's engineered to pair with Mitsubishi's MELSERVO amplifier families — including the MR-J2-Super and related series — delivering tight closed-loop control through a built-in high-resolution encoder.

Two features distinguish the BK variant specifically:

Built-in Electromagnetic Brake The motor includes a spring-applied electromagnetic brake. When the drive power is cut, the brake engages automatically to hold the shaft position — essential for vertical-axis applications or anywhere gravity or load inertia could cause uncontrolled movement during a stop or power loss.

Keyway Shaft The output shaft is machined with a standard keyway, allowing positive torque transmission via a key and hub rather than relying solely on shaft clamp friction. For high-load or reversing applications, this matters.

Verified Specifications

Condition & Packaging

This unit is sold exactly as received from the factory. The box is sealed, the motor is in pristine condition, and all original accessories and documentation remain intact. There's no visible wear, no connector damage, no signs of installation.

For maintenance teams doing emergency replacements or engineers building up a spare parts buffer — this is the condition you want. Drop-in replacement, zero risk of hidden prior-use issues.

Real-World Application Fit

The HC-SFS series motors aren't niche components. They're workhorse drives found in:

• CNC machine tool axes — where repeatability and stiffness under load are non-negotiable
• Industrial robots — joint drives that need reliable holding when power cycles
• Automated packaging lines — high-cycle, consistent torque demands
• Semiconductor and electronics manufacturing — precision positioning with low vibration

The 5 kW output places this motor squarely in the mid-range industrial category — powerful enough for heavy feed axes, compact enough to fit in tightly designed machine envelopes.

FAQ

Q: Which servo amplifier is compatible with the HC-SFS502BK?

A: This motor is designed for use with Mitsubishi MELSERVO amplifiers, including the MR-J2-Super series. Always cross-check the amplifier model code against your system specifications before ordering.

Q: Does the electromagnetic brake stop the motor or just hold it?

 A: It's a holding brake. It engages when power is removed to keep the shaft stationary — it's not intended for dynamic braking during normal deceleration. Using it for repeated dynamic stops will accelerate wear significantly.

Q: Is this motor new or refurbished?

A: New, factory-sealed, uninstalled. The unit ships in its original Mitsubishi box with the factory seal intact.

Q: Can this motor be used as a direct replacement for a failed HC-SFS502BK on an existing machine?

 A: Yes — provided the existing machine was originally built around this model. Verify the encoder cable, power connector pinout, and amplifier parameters before startup. Settings from the old motor's amplifier may need to be re-entered.

Q: What voltage does this motor require?

A: The HC-SFS502BK operates on a 400V, 3-phase AC supply. Confirm your local power infrastructure and amplifier input ratings match before installation.