Mitsubishi HC-KFS43 Servo Motor — 400W AC Servo for Precision Motion Control

Part Number: HC-KFS43 (also listed as HCKFS43)

Brand: Mitsubishi Electric

Rated Output: 400W

Warranty: 1 Year | Shipping: Free Expedited

What You're Getting

The HC-KFS43 is a 400-watt AC servo motor from Mitsubishi Electric's HC-KFS series — a compact, high-performance line built for demanding industrial automation environments. Whether you're running CNC machinery, semiconductor equipment, or robotic assembly cells, this motor delivers the torque consistency and positional accuracy that modern production lines depend on.

Paired with compatible MR-J2S or MR-J3 series servo amplifiers, the HC-KFS43 operates at a rated speed of 3,000 RPM with a 200V AC power supply. Its high-resolution encoder ensures tight closed-loop feedback, making it a reliable choice for applications where positional repeatability isn't negotiable.

Key Specifications

Built for Real Industrial Demands

One thing that separates the HC-KFS series from lower-tier alternatives is its build quality. The motor housing is compact without sacrificing thermal performance — Mitsubishi engineered this series for continuous-duty cycles in factory environments where heat and vibration are facts of life.

The IP65 protection rating means it handles coolant splash and dust without issue, which matters in actual shop-floor conditions. Shaft-through sealing is included as standard, not as an add-on.

Response bandwidth is another strong point. High-gain servo tuning is achievable with this motor because of its low inertia rotor design, which reduces settling time during rapid point-to-point movements. If your application involves frequent positioning cycles, that translates directly into cycle time savings.

Ideal Applications

• CNC machining centers — axis interpolation requiring smooth velocity profiles
• Pick-and-place robotics — fast, repeatable motion with minimal overshoot
• Semiconductor and electronics assembly — micron-level positioning
• Packaging and labeling equipment — high-cycle, consistent throughput
• Textile and printing machinery — coordinated multi-axis synchronization

Why Buy From Us

Every HC-KFS43 we ship comes with a full one-year warranty and free expedited shipping. Units are sourced through verified supply channels and inspected prior to dispatch. If you need technical documentation, wiring diagrams, or compatibility confirmation with your existing amplifier setup, our team can assist before or after purchase.

We stock both new and factory-refurbished units. All refurbished stock undergoes functional testing before listing.

FAQ

Q1: Is the HC-KFS43 compatible with the MR-J3 series servo amplifier?

 Yes. The HC-KFS43 is fully compatible with both MR-J2S and MR-J3 series amplifiers. Verify the connector type and encoder cable pinout match your specific amplifier revision before wiring.

Q2: What is the difference between HC-KFS43 and HCKFS43?

They are the same motor. HCKFS43 is simply an alternate formatting of the part number with hyphens removed — commonly used in database listings and catalog searches.

Q3: Can this motor be used in vertical axis (Z-axis) applications?

Yes, but a servo amplifier with dynamic braking or an external brake module is strongly recommended for vertical loads to prevent drop during power-off or E-stop conditions.

Q4: How long does expedited shipping typically take?

Most domestic orders arrive within 2–4 business days after dispatch. International lead times vary by destination. Tracking information is provided upon shipment.

Q5: Is a warranty claim process available if the unit arrives defective?

 Yes. The one-year warranty covers manufacturing defects and performance failures under normal operating conditions. Contact us with your order number and fault description — we handle replacements promptly.