MR-J4W3-444B | Mitsubishi MELSERVO MR-J4 AC Servo Drive

MR-J4W3-444B – Mitsubishi MELSERVO MR-J4 AC Servo Drive (400W / 0.4kW)

Mitsubishi MR-J4W3-444B is a compact AC servo drive. Works with 200-240Vac supply. Supports single-phase or three-phase input. Rated power: 400W (0.4kW). Rated current: 2.8A. IP20 protection. Ideal for small motion control tasks.

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Key Description – Tree Structure Overview

• Power & Input Flexibility
  • Supply voltage: 200Vac to 240Vac
  • Input types: Single-phase (2P) or three-phase (3P)
  • Rated active power: 400W / 0.4kW
  • Rated current: 2.8A
  • Current consumption (max): 7.8A
• Main Function & Compatibility
  • Main function: AC servo drive
  • Compatibility: Works with Mitsubishi servo motors
• Protection & Environment
  • Degree of protection: IP20 (dust protection for indoor use)
  • Operating temperature: 0°C to +55°C
  • Storage temperature: -20°C to +65°C

Technical Specifications – Complete Data (Tree Format)

• General Information
  • Manufacturer: Mitsubishi
  • Product Line: MELSERVO MR-J4
  • Part Number: MR-J4W3-444B
  • Type: AC servo drive
  • Weight: 5.00 lbs (2.27 kg)
• Electrical Ratings
  • Supply voltage (AC): 200Vac – 240Vac
  • Network type: Single-phase input (2P) or 3-phase input (3P)
  • Rated current: 2.8A
  • Current consumption (input): 7.8A
  • Rated active power: 400W / 0.4kW
• Function & Compatibility
  • Main function: AC servo drive
  • Compatibility: Compatible with Mitsubishi servo motors
• Environmental & Protection
  • Degree of protection: IP20
  • Ambient air temperature for operation: 0°C to +55°C
  • Ambient air temperature for storage: -20°C to +65°C

Expert Review – Manager’s Insight on MR-J4W3-444B

• Manager’s Insight: Very reliable for small automation cells. The dual input option (single or three-phase) saves installation headaches. IP20 rating works for clean indoor factories.
• Performance Opinion: Great for conveyor indexing or small pick-and-place machines. 400W is enough for light duty tasks. Easy to pair with HG series motors.
• Reliability Note: Wide storage temperature range (-20 to +65°C) helps during logistics. Good thermal design for continuous operation.

Suitable Devices & Applications

• Compatible Equipment
  • Mitsubishi HG series servomotors (50W to 400W range)
  • Mitsubishi PLCs with analog or pulse control
  • Small industrial robots and automation arms
• Application Scenarios
  • Light conveyor systems and indexing tables
  • Packaging machines (small fillers, cappers)
  • Lab automation and medical devices
  • Printing auxiliary axes and labelers
  • Assembly stations for electronics manufacturing

Purchase Guidance – What You Need to Know

• Warranty: 12 months from invoice date covers defects in materials and workmanship.
• Shipping: Dispatch within 12-24 hours after payment confirmation.
• Carriers: FedEx, UPS, DHL – express tracking provided worldwide.
• Selection Tip: Check your motor power rating. This drive is best for 400W or smaller servomotors. For single-phase input, use 2P wiring; for three-phase, use 3P.
• Ensure ambient temperature stays below 55°C. Provide proper ventilation for IP20 units.

Frequently Asked Questions (FAQ) – Expert Answers

• Can MR-J4W3-444B run on single-phase power at full 400W?
  Yes. It accepts single-phase 200-240Vac. Output power remains 400W. No derating needed.
• What type of feedback does this drive require?
  It works with Mitsubishi servo motors using incremental or absolute encoders. Match motor series for plug-and-play.
• Experience-based: Why does my drive show overcurrent alarm?
  Most common cause: wrong motor wiring or too small cable gauge. Use shielded cables and check motor phase order.
• Is this drive compatible with non-Mitsubishi motors?
  Not recommended. Parameter tuning is complex. Use Mitsubishi HG series for best results.
• What is the delivery time and warranty coverage?
  12-month warranty. Ships in 12-24 hours via FedEx/UPS/DHL. Tracking number emailed.

Buying Guide – Choose the Right AC Servo Drive

• Confirm motor power: MR-J4W3-444B is ideal for 400W servomotors.
• Check input power type: single-phase (2P) or three-phase (3P) available.
• Need IP20? This is for clean indoor use. Avoid dust and water splash.
• For multiple axes, consider MR-J4W series multi-axis drives.
• Order an external braking resistor if frequent stops are required.

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