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Mitsubishi MR-J4-40B-RJ Servo Amplifier for industrial automation

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Mitsubishi MR-J4-40B-RJ

by Mitsubishi Electric

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OverviewUpgrade your industrial automation capabilities with the Mitsubishi MR-J4-40B-RJ servo amplifier, a 400W unit from the acclaimed MR-J4 Series. This amplifier is engineered for outstanding precision and dependability, forming the foundation of advanced motion control applications. Its seamless integration via SSCNET III/H communication and integrated safety features ensure efficient and secure operation even in the most challenging industrial environments. Designed to operate in harmony with Mitsubishi servo motors and motion controllers, the MR-J4-40B-RJ guarantees superior performance and a streamlined system architecture. This solution is ideal for businesses prioritizing high-speed responsiveness and unparalleled accuracy in their manufacturing processes, leading to consistent quality and reduced downtime.Key Features Consistent 400W Power Output: Provides robust power for demanding applications. Flexible Power Input: Compatible with 3-phase 200–240V AC power supplies. Rapid Communication Interface: Features SSCNET III/H for incredibly quick and dependable data exchange. Effortless Network Integration: Includes an integrated RJ45 Ethernet port for direct system connectivity. Enhanced Performance Optimization: Boasts advanced vibration suppression and auto-tuning capabilities for peak operational efficiency. Embedded Safety Protocols: Incorporates STO (Safe Torque Off) functionality, adhering to rigorous safety benchmarks. Extensive Compatibility: Fully compatible with Mitsubishi HG/LM series servo motors, allowing for adaptable system designs. Space-Saving Design: Its compact dimensions enable simple panel installation, maximizing cabinet space. Technical Specifications Model: MR-J4-40B-RJ Series: MR-J4 Rated Capacity: 400W Rated Output Current: 2.8A Power Supply: 3-phase 200–240V AC (50/60Hz) Communication: SSCNET III/H, RJ45 Control Mode: Position, speed, torque Feedback: Absolute/incremental encoder support Ambient Temperature: 0–55°C Cooling: Forced air Mounting: Panel (vertical) Weight: Approximately 1.3 kg Safety: STO (IEC/EN 61800-5-2 compliant) ApplicationsThe Mitsubishi MR-J4-40B-RJ servo amplifier is a crucial component across numerous industrial sectors that demand exceptional motion control: Precision Packaging and Labeling: Ensures accurate and high-speed operations for improved production efficiency. Robotics and Automated Handling: Delivers essential precision and responsiveness for intricate robotic movements. High-Speed Assembly Operations: Guarantees swift and reliable performance in automated assembly lines. Semiconductor and Electronics Manufacturing: Meets rigorous requirements for micrometer-level positioning and control in delicate processes. CNC and Machine Tool Automation: Provides the necessary accuracy and dynamic control for superior machining outcomes. Why Choose This Model?The Mitsubishi MR-J4-40B-RJ is an excellent choice for several compelling reasons: Superior Accuracy: Achieves highly precise control through its advanced tuning and vibration suppression features, resulting in outstanding output quality. Lightning-Fast Communication: Utilizes SSCNET III/H and Ethernet for rapid and stable communication, vital for real-time control. Optimized for Space: Its compact footprint substantially reduces required cabinet space, offering greater versatility in system layouts. Certified Safety: Complies with strict industrial safety standards through integrated STO functionality, safeguarding operators and equipment. Mitsubishi

🇺🇸 Ships from our Florida warehouse
1-Year PALM Parts Warranty
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$681.99
20 in stock

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PRODUCT DETAILS

Mitsubishi MR-J4-40B-RJ

Overview

This is a genuine Mitsubishi Electric component from the Servo Drives & Motors family. PalmPartsSolution stocks it in new, refurbished, and surplus condition with tested warranty and same-day shipping on in-stock units.

Whether you are sourcing a like-for-like replacement for an existing installation, an emergency spare to keep a line running, or a qualified part for a new build, our team can confirm availability, revision, and lead time before you order.

Key Features

  • Genuine Mitsubishi Electric catalog part
  • Tested before shipment
  • Backed by PalmPartsSolution warranty
  • Cross-reference and revision assistance available
  • Compatible with the broader Mitsubishi Electric automation ecosystem
  • Engineered to integrate inside Servo Drives & Motors installations

Compatibility

When ordering, match the full catalog/part number, hardware revision, and firmware revision called out by your Mitsubishi Electric equipment. Where applicable, confirm:

  • Input/output voltage and current rating
  • Communication protocol and network role
  • Mounting form factor and footprint
  • Operating temperature, humidity, and IP rating
  • Required certifications (UL, CE, ATEX, marine, etc.)

Not sure which revision you need? Send us the catalog number on the nameplate and we will confirm the correct match.

Replacement Information

Three ways to source this part through PalmPartsSolution:

  1. Exact replacement — same Mitsubishi Electric catalog number, new or refurbished, tested and warrantied
  2. Form-fit-function equivalent — alternate revision or build that drops in without code changes
  3. Engineered migration — current-generation Mitsubishi Electric platform with documented conversion notes for the Servo Drives & Motors family

Contact our engineering team if you need help choosing between these tracks.

Technical Specifications

  • Model: MR-J4-40B-RJ
  • Series: MR-J4
  • Rated Capacity: 400W
  • Rated Output Current: 2.8A
  • Power Supply: 3-phase 200–240V AC (50/60Hz)
  • Communication: SSCNET III/H, RJ45
  • Control Mode: Position, speed, torque
  • Feedback: Absolute/incremental encoder support
  • Ambient Temperature: 0–55°C
  • Cooling: Forced air
  • Mounting: Panel (vertical)
  • Weight: Approximately 1.3 kg
  • Safety: STO (IEC/EN 61800-5-2 compliant)

Applications

The Mitsubishi MR-J4-40B-RJ servo amplifier is a crucial component across numerous industrial sectors that demand exceptional motion control:

  • Precision Packaging and Labeling: Ensures accurate and high-speed operations for improved production efficiency.
  • Robotics and Automated Handling: Delivers essential precision and responsiveness for intricate robotic movements.
  • High-Speed Assembly Operations: Guarantees swift and reliable performance in automated assembly lines.
  • Semiconductor and Electronics Manufacturing: Meets rigorous requirements for micrometer-level positioning and control in delicate processes.
  • CNC and Machine Tool Automation: Provides the necessary accuracy and dynamic control for superior machining outcomes.

Why Choose the MR-J4-40B-RJ?

The Mitsubishi MR-J4-40B-RJ is an excellent choice for several compelling reasons:

  • Superior Accuracy: Achieves highly precise control through its advanced tuning and vibration suppression features, resulting in outstanding output quality.
  • Lightning-Fast Communication: Utilizes SSCNET III/H and Ethernet for rapid and stable communication, vital for real-time control.
  • Optimized for Space: Its compact footprint substantially reduces required cabinet space, offering greater versatility in system layouts.
  • Certified Safety: Complies with strict industrial safety standards through integrated STO functionality, safeguarding operators and equipment.
  • Mitsubishi

Availability & Shipping

  • In stock: MR-J4-40B-RJ ready for immediate dispatch from our Florida warehouse.
  • Free USA shipping: FedEx Priority (2–5 business days) and UPS Ground (3–5 business days). Expedited options available at checkout.
  • Worldwide delivery: FedEx International Priority (1–5 days), UPS International Priority (3–5 days), and USPS International (5–10 days) — rates calculated at checkout.
  • Bulk pricing: Volume discounts on request — contact our sales team for quantity quotes.
  • Buy with confidence: Every MR-J4-40B-RJ ships with a 1-Year PALM Parts warranty and a 30-day return window.
SUPPORT

Frequently Asked Questions — Mitsubishi Electric

Yes. Every MR-J4-40B-RJ we ship is sourced through trusted industrial channels and inspected before dispatch. PALM Parts Solution operates as an independent supplier, not an authorized distributor.

Machine down? We ship parts the same day.

New, surplus, and refurbished Mitsubishi Electric inventory in stock. Request a quote or speak directly with an automation specialist for emergency sourcing.

CUSTOMER REVIEWS

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Independent Supplier Notice

PALM Parts Solution operates as an independent industrial automation supplier and is not an authorized distributor or affiliate of any listed manufacturer or brand name. Manufacturer trademarks and product names are used solely for identification purposes. Original manufacturer warranties do not apply. All products sold by PALM Parts are backed by our own 1-year warranty.

Product Condition & Firmware

All products are sold as new unless stated otherwise. Original manufacturer packaging may show signs of handling, storage, or shelf wear. Date codes and series may vary from current factory production. PALM Parts does not guarantee the presence, version, or compatibility of any firmware on PLC or automation products.

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PALM Parts Solution sells used surplus products. PALM Parts Solution is not an authorized distributor, affiliate, or representative for the brands we carry. Products sold by PALM Parts Solution come with PALM Parts Solution's 1-Year Warranty and do not come with the original manufacturer's warranty. Designated trademarks, brand names and brands appearing herein are the property of their respective owners. This website is not sanctioned or approved by any manufacturer or tradename listed.

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