{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MR-J4-60B","brand":"Mitsubishi Electric","brandSlug":"mitsubishi","productSlug":"MR-J4-60B","canonicalUrl":"https://aoctrl.com/mitsubishi/MR-J4-60B","factsUrl":"https://aoctrl.com/api/mcp/products/MR-J4-60B","rawCanonicalId":null},"summary":{"shortDescription":"Mitsubishi MR-J4 Series Servo Amplifier Model MR-J4-60B, 3.2 A output rated current, 3-phase 170 VAC output, built-in dynamic brake, STO safety function, IP20 open frame.","salesMarkdown":"## Servo amplifier for a 60B-frame motor The Mitsubishi MR-J4-60B is a servo amplifier from the MR-J4 series, matched to a 60B-frame motor. Its 3.2 A output rated current at 3-phase 170 VAC drives the motor through sine-wave PWM current control. The main circuit accepts 3-phase or 1-phase 200 VAC to 240 VAC, 50/60 Hz, so it works on a standard 208–240 V industrial supply without a transformer. A built-in dynamic brake stops the motor quickly when the drive is disabled or a fault occurs, which matters for vertical loads or short deceleration profiles where coasting is unsafe. The amplifier supports close mounting to adjacent units, saving panel width. The STO safety function (IEC/EN 61800-5-2) removes torque without removing power from the drive, letting you integrate this into a safety circuit that meets SIL 3 / PL e requirements. The interface supply is 24 VDC ±10% at 0.3 A, including the CN8 connector signal. The 3.2 A output rated current is the continuous current the amplifier delivers to the motor. Pair it with a servo motor whose rated current is at or below 3.2 A — typically a 400 W to 750 W class motor in the MR-J4 family. The 170 VAC output voltage matches the motor's winding voltage; do not use this amplifier with a 400 V-class motor. The main circuit supply draws 3.2 A at rated load. The control circuit supply draws 0.2 A from a separate 1-phase 200–240 VAC source. Both numbers are needed to size the branch circuit and the control transformer. Mount it inside a panel with at least IP54 enclosure protection. Natural cooling is sufficient at rated current; derate if ambient exceeds 40 °C or if the panel has poor airflow. ## Integration notes Communication is via USB for connection to a PC running MR Configurator2. No fieldbus module is built in; add an optional MR-J4-T or MR-J4-GF bus interface card if you need CC-Link, PROFINET, or EtherCAT. The load-side encoder interface uses Mitsubishi high-speed serial communication — only MR-J4 series motors with the matching encoder connector work.","metaTitle":"Mitsubishi MR-J4-60B Servo Amplifier, 3.2 A Output, STO","metaDescription":"Mitsubishi MR-J4-60B servo amplifier, 3.2 A rated output at 170 VAC, built-in dynamic brake, STO safety (IEC 61800-5-2). Current lifecycle. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Servo Drives"],"specifications":{"Weight":"1 Kg","Product No.":"MR-J4-60B","Manufacturer":"Mitsubishi","Product type":"Servo Amplifier Model MR-J4","Dynamic Brake":"Built-in","Close Mounting":"Possible","Control Method":"Sine-wave PWM control/current control method","Safety Function":"STO (IEC/EN 61800-5-2)","Shipping weight":"2 Kg","lifecycle_stage":"current","Estimated Lead Time":"1 - 10 working days","Output Rated Voltage":"3-phase 170 VAC","Structure (IP Rating)":"Natural cooling, open (IP20)","Communication Function":"USB: Connect a personal computer (MR Configurator2 compatible)","Interface Power Supply":"24 VDC ±10% (required current capacity: 0.3 A (including CN8 connector signal))","Output Rated Current (A)":"3.2","Load-Side Encoder Interface":"Mitsubishi high-speed serial communication","Main Circuit Power Supply Rated Current (A)":"3.2","Main Circuit Power Supply Voltage/Frequency":"3-phase or 1-phase 200 VAC to 240 VAC, 50/60 Hz","Control Circuit Power Supply Rated Current (A)":"0.2","Control Circuit Power Supply Voltage/Frequency":"1-phase 200 VAC to 240 VAC, 50/60 Hz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$938.00 – $1,073.39","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/002110c06bf22cb88b587ff089b1fcb6.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/MR-J4-60B/alternatives.json"},"ai":{"faq":[{"question":"What is the output current rating of MR-J4-60B?","answer":"The MR-J4-60B is rated for 3.2 A continuous output current at 3-phase 170 VAC. This matches it to a 400 W to 750 W servo motor in the MR-J4 family."},{"question":"Does MR-J4-60B have a built-in dynamic brake?","answer":"Yes, the MR-J4-60B has a built-in dynamic brake. It stops the motor quickly when the drive is disabled, which is important for vertical loads or short deceleration profiles."},{"question":"What safety function does MR-J4-60B support?","answer":"The MR-J4-60B supports STO (Safe Torque Off) per IEC/EN 61800-5-2. This allows integration into safety circuits up to SIL 3 / PL e without removing power from the drive."},{"question":"Where can I buy MR-J4-60B and get current pricing?","answer":"The MR-J4-60B is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/mitsubishi/MR-J4-60B","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/mitsubishi/MR-J4-60B when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}