{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MR-J4W3-444B","brand":"Mitsubishi Electric","brandSlug":"mitsubishi","productSlug":"MR-J4W3-444B","canonicalUrl":"https://aoctrl.com/mitsubishi/MR-J4W3-444B","factsUrl":"https://aoctrl.com/api/mcp/products/MR-J4W3-444B","rawCanonicalId":null},"summary":{"shortDescription":"Mitsubishi MELSERVO-J4 Series, MR-J4W3-444B, digital AC servo amplifier, 2-axis, 0.4 kW per axis, SSCNETIII/H compatible.","salesMarkdown":"The Mitsubishi MR-J4W3-444B is a digital AC servo amplifier from the MELSERVO-J4 Series, controlling two axes at 0.4 kW rated output each. It communicates over SSCNETIII/H, the high-speed synchronous motion bus that ties it to a compatible controller without pulse-train wiring or analog tach feedback. That means the loop closure and tuning happen inside the drive, not the PLC — useful when you need coordinated multi-axis moves over a single cable.","metaTitle":"Mitsubishi MR-J4W3-444B AC Servo Amplifier, 2-Axis, 0.4 kW,","metaDescription":"Mitsubishi MR-J4W3-444B digital AC servo amplifier, MELSERVO-J4 Series, 2-axis, 0.4 kW per axis, SSCNETIII/H compatible. Current production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Servo Drives"],"specifications":{"B":"SSCNETIII/H compatible","MR-J4":"AC servo amplifier MELSERVO-J4 Series","title":"MR-J4W3-444B","Weight":"2.3 Kg","Product No.":"MR-J4W3-444B","description":"Digital AC-Servo Amplifier MR-J4W-B","Product Type":"Digital AC-Servo Amplifier MR-J4W-B","Number of axes":"W2 = 2","Shipping Weight":"4.5 Kg","lifecycle_stage":"current","Rated output [kW]":"444 = 0.4","Dimensions (LxWxH)":"19.5cm x 8.5cm x 16.8cm","Estimated Lead Time":"Usually ships in 1-10 working days."}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1,931.00 – $3,397.00","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/2af8360c7ee3b1269112da7b6d8c8a0d.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What does SSCNETIII/H compatible mean for this drive?","answer":"It means the amplifier communicates over Mitsubishi's high-speed synchronous motion bus, carrying position commands and feedback over a single fiber-optic or electrical cable. No pulse-train wiring or analog tach feedback is needed — the loop closes inside the drive."},{"question":"Will the MR-J4W3-444B drop into a panel specified around the FX5-80SSC-S?","answer":"No. The FX5-80SSC-S is a simple motion module that generates pulse trains to external drives. The MR-J4W3-444B is a network-based servo amplifier that requires an SSCNETIII/H controller. They are not electrically or mechanically interchangeable without rewiring the motion bus."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/mitsubishi/MR-J4W3-444B","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-J4W3-444B when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}