{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MR-J4W2-44B","brand":"Mitsubishi Electric","brandSlug":"mitsubishi","productSlug":"MR-J4W2-44B","canonicalUrl":"https://aoctrl.com/mitsubishi/MR-J4W2-44B","factsUrl":"https://aoctrl.com/api/mcp/products/MR-J4W2-44B","rawCanonicalId":null},"summary":{"shortDescription":"Mitsubishi MELSERVO-J4 Series, MR-J4W2-44B digital AC servo amplifier, 2-axis, 0.4 kW per axis, SSCNETIII/H compatible, 19.5cm x 6cm x 16.8cm.","salesMarkdown":"## 2-axis servo drive for compact multi-axis stations The Mitsubishi MR-J4W2-44B is a digital AC servo amplifier from the MELSERVO-J4 Series, packing two independent axes into a single 19.5 cm by 6 cm by 16.8 cm enclosure. Each axis delivers 0.4 kW of rated output, making it a space-efficient choice for small multi-axis stations like pick-and-place gantries, labeling heads, or conveyor diverters where panel real estate is tight. Communication runs on SSCNETIII/H, Mitsubishi's high-speed motion network, so it drops into a J4-based system without a separate interface card. The W2 suffix confirms this is the 2-axis variant — one part does the work of two single-axis drives in a fraction of the DIN-rail footprint. ## What the 0.4 kW rating means on the floor 0.4 kW per axis is the continuous rated output, sized for small to medium servo motors — think 400 W class. That covers most 1/2 HP equivalent applications: indexing tables, small belt drives, or vertical axes on light assembly machines. The amplifier will drive the motor up to that load continuously; momentary peak torque during acceleration is higher, but the continuous rating is the number to match against your motor's nameplate. Because it's a dual-axis unit, the total continuous output the amplifier can source is 0.8 kW across both axes, but each axis is independently controlled — you're not sharing current between them. That matters when one axis holds a load while the other moves.","metaTitle":"Mitsubishi MR-J4W2-44B AC Servo Amplifier, 2-Axis 0.4 kW, SS","metaDescription":"Mitsubishi MR-J4W2-44B digital AC servo amplifier, 2-axis 0.4 kW per axis, SSCNETIII/H compatible, MELSERVO-J4 Series. In current production. Quoted to order against RFQ.","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","Weight":"1.4 Kg","Product No.":"MR-J4W2-44B","Manufacturer":"Mitsubishi Electric","Product Type":"Digital AC-Servo Amplifier MR-J4W-B","Number of axes":"W2 = 2","Shipping Weight":"3.5 Kg","lifecycle_stage":"current","Rated output [kW]":"44 = 0.4","Dimensions (LxWxH)":"19.5cm x 6cm x 16.8cm","Estimated Lead Time":"Usually ships in 1-10 working days."}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$662.48 – $1,379.00","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/2af8360c7ee3b1269112da7b6d8c8a0d.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/MR-J4W2-44B/alternatives.json"},"ai":{"faq":[{"question":"What is MR-J4W2-44B's SSCNETIII/H compatibility?","answer":"The MR-J4W2-44B is SSCNETIII/H compatible, meaning it communicates over Mitsubishi's high-speed motion network at the same fiber-optic protocol used across the MELSERVO-J4 Series. No separate communication module is needed."},{"question":"Where can I buy MR-J4W2-44B and how is it quoted?","answer":"The MR-J4W2-44B is sourced and quoted to order against an RFQ through independent industrial-automation distribution. Availability and current pricing are confirmed at quote time."},{"question":"Will MR-J4W2-44B drop into a panel specified around a different servo drive?","answer":"No. The MR-J4W2-44B is a Mitsubishi MELSERVO-J4 Series amplifier requiring SSCNETIII/H communication and specific motor feedback. It will not directly replace a drive from another series or brand without rewiring the motion network and motor cables."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/mitsubishi/MR-J4W2-44B","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-J4W2-44B 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}}