{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MR-J4-350A","brand":"Mitsubishi Electric","brandSlug":"mitsubishi","productSlug":"MR-J4-350A","canonicalUrl":"https://aoctrl.com/mitsubishi/MR-J4-350A","factsUrl":"https://aoctrl.com/api/mcp/products/MR-J4-350A","rawCanonicalId":null},"summary":{"shortDescription":"Mitsubishi MELSERVO-J4 series, 1-Axis Servo Amplifier, MR-J4-350A, 3.5 kW rated motor output, 17.0 A output rated current, 200 V class, built-in dynamic brake.","salesMarkdown":"The Mitsubishi MR-J4-350A is a 1-axis servo amplifier from the MELSERVO-J4 series, sized for a 3.5 kW servo motor on a 200 V class three-phase supply. The 17.0 A output rated current tells you the continuous current it can deliver to the motor under rated load — that's the number to match against your motor's nameplate current, not the 0.2 A control-circuit draw. The built-in dynamic brake means the amplifier can stop the motor quickly on a fault or STO event without an external braking resistor for most inertial loads, though you'll still need one for high-inertia or vertical-axis applications where regenerative energy exceeds the internal shunt capacity. ## Power and wiring Main power comes in as three-phase AC 200 V to 240 V, 50/60 Hz, with allowable fluctuation from 170 V to 264 V — so it handles a saggy line without dropping out. The control circuit needs a separate single-phase AC 200 V to 240 V supply plus a 24 V DC ±10% logic supply that must deliver at least 0.5 A for the CN8 connector signals. That 24 V rail is often overlooked in panel builds; if your existing cabinet only has a 24 V bus rated for PLC loads, confirm it has headroom for this additional 0.5 A draw before you land the wires. ## Control and feedback The amplifier uses sinusoidal-wave PWM current control, which gives smooth torque at low speeds and reduces audible motor noise compared to trapezoidal drives. The 22-bit encoder resolution — that's 4,194,304 pulses per revolution after quadrature — gives you fine position feedback for precision indexing or contouring. For multi-axis coordination, the RS-422/485 port supports up to 32 axes in a 1:n daisy chain, which is useful for gantry or multi-axis pick-and-place cells where you want one controller talking to all drives over a single serial line. ## Setup and monitoring Configuration is done over USB using Mitsubishi's MR Configurator2 software — no special programming tool needed, just a standard USB cable to a laptop. The two analog monitor channels let you output speed, torque, or position signals as DC voltages for scope viewing or feeding into a PLC analog input for real-time monitoring. The general-purpose command interface accepts analog speed commands (0 to ±8 V for max torque) or internal speed commands selectable via parameter.","metaTitle":"Mitsubishi MR-J4-350A MELSERVO-J4 Servo Amplifier, 3.5 kW","metaDescription":"Mitsubishi MR-J4-350A 1-axis servo amplifier, 3.5 kW rated motor output, 17.0 A output current, 200 V class, built-in dynamic brake, 22-bit encoder, USB config. Active production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Servo Drives"],"specifications":{"USB":"connection to a personal computer (MR Configurator2 correspondence)","title":"MR-J4-350A","Weight":"2.3 Kg","Product no":"MR-J4-350A","Series name":"MELSERVO-J4 series 1-Axis Servo Amplifier","description":"1-Axis Servo Amplifier","Dynamic brake":"Built-in (Note 4)","Rated current":"0.2 [A]","Voltage class":"200V","Analog monitor":"2 channel","Control Method":"Sinusoidal wave PWM control and current control system","RS-422 / RS-485":"a maximum of up to 32 axes 1: n communication (Note 10)","Shipping Weight":"3.5 KG","lifecycle_stage":"current","Command interface":"General-purpose interface","Motor rated output":"3.5 [KW]","Estimated Lead Time":"Usually ships in 1 - 10 working days.","Test pulse interval":"1 Hz ~ 25 Hz, test pulse off time: Up to 1 ms","output Rated current":"17.0 [A]","output Rated voltage":"Three-phase AC170 V","Servo amplifier Model":"MR-J4-350A","Analog speed command 1":"2000, internal speed command 1: 5000","Communication function":"USB: connection to a personal computer (MR Configurator2 correspondence)","Power supply interface":"DC24 V ± 10% (required current capacity: including the 0.5 A (CN8 connector signal))","Rated current (Note 14)":"16.0","Control circuit power input":"Voltage and frequency:Single-phase AC200 V ~ 240 V, 50 Hz / 60 Hz","Allowable voltage fluctuation":"Three-phase AC170 V ~ 264 V","Permissible regenerative power":"Hundred","Voltage and frequency (Note 1)":"Three-phase AC200 V ~ 240 V, 50 Hz / 60 Hz","Allowable frequency fluctuation":"Within ± 5%","± 0.01% Or Less (Load Variation":"0% to 100%), 0% (power fluctuation: ± 10%) ± 0.2% or less (ambient temperature: 25 ° C ± 10 ° C) only when the analog speed","DC0 V ~ ± 8 V / maximum torque (input impedance":"10 kO ~ 12 kO)","Encoder resolution (resolution per servo motor revolution)":"22-bit"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1,987.00 – $3,150.37","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/6660cd0768a60884ef7d5665ab4ba938.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the MR-J4-350A's USB connection used for?","answer":"The USB port connects the amplifier to a personal computer running Mitsubishi's MR Configurator2 software for parameter setup, tuning, and diagnostics. No special programming hardware is needed beyond a standard USB cable."},{"question":"What compliance documentation is available for the MR-J4-350A?","answer":"As a Mitsubishi MELSERVO-J4 series product, the MR-J4-350A is manufactured to meet applicable IEC, UL, and CE standards for industrial servo drives. Specific certification marks and declarations of conformity are available from Mitsubishi Electric's documentation portal or through your distributor upon request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/mitsubishi/MR-J4-350A","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-J4-350A 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}}