{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MR-J4-20A","brand":"Mitsubishi Electric","brandSlug":"mitsubishi","productSlug":"MR-J4-20A","canonicalUrl":"https://aoctrl.com/mitsubishi/MR-J4-20A","factsUrl":"https://aoctrl.com/api/mcp/products/MR-J4-20A","rawCanonicalId":null},"summary":{"shortDescription":"Mitsubishi MELSERVO-J4 Series, MR-J4-20A 1-Axis Servo Amplifier, 0.2 kW motor rated output, 0.2 A rated current, 200 V class, single/three-phase AC170-240 V input, STO safety function (IEC/EN 61800-5-2).","salesMarkdown":"## MELSERVO-J4 1-Axis Servo Amplifier for 0.2 kW Motors The Mitsubishi MR-J4-20A is a 1-axis servo amplifier from the MELSERVO-J4 series, sized for a 0.2 kW servo motor (0.2 A rated current) on a 200 V class supply — single-phase 200–240 V AC or three-phase 170 V AC, 50/60 Hz. Control is sinusoidal-wave PWM with current control; speed, torque, and position are set via parameter or external analog input (DC 0–±10 V for speed, DC 0–+10 V for torque). Built-in dynamic brake (Note 4) and a Safe Torque Off (STO) function per IEC/EN 61800-5-2 are standard — STO response is 8 ms or less from input off to energy cut-off. The 0.2 kW motor rating and 0.2 A rated current define the load envelope: this amplifier drives a small servo motor — think indexing tables, pick-and-place axes, or tensioning spindles that need precise speed and torque control at low power. Speed control range is 1:2000 on analog command, 1:5000 on internal command, with speed variation of ±0.01% or less under load change (0–100%) — tight enough for most positioning tasks in packaging or assembly cells. Protective functions cover over-current, regenerative overvoltage, overload (electronic thermal), motor overheat, encoder error, undervoltage, instantaneous power failure, overspeed, and excessive error (±3 rotations) — comprehensive fault coverage for a single-axis drive. Operates indoors (no direct sunlight, no corrosive gas, flammable gas, oil mist, dust or dirt) at 0–55 °C ambient, 90% RH non-condensing, elevation up to 2000 m — standard industrial cabinet conditions. Communication is via USB for PC connection (MR Configurator2) and RS-422/485 for multi-axis networking (up to 32 axes). Full-closed control uses 2-wire communication method (Note 9). Analog monitor outputs (2 channels) and encoder ABZ-phase pulse output are available for external monitoring or position feedback. International standards compliance is noted (overseas compliance per Note 27), though specific certification marks (UL, CE, UKCA) are not enumerated in the standard spec record — verify per your jurisdiction's requirements.","metaTitle":"Mitsubishi MR-J4-20A MELSERVO-J4 Servo Amplifier, 0.2 kW","metaDescription":"MR-J4-20A MELSERVO-J4 1-axis servo amplifier, 0.2 kW, 0.2 A rated current, 200 V class, STO safety. Current production. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Servo Drives"],"specifications":{"Weight":"0.8 kg","Elevation":"Above sea level 2000 m or less (Note 18)","Atmosphere":"Indoors (no direct sunlight), that there is no corrosive gas, flammable gas, oil mist, dust and dirt","Product no":"MR-J4-20A","Series name":"MELSERVO-J4 Series 1-Axis Servo Amplifier","Manufacturer":"Mitsubishi Electric","Speed limits":"Parameter settings or set by external analog input (DC0 V ~ ± 10 V / rated speed)","Torque limit":"Parameter settings or set by external analog input (DC0 V ~ + 10 V / maximum torque)","Dynamic brake":"Built-in (Note 4)","Rated voltage":"Three-phase AC170 V","Voltage class":"200V","Analog monitor":"2 channel","Control Method":"Sinusoidal wave PWM control and current control system","Safety feature":"- : STO (IEC / EN 61800-5-2)","Servo function":"- : Advanced vibration suppression control , adaptive filter , robust filter, auto-tuning, one-touch adjustment, tough drive function, drive recorder function, machine diagnostic functions, the power monitor function, super trace control (Note 15), lost motion correction function (Note 15 )","Excessive error":"± 3 rotation","RS-422 / RS-485":"1 up to 32 axes: n communication (Note 10)","Shipping Weight":"2 Kg","lifecycle_stage":"current","Ambient humidity":"Operation / storage: 90% RH or less (non-condensing)","Positioning mode":"- : Non-compliant (Note 17)","Command interface":"General-purpose interface","Rated current [A]":"0.2","Ambient temperature":"Operation: 0 ° C ~ 55 ° C (no freezing), storage: -20 ° C ~ 65 ° C (no freezing)","Estimated Lead Time":"Usually ships in 1 - 10 working days.","Full-closed control":"- : 2-wire communication method (Note 9)","Interface for power":"DC24 V ± 10% (required current capacity: including a 0.5 A (CN8 connector signal))","Overseas Compliance":"- : The correspondence to the international standards and laws, Standards Compliant pageplease refer to.","Protective function":"- : Over-current cut-off, regenerative overvoltage shut-off, overload shut-off (electronic thermal), servo motor overheating protection, encoder error protection, regenerative error protection, undervoltage protection, instantaneous power failure protection, overspeed protection, excessive error protection, magnetic pole detection and protection, linear servo control error protection","Speed control range":"Analog speed command 1: 2000, internal speed command 1: 5000","Encoder output pulse":"Correspondence (ABZ-phase pulse)","Response performance":"8 ms or less (STO input off ? energy cut-off)","Speed variation rate":"± 0.01% or less (load variation: 0% to 100%), 0% (power fluctuation: ± 10%) ± 0.2% or less: only (ambient temperature 25 ° C ± 10 ° C) when the analog speed command","Vibration resistance":"5.9 m / s 2, 10 Hz ~ 55 Hz (X, Y, Z each direction)","Power consumption [W]":"Thirty","Voltage and frequency":"Single-phase AC200 V ~ 240 V, 50 Hz / 60 Hz","Communication function":"USB: connection to a personal computer (MR Configurator2 correspondence)","Motor rated output [KW]":"0.2","Diagnostic coverage (DC)":"DC = medium (Medium), 97.6 [%]","Servo amplifier form name":"MR-J4-20A","Analog speed command input":"DC0 V ~ ± 10 V / rated speed (rotation speed at 10 V can be changed in the [Pr. PC12])","Positioning feedback pulse":"Encoder resolution (resolution per rotation servo motor 1): 22-bit","Analog torque command input":"DC0 V ~ ± 8 V / maximum torque (input impedance: 10 kO ~ 12 kO)","Command pulse magnification":"Electronic gear A / B double A = 1 ~ 16777215, B = 1 ~ 16777215,1 / 10 <A / B <4000","Rated current (Note 14) [A]":"1.5","Structure (protection grade)":"- : Self-cooling, open (IP20)","Allowable voltage fluctuation":"Single-phase AC170 V ~ 264 V","Machine end encoder interface":"- : Mitsubishi high-speed serial communication","Maximum input pulse frequency":"4 Mpulses / s (the time differential receiver), 200 kpulses / s (when open collector)","Three-phase power supply input":"Yes","Voltage and frequency (Note 1)":"Three-phase or single-phase AC200 V ~ 240 V, 50 Hz / 60 Hz","Allowable frequency fluctuation":"Within ± 5%","Single-phase power supply input":"Yes","Test pulse input (STO) (Note 7)":"Test pulse interval: 1 Hz ~ 25 Hz, test pulse off time: Up to 1 ms","Positioning complete width setting":"0 pulse ~ ± 65535 pulses (command pulse unit)","Third party certification standards":"EN ISO 13849-1 Category 3 PL e, IEC 61508 SIL 3, EN 62061 SIL CL 3, EN 61800-5-2 (Note 20)","Expected average dangerous failure time (MTTFd)":"MTTFd ? 100 [year] (314a)","The average probability of a dangerous failure (PFH)":"PFH = 6.4 × 10 -9 [1 / h]","Servo amplifier built-in regenerative resistor (Note 2, 3) [W]":"Ten"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$766.00 – $1,377.99","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/cb5560e4735917161dc44ff2778e9da0.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/MR-J4-20A/alternatives.json"},"ai":{"faq":[{"question":"What is MR-J4-20A's listed weight?","answer":"The MR-J4-20A has a listed weight of 0.8 kg, with a shipping weight of 2 kg."},{"question":"Does MR-J4-20A support Safe Torque Off (STO)?","answer":"Yes, the MR-J4-20A includes STO per IEC/EN 61800-5-2, with a response performance of 8 ms or less from STO input off to energy cut-off."},{"question":"What supply voltage does MR-J4-20A require?","answer":"The MR-J4-20A accepts single-phase AC 200–240 V, 50/60 Hz, or three-phase AC 170 V. A separate DC 24 V ±10% supply is needed for the control interface (CN8 connector, 0.5 A required)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/mitsubishi/MR-J4-20A","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-J4-20A 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}}