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Mitsubishi Electric MR-J4-20A — Servo Drives

Mitsubishi MR-J4-20A MELSERVO-J4 Servo Amplifier, 0.2 kW

MPNMR-J4-20A

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).

$766.00 – $1,377.99Ref. price · indicative, final on quote
Mitsubishi Electric MR-J4-20A datasheet (PDF)
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

MR-J4-20A key specifications
ParameterValue
Series nameMELSERVO-J4 Series 1-Axis Servo Amplifier
VoltageThree-phase AC170 V
Voltage class200V
Voltage and frequencySingle-phase AC200 V ~ 240 V, 50 Hz / 60 Hz
Allowable voltage fluctuationSingle-phase AC170 V ~ 264 V
Voltage and frequency (Note 1)Three-phase or single-phase AC200 V ~ 240 V, 50 Hz / 60 Hz
Rated current [A]0.2
Rated current (Note 14) [A]1.5
Interface for powerDC24 V ± 10% (required current capacity: including a 0.5 A (CN8 connector signal))
Power consumption [W]Thirty
Motor rated output [KW]0.2
Three-phase power supply inputYes

All specifications

MR-J4-20A additional specifications
ParameterValue
Single-phase power supply inputYes
Maximum input pulse frequency4 Mpulses / s (the time differential receiver), 200 kpulses / s (when open collector)
Allowable frequency fluctuationWithin ± 5%
RS-422 / RS-4851 up to 32 axes: n communication (Note 10)
Command interfaceGeneral-purpose interface
Communication functionUSB: connection to a personal computer (MR Configurator2 correspondence)
Machine end encoder interface- : Mitsubishi high-speed serial communication
Operating temperatureOperation: 0 ° C ~ 55 ° C (no freezing), storage: -20 ° C ~ 65 ° C (no freezing)
Ambient humidityOperation / storage: 90% RH or less (non-condensing)
Vibration resistance5.9 m / s 2, 10 Hz ~ 55 Hz (X, Y, Z each direction)
Weight0.8 kg
Shipping weight2 Kg
Positioning complete width setting0 pulse ~ ± 65535 pulses (command pulse unit)
Overseas compliance- : The correspondence to the international standards and laws, Standards Compliant pageplease refer to.
Third party certification standardsEN ISO 13849-1 Category 3 PL e, IEC 61508 SIL 3, EN 62061 SIL CL 3, EN 61800-5-2 (Note 20)
ElevationAbove sea level 2000 m or less (Note 18)
AtmosphereIndoors (no direct sunlight), that there is no corrosive gas, flammable gas, oil mist, dust and dirt
ManufacturerMitsubishi Electric
Speed limitsParameter settings or set by external analog input (DC0 V ~ ± 10 V / rated speed)
Torque limitParameter settings or set by external analog input (DC0 V ~ + 10 V / maximum torque)
Dynamic brakeBuilt-in (Note 4)
Analog monitor2 channel
Control methodSinusoidal 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
Positioning mode- : Non-compliant (Note 17)
Estimated lead timeUsually ships in 1 - 10 working days.
Full-closed control- : 2-wire communication method (Note 9)
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 rangeAnalog speed command 1: 2000, internal speed command 1: 5000
Encoder output pulseCorrespondence (ABZ-phase pulse)
Response performance8 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
Diagnostic coverageDC = medium (Medium), 97.6 [%]
Servo amplifier form nameMR-J4-20A
Analog speed command inputDC0 V ~ ± 10 V / rated speed (rotation speed at 10 V can be changed in the [Pr. PC12])
Positioning feedback pulseEncoder resolution (resolution per rotation servo motor 1): 22-bit
Analog torque command inputDC0 V ~ ± 8 V / maximum torque (input impedance: 10 kO ~ 12 kO)
Command pulse magnificationElectronic gear A / B double A = 1 ~ 16777215, B = 1 ~ 16777215,1 / 10 <A / B <4000
Structure (protection grade)- : Self-cooling, open (IP20)
Test pulse input (STO) (Note 7)Test pulse interval: 1 Hz ~ 25 Hz, test pulse off time: Up to 1 ms
Expected average dangerous failure time (MTTFd)MTTFd ? 100 [year] (314a)
The average probability of a dangerous failurePFH = 6.4 × 10 -9 [1 / h]
Servo amplifier built-in regenerative resistor (Note 2, 3) [W]Ten

Product details

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.

Frequently asked questions

What is MR-J4-20A's listed weight?

The MR-J4-20A has a listed weight of 0.8 kg, with a shipping weight of 2 kg.

Does MR-J4-20A support Safe Torque Off (STO)?

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.

What supply voltage does MR-J4-20A require?

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).

MPN
MR-J4-20A