{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MR-J4-70B","brand":"Mitsubishi Electric","brandSlug":"mitsubishi","productSlug":"MR-J4-70B","canonicalUrl":"https://aoctrl.com/mitsubishi/MR-J4-70B","factsUrl":"https://aoctrl.com/api/mcp/products/MR-J4-70B","rawCanonicalId":null},"summary":{"shortDescription":"Mitsubishi Electric MR-J4-70B servo amplifier, 0.75 kW, 200V class, SSCNET III/H, STO functional safety, built-in dynamic brake.","salesMarkdown":"## Mitsubishi MR-J4-70B servo amplifier — 0.75 kW, 200V class, SSCNET III/H The MR-J4-70B is a 0.75 kW servo amplifier in Mitsubishi's MR-J4 series, running on three-phase or single-phase 200–240 VAC mains at 50/60 Hz. It drives a compatible servo motor via the SSCNET III/H motion network at communication cycles of 0.222 ms, 0.444 ms, or 0.888 ms — tight enough for synchronized multi-axis lines. Rated output current is 5.8 A, with a main circuit input draw of 3.8 A. The built-in dynamic brake handles emergency stops without an external resistor bank for most load inertia ratios. Functional safety is covered by STO per IEC/EN 61800-5-2, with a PFH of 6.4 × 10⁻⁹ 1/h. The STO input responds in 8 ms or less from signal-off to energy cutoff, and it accepts test pulse inputs from 1 Hz to 25 Hz with a max off-time of 1 ms — clean integration into a safety PLC or light curtain circuit. Elevation limit is 2000 meters above sea level; above that, derate for air density and creepage distances. Vibration tolerance is 5.9 m/s² from 10 to 55 Hz in X, Y, Z — fine for panel-mounted installation on a machine base, but not for direct mounting on a high-vibration axis. The USB port on the front panel connects to a PC running MR Configurator 2 for setup, tuning, and drive recorder playback. Two analog monitor channels let you scope torque, speed, or position on a scope without extra DAQ hardware. Built-in advanced vibration suppression, adaptive and robust filters, auto tuning, one-touch adjustment, and the tough drive function mean the amplifier handles load resonance and stiffness changes without an external filter or a tuning marathon. The drive recorder captures waveform data for post-mortem analysis on intermittent faults. Full closed-loop control is supported via a 2-wire serial encoder interface on the motor end, and the amplifier outputs ABZ-phase encoder pulses for an external controller or counter.","metaTitle":"Mitsubishi MR-J4-70B Servo Amplifier, 0.75 kW, 200V, SSCNET","metaDescription":"Mitsubishi MR-J4-70B servo amplifier, 0.75 kW, 200V class, SSCNET III/H interface, STO functional safety. Active production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Servo Drives"],"specifications":{"Weight":"1.4 Kg","Elevation":"2000 meters above sea level","Atmosphere":"Indoor (not to be exposed to direct sunlight), corrosive gas, inflammable gas, oil mist, dust free","Product No.":"MR-J4-70B","Manufacturer":"Mitsubishi Electric","Product type":"Servo Amplifier","Dynamic brake":"Built in","Voltage class":"200V","capacity [kW]":"0.75","Analog monitor":"2 channels","Anti-vibration":"5.9 m / s 2 , 10 Hz to 55 Hz (X, Y, Z directions)","Control Method":"Sine wave PWM control · Current control system","Servo function":"Advanced vibration suppression control ?, adaptive filter ?, robust filter, auto tuning, one-touch adjustment, tough drive function, drive recorder function, pushing control, mechanical diagnostic function, power monitoring function, master / slave operation function, scale measurement function, J3 compatible Mode, super trace control, lost motion correction function","Shipping Weight":"4 Kg","lifecycle_stage":"current","Ambient humidity":"Operation / storage: 5% RH to 90% RH (no condensation)","About constraints":"Since restriction items are not displayed at the time of specification comparison, please see the specification of each model.","Command interface":"SSCNET III / H interface","Functional safety":"STO (IEC / EN 61800-5-2)","Estimated Lead Time":"Usually ships in 1 - 10 working days.","Full closed control":"2 wire communication method","Protection function":"Overcurrent cutoff, regenerative overvoltage cutoff, overload shutdown (electronic thermal), servomotor overheat protection, encoder error protection, regenerative error protection, undervoltage protection, instantaneous power failure protection, overspeed protection, overload protection, magnetic pole detection protection, linear Servo control fault protection","Encoder output pulse":"Correspondence (ABZ phase pulse)","Output Rated voltage":"Three-phase AC 170 V","Response performance":"8 ms or less (STO input off ? energy cutoff)","Diagnostic scope (DC)":"DC = medium (Medium), 97.6 [%]","Communication function":"USB: Connection with personal computer etc. (MR Configurator 2 compatible)","Interface power supply":"DC 24 V ± 10% (Required current capacity: 0.3 A (including CN 8 connector signal))","Test pulse input (STO)":"Test pulse interval: 1 Hz to 25 Hz, test pulse off time: maximum 1 ms","Output Rated current [A]":"5.8","Single phase power input":"Yes","Servo amplifier model name":"MR-J 4-70 B","Overseas compliance standard":"For compliance with overseas standards / laws and regulations, please refer to the conformity product page .","Structure (protection class)":"Cooling, opening (IP 20)","Machine end encoder interface":"Mitsubishi Electric high-speed serial communication","Close attachment Three-phase power input":"Yes","Main circuit power input Rated current [A]":"3.8","SSCNET III / H command communication cycle":"0.222 ms, 0.444 ms, 0.888 ms","Environmental condition Ambient temperature":"Operation: 0 ° C to 55 ° C (no freezing), storage: -20 ° C to 65 ° C (no freezing)","Main circuit power input Voltage / frequency":"Three phase or single phase AC 200 V to 240 V, 50 Hz / 60 Hz","Average probability of dangerous side failure (PFH)":"PFH = 6.4 × 10 -9 [1 / h]","Control circuit power supply input Rated current [A]":"0.2","Expected average dangerous side failure time (MTTFd)":"MTTF d ? 100 [Year] (314 a)","Main circuit power input Allowable voltage variation":"Three phase or single phase AC 170 V to 264 V","Control circuit power supply input Voltage / frequency":"Single phase AC 200 V to 240 V, 50 Hz / 60 Hz","Main circuit power input Allowable frequency variation":"Within ± 5%","Safety performance Third Party Authentication Standard":"EN ISO 13849-1 Category 3 PL e, IEC 61508 SIL 3, EN 62061 SIL CL 3, EN 61800-5-2","Control circuit power supply input power consumption [W]":"30","Control circuit power supply input Allowable voltage variation":"Single phase AC 170 V to 264 V","Control circuit power supply input Allowable frequency variation":"Within ± 5%","Allowable regenerative power Regenerative resistor with built-in servo amplifier [W]":"20"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$645.00 – $1,096.51","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/d6c368af449ef4699186811fff199fc5.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/MR-J4-70B/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the MR-J4-70B and get a price?","answer":"The MR-J4-70B is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the MR-J4-70B's weight?","answer":"The MR-J4-70B weighs 1.4 kg (unit) with a shipping weight of 4 kg including packaging."},{"question":"What is the MR-J4-70B's elevation limit?","answer":"The MR-J4-70B is rated for installation up to 2000 meters above sea level."},{"question":"What functional safety does the MR-J4-70B support?","answer":"The MR-J4-70B includes STO (Safe Torque Off) per IEC/EN 61800-5-2 with a PFH of 6.4 × 10⁻⁹ 1/h and an STO response time of 8 ms or less."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/mitsubishi/MR-J4-70B","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-J4-70B 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}}