{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"HG-KR73B","brand":"Mitsubishi Electric","brandSlug":"mitsubishi","productSlug":"HG-KR73B","canonicalUrl":"https://aoctrl.com/mitsubishi/HG-KR73B","factsUrl":"https://aoctrl.com/api/mcp/products/HG-KR73B","rawCanonicalId":null},"summary":{"shortDescription":"Mitsubishi Electric HG-KR73B rotary servo motor, with electromagnetic brake, 0.75 kW rated output, 3000 r/min rated speed, 2.4 N·m rated torque, IP65, low inertia small capacity.","salesMarkdown":"## 0.75 kW servo with brake for high-duty-cycle positioning The HG-KR73B is a Mitsubishi Electric rotary servo motor rated at 0.75 kW continuous output with a rated speed of 3000 r/min and a maximum speed of 6000 r/min. It delivers 2.4 N·m rated torque and a peak of 8.4 N·m for acceleration and deceleration phases. The built-in electromagnetic brake holds the load at rest when power is removed, which is essential for vertical-axis applications where the load must not drop during a power loss or at standstill. It is part of the HG-KR low-inertia, small-capacity series, designed for applications requiring fast acceleration and precise positioning with a recommended load-to-motor inertia ratio of 17 times or less. ## Encoder and feedback for absolute position tracking The motor carries a 22-bit absolute position incremental shared encoder, giving 4,194,304 pulses per revolution. This resolution allows the servo drive to know the rotor position immediately on power-up without a homing sequence, saving cycle time on multi-axis machines. The encoder is absolute, so the position is retained even after a power cycle — no need to re-reference the axis on every startup. The 22-bit resolution delivers fine positioning down to sub-arcminute increments. ## Matching servo amplifiers and interface options This motor works with several Mitsubishi MR-J4 series servo amplifiers depending on the network interface required. For SSCNET/H networks, pair it with the MR-J4-70B or MR-J4-70B-RJ. For general-purpose pulse-train control, use the MR-J4-70A or MR-J4-70A-RJ. For a 2-axis integrated SSCNET/H drive, use the MR-J4W2-77B or MR-J4W2-1010B. The command interface options cover CC-Link IE field network, SSCNET/H, 2-axis integrated SSCNET/H, and general-purpose interfaces, so the same motor can be specified across different control architectures by selecting the appropriate amplifier. ## Environmental sealing and mounting constraints The motor is rated IP65 (all enclosed self-cooled construction), meaning it is dust-tight and protected against water jets from any direction. This makes it suitable for washdown environments and areas with moderate coolant exposure, though it lacks an oil seal — if oil mist or splash is present, specify the variant with an oil seal (HG-KR_J). Ambient operating temperature is not explicitly stated in the spec, but the thermal class is 130 (B), so the winding insulation is rated for a 130 °C hot-spot temperature. The motor is intended for indoor use without corrosive gas, flammable gas, oil mist, or dust, and at altitudes up to 2000 m. Vibration resistance is 49 m/s² in both X and Y axes, and the vibration class is V10. The allowable radial load on the shaft is 392 N and thrust load is 147 N — respect these limits to avoid bearing fatigue. ## Inertia and dynamic response The rotor moment of inertia is 1.37 × 10⁻⁴ kg·m², placing it in the low-inertia category. Combined with the 17× recommended load inertia ratio, this motor is well suited for applications requiring rapid direction changes and short settling times, such as pick-and-place or high-speed indexing. Rated current is 4.8 A and maximum current is 17 A, so the amplifier must be sized to supply the peak current during acceleration. The power supply capacity required is 1.3 kVA. The HG-KR73B is sourced to order through independent distribution channels.","metaTitle":"Mitsubishi Electric HG-KR73B Servo Motor with Brake, 0.75 kW","metaDescription":"Mitsubishi Electric HG-KR73B rotary servo motor with brake, 0.75 kW, 3000 r/min, 2.4 N·m rated torque, IP65, 22-bit encoder. Active production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Servo Motors with Brake"],"specifications":{"title":"HG-KR73B","Weight":"3.8 Kg","Oil seal":"None (servo motor with an oil seal is also available. (HG-KR_J))","Elevation":"Above sea level 2000 m or less","Atmosphere":"Indoors (no direct sunlight), that there is no corrosive gas, flammable gas, oil mist, dust and dirt","Product no":"HG-KR73B","Thrust [N]":"147","radial [N]":"392","description":"HG-KR Rotary Servo Motor","Construction":"All enclosed self cold (protection rating: IP65) (Note 2)","Product type":"HG-KR Rotary Servo Motor","Thermal class":"130 (B)","Voltage class":"200V","Shipping Weight":"5 Kg","Vibration class":"V10 * 6","lifecycle_stage":"current","Ambient humidity":"Operation: 80% RH or less (non-condensing), storage: 90% RH or less (non-condensing)","Inertia/capacity":"HG-KR = Low inertia, small capacity","Command interface":"CC-Link IE field network interface , SSCNET / H interface , 2-axis integrated SSCNET / H interface general-purpose interface","Rated current [A]":"4.8","Rated output [kW]":"7 = 0.75","Estimated Lead Time":"Usually ships in 1 - 10 working days.","Maximum current [A]":"17","Overseas Compliance":"The correspondence to the international standards and laws, Standards Compliant pageplease refer to.","Rated speed [r/min]":"3 = 3000","Electromagnetic brake":"B = Installed","MR-J4W_- [Times / min]":"393","SSCNET / H , interface":"MR-J4-70B , MR-J4-70B-RJ","Maximum torque [N · m]":"8.4","Vibration resistance * 4":"X: 49 m / s 2 Y : 49 m / s 2","General-purpose interface":"MR-J4-70A , MR-J4-70A-RJ","Speed and position detector":"Absolute position incremental shared 22-bit encoder (resolution per rotation servo motor 1: 4194304 pulses / rev)","Rotary servo motor form name":"HG-KR73B","Rated torque (Note 3) [N · m]":"2.4","Declared engine speed [R / min]":"3000","Power supply capacity * 1 [KVA]":"1.3","Maximum rotational speed [R / min]":"6000","Axis of the allowable load * 5 L [Mm]":"Forty","2-axis integrated SSCNET / H interface":"MR-J4W2-77B , MR-J4W2-1010B","Moment of inertia J [× 10 -4Kg · M 2 ]":"1.37","Continuous characteristics Rated output [KW]":"0.75","Recommended load inertia moment ratio (Note 1)":"17 times or less","Environmental conditions * 3 Ambient temperature":"Operation: 0 ° C ~ 40 ° C (no freezing), storage: -15 ° C ~ 70 ° C (no freezing)","Instantaneous allowable rotation speed [R / min]":"6900","Power rate at the time of continuous rating torque [KW / s]":"41.6","The regenerative braking frequency * 2 MR-J4- [Times / min]":"157","Corresponding servo amplifier CC-Link IE , field network , interface":"MR-J4-70GF , MR-J4-70GF-RJ , MR-J4-70B-RJ010"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$773.00 – $1,651.60","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/d6c368af449ef4699186811fff199fc5.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to HG-KR73B in this servo motor family?","answer":"The HG-KR series includes motors with and without an oil seal. The variant with an oil seal is available under the HG-KR_J order code suffix. For different power ratings within the same frame size, the HG-KR series offers other output levels, but the 0.75 kW with brake is specific to this model. No direct pin-compatible alternative is listed by the manufacturer."},{"question":"What compliance documentation does Mitsubishi Electric provide for HG-KR73B?","answer":"The manufacturer states the motor corresponds to international standards and laws, directing users to the Standards Compliant page for specific certifications. The IP65 rating indicates compliance with IEC 60529 for enclosure protection."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/mitsubishi/HG-KR73B","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/HG-KR73B 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}}