{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"HG-KR43B","brand":"Mitsubishi Electric","brandSlug":"mitsubishi","productSlug":"HG-KR43B","canonicalUrl":"https://aoctrl.com/mitsubishi/HG-KR43B","factsUrl":"https://aoctrl.com/api/mcp/products/HG-KR43B","rawCanonicalId":null},"summary":{"shortDescription":"Mitsubishi MELSERVO-J4 series, HG-KR43B rotary servo motor, 0.4 kW, 1.3 N·m rated torque, 3000 r/min, IP65, 22-bit absolute encoder.","salesMarkdown":"The Mitsubishi HG-KR43B is a 0.4 kW rotary servo motor from the MELSERVO-J4 series, rated for 1.3 N·m continuous torque and a maximum of 4.5 N·m. It spins at 3000 r/min rated, with a top speed of 6000 r/min and an instantaneous allowable speed of 6900 r/min. The 22-bit absolute encoder (4194304 pulses/rev) gives you position hold on power loss — no homing routine after a cycle stop. Rated current draws 2.6 A, peaking at 9.1 A under load. The IP65 enclosure (all enclosed self-cooled) keeps out washdown spray, so it fits right on a food-grade conveyor or a packaging machine with periodic hose-down. ## Mechanical fit and load limits Shaft loading: 245 N radial, 98 N thrust. Keep the load inertia ratio at or below 25 times the motor inertia (0.393×10⁻⁴ kg·m²) — exceed that and the auto-tuning struggles to settle. Ambient temperature range is 0 to 40 °C operating, with 80% RH non-condensing. Elevation limit is 2000 m above sea level; no derating needed below that. Vibration resistance is 49 m/s² on both X and Y axes, and the vibration class is V10. The motor ships without an oil seal as standard — if your application sees oil mist or splash, order the HG-KR_J variant with the seal fitted.","metaTitle":"Mitsubishi HG-KR43B MELSERVO-J4 Servo Motor, 0.4 kW, 1.3 N·m","metaDescription":"Mitsubishi HG-KR43B MELSERVO-J4 servo motor, 0.4 kW, 1.3 N·m rated torque, 3000 r/min, IP65, 22-bit encoder. Active production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Servo Motors"],"specifications":{"Oil seal":"None (servo motor with an oil seal is also available. (HG-KR_J))","Elevation":"Above sea level 2000 m or less","Mass [kg]":"1.8","Atmosphere":"Indoors (no direct sunlight), that there is no corrosive gas, flammable gas, oil mist, dust and dirt","Radial [N]":"245","Thrust [N]":"98","Series name":"MELSERVO-J4 series","Construction":"All enclosed self cold (protection rating: IP65) (Note 2)","Manufacturer":"Mitsubishi Electric","Thermal class":"130 (B)","Voltage class":"200V","Shipping Weight":"3 Kg","Vibration class":"V10 * 6","lifecycle_stage":"current","Ambient humidity":"Operation: 80% RH or less (non-condensing), storage: 90% RH or less (non-condensing)","Command interface":"CC-Link IE field network interface SSCNET / H interface 2-axis integrated SSCNET / H interface 3-axis integrated SSCNET / H interface general-purpose interface","Rated current [A]":"2.6","Estimated Lead Time":"Usually ships in 1 - 10 working days.","Maximum current [A]":"9.1","Overseas Compliance":"The correspondence to the international standards and laws, Standards Compliant pageplease refer to.","SSCNET / H interface":"J4-40B-MR MR-J4-40B-RJ","MR-J4W_- [Times / min]":"268","Maximum torque [N · m]":"4.5","Vibration resistance * 4":"X: 49 M / S 2 Y: 49 M / S 2","General-purpose interface":"J4-40A-MR MR-J4-40A-RJ","Speed and position detector":"Absolute position incremental shared 22-bit encoder (resolution per rotation servo motor 1: 4194304 pulses / rev)","Environmental conditions * 3":"Ambient temperature : Operation: 0 ° C ~ 40 ° C (no freezing), storage: -15 ° C ~ 70 ° C (no freezing)","Rotary servo motor form name":"HG-KR43B","Corresponding servo amplifier":"CC-Link IE field network interface : J4-40GF-MR MR-J4-40GF-RJ MR-J4-40B-RJ010","Axis of the allowable load * 5":"L [Mm] : Thirty","Rated torque (Note 3) [N · m]":"1.3","Declared engine speed [R / min]":"3000","Power supply capacity * 1 [KVA]":"0.9","Maximum rotational speed [R / min]":"6000","2-axis integrated SSCNET / H interface":"J4W2-44B-MR MR-J4W2-77B MR-J4W2-1010B","3-axis integrated SSCNET / H interface":"MR-J4W3-444B","The regenerative braking frequency * 2":"MR-J4- [Times / min] : 268","Moment of inertia J [× 10 -4Kg · M 2]":"0.393","Continuous characteristics Rated output [KW]":"0.4","Recommended load inertia moment ratio (Note 1)":"25 times or less","Instantaneous allowable rotation speed [R / min]":"6900","Power rate at the time of continuous rating torque [KW / s]":"41.3"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$737.00 – $930.91","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/HG-KR43B/alternatives.json"},"ai":{"faq":[{"question":"Does the HG-KR43B come with an oil seal?","answer":"No, the standard motor has no oil seal. A variant with an oil seal is available under the HG-KR_J order code."},{"question":"What is the maximum elevation for operation?","answer":"The motor is rated for operation at altitudes up to 2000 m above sea level."},{"question":"What servo amplifiers are compatible with the HG-KR43B?","answer":"Compatible amplifiers include the MR-J4-40B-RJ (SSCNET/H), MR-J4-40A-RJ (general-purpose), MR-J4-40GF-RJ (CC-Link IE Field), and multi-axis units such as the MR-J4W2-44B."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/mitsubishi/HG-KR43B","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-KR43B 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}}